Class: Array

Inherits:
Object show all
Includes:
Enumerable
Defined in:
opal/opal/corelib/array.rb,
opal/opal/corelib/array/pack.rb,
opal/opal/corelib/marshal/write_buffer.rb

Defined Under Namespace

Classes: SampleRandom

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Enumerable

#all?, #chunk, #chunk_while, #collect_concat, #detect, #drop_while, #each_cons, #each_entry, #each_slice, #each_with_index, #each_with_object, #entries, #enumerator_size, #find_all, #find_index, #grep, #grep_v, #group_by, #inject, #lazy, #max_by, #min_by, #minmax, #minmax_by, #none?, #one?, #partition, #slice_after, #slice_before, #slice_when, #sort_by, #sum

Constructor Details

#initialize(size = nil, obj = nil, &block) ⇒ Array

Returns a new instance of Array.



24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
 
# File 'opal/opal/corelib/array.rb', line 24

def initialize(size = nil, obj = nil, &block)
  %x{
    if (obj !== nil && block !== nil) {
      #{warn('warning: block supersedes default value argument')}
    }

    if (size > #{Integer::MAX}) {
      #{raise ArgumentError, 'array size too big'}
    }

    if (arguments.length > 2) {
      #{raise ArgumentError, "wrong number of arguments (#{`arguments.length`} for 0..2)"}
    }

    if (arguments.length === 0) {
      self.splice(0, self.length);
      return self;
    }

    if (arguments.length === 1) {
      if (size.$$is_array) {
        #{replace(size.to_a)}
        return self;
      } else if (#{size.respond_to? :to_ary}) {
        #{replace(size.to_ary)}
        return self;
      }
    }

    size = #{Opal.coerce_to size, Integer, :to_int}

    if (size < 0) {
      #{raise ArgumentError, 'negative array size'}
    }

    self.splice(0, self.length);
    var i, value;

    if (block === nil) {
      for (i = 0; i < size; i++) {
        self.push(obj);
      }
    }
    else {
      for (i = 0, value; i < size; i++) {
        value = block(i);
        self[i] = value;
      }
    }

    return self;
  }
end

Class Method Details

.[](*objects) ⇒ Object 



20
21
22
 
# File 'opal/opal/corelib/array.rb', line 20

def self.[](*objects)
  `toArraySubclass(objects, self)`
end

.inherited(klass) ⇒ Object 



2335
2336
2337
2338
2339
2340
2341
 
# File 'opal/opal/corelib/array.rb', line 2335

def self.inherited(klass)
  %x{
    klass.$$prototype.$to_a = function() {
      return this.slice(0, this.length);
    }
  }
end

.try_convert(obj) ⇒ Object 



78
79
80
 
# File 'opal/opal/corelib/array.rb', line 78

def self.try_convert(obj)
  Opal.coerce_to? obj, Array, :to_ary
end

Instance Method Details

#&(other) ⇒ Object 



82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
 
# File 'opal/opal/corelib/array.rb', line 82

def &(other)
  other = if Array === other
            other.to_a
          else
            Opal.coerce_to(other, Array, :to_ary).to_a
          end

  %x{
    var result = [], hash = #{{}}, i, length, item;

    for (i = 0, length = other.length; i < length; i++) {
      Opal.hash_put(hash, other[i], true);
    }

    for (i = 0, length = self.length; i < length; i++) {
      item = self[i];
      if (Opal.hash_delete(hash, item) !== undefined) {
        result.push(item);
      }
    }

    return result;
  }
end

#*(other) ⇒ Object 



129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
 
# File 'opal/opal/corelib/array.rb', line 129

def *(other)
  return join(other.to_str) if other.respond_to? :to_str

  other = Opal.coerce_to other, Integer, :to_int

  if `other < 0`
    raise ArgumentError, 'negative argument'
  end

  %x{
    var result = [],
        converted = #{to_a};

    for (var i = 0; i < other; i++) {
      result = result.concat(converted);
    }

    return toArraySubclass(result, #{self.class});
  }
end

#+(other) ⇒ Object 



150
151
152
153
154
155
156
157
158
 
# File 'opal/opal/corelib/array.rb', line 150

def +(other)
  other = if Array === other
            other.to_a
          else
            Opal.coerce_to(other, Array, :to_ary).to_a
          end

  `self.concat(other)`
end

#-(other) ⇒ Object 



160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
 
# File 'opal/opal/corelib/array.rb', line 160

def -(other)
  other = if Array === other
            other.to_a
          else
            Opal.coerce_to(other, Array, :to_ary).to_a
          end

  return [] if `self.length === 0`
  return `self.slice()` if `other.length === 0`

  %x{
    var result = [], hash = #{{}}, i, length, item;

    for (i = 0, length = other.length; i < length; i++) {
      Opal.hash_put(hash, other[i], true);
    }

    for (i = 0, length = self.length; i < length; i++) {
      item = self[i];
      if (Opal.hash_get(hash, item) === undefined) {
        result.push(item);
      }
    }

    return result;
  }
end

#<<(object) ⇒ Object 



188
189
190
191
192
 
# File 'opal/opal/corelib/array.rb', line 188

def <<(object)
  `self.push(object)`

  self
end

#<=>(other) ⇒ Object 



194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
 
# File 'opal/opal/corelib/array.rb', line 194

def <=>(other)
  if Array === other
    other = other.to_a
  elsif other.respond_to? :to_ary
    other = other.to_ary.to_a
  else
    return
  end

  %x{
    if (#{hash} === #{other.hash}) {
      return 0;
    }

    var count = Math.min(self.length, other.length);

    for (var i = 0; i < count; i++) {
      var tmp = #{`self[i]` <=> `other[i]`};

      if (tmp !== 0) {
        return tmp;
      }
    }

    return #{`self.length` <=> `other.length`};
  }
end

#==(other) ⇒ Object 



222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
 
# File 'opal/opal/corelib/array.rb', line 222

def ==(other)
  %x{
    var recursed = {};

    function _eqeq(array, other) {
      var i, length, a, b;

      if (array === other)
        return true;

      if (!other.$$is_array) {
        if (#{Opal.respond_to? `other`, :to_ary}) {
          return #{`other` == `array`};
        } else {
          return false;
        }
      }

      if (array.$$constructor !== Array)
        array = #{`array`.to_a};
      if (other.$$constructor !== Array)
        other = #{`other`.to_a};

      if (array.length !== other.length) {
        return false;
      }

      recursed[#{`array`.object_id}] = true;

      for (i = 0, length = array.length; i < length; i++) {
        a = array[i];
        b = other[i];
        if (a.$$is_array) {
          if (b.$$is_array && b.length !== a.length) {
            return false;
          }
          if (!recursed.hasOwnProperty(#{`a`.object_id})) {
            if (!_eqeq(a, b)) {
              return false;
            }
          }
        } else {
          if (!#{`a` == `b`}) {
            return false;
          }
        }
      }

      return true;
    }

    return _eqeq(self, other);
  }
end

#[](index, length = undefined) ⇒ Object Also known as: slice 



348
349
350
351
352
353
354
355
356
357
 
# File 'opal/opal/corelib/array.rb', line 348

def [](index, length = undefined)
  %x{
    if (index.$$is_range) {
      return $array_slice_range(self, index);
    }
    else {
      return $array_slice_index_length(self, index, length);
    }
  }
end

#[]=(index, value, extra = undefined) ⇒ Object 



359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
 
# File 'opal/opal/corelib/array.rb', line 359

def []=(index, value, extra = undefined)
  %x{
    var i, size = self.length;
  }

  if Range === index
    data = if Array === value
             value.to_a
           elsif value.respond_to? :to_ary
             value.to_ary.to_a
           else
             [value]
           end

    %x{
      var exclude = index.excl,
          from    = #{Opal.coerce_to `index.begin`, Integer, :to_int},
          to      = #{Opal.coerce_to `index.end`, Integer, :to_int};

      if (from < 0) {
        from += size;

        if (from < 0) {
          #{raise RangeError, "#{index.inspect} out of range"};
        }
      }

      if (to < 0) {
        to += size;
      }

      if (!exclude) {
        to += 1;
      }

      if (from > size) {
        for (i = size; i < from; i++) {
          self[i] = nil;
        }
      }

      if (to < 0) {
        self.splice.apply(self, [from, 0].concat(data));
      }
      else {
        self.splice.apply(self, [from, to - from].concat(data));
      }

      return value;
    }
  else
    if `extra === undefined`
      length = 1
    else
      length = value
      value  = extra

      data = if Array === value
               value.to_a
             elsif value.respond_to? :to_ary
               value.to_ary.to_a
             else
               [value]
             end
    end

    %x{
      var old;

      index  = #{Opal.coerce_to index, Integer, :to_int};
      length = #{Opal.coerce_to length, Integer, :to_int};

      if (index < 0) {
        old    = index;
        index += size;

        if (index < 0) {
          #{raise IndexError, "index #{`old`} too small for array; minimum #{`-self.length`}"};
        }
      }

      if (length < 0) {
        #{raise IndexError, "negative length (#{length})"}
      }

      if (index > size) {
        for (i = size; i < index; i++) {
          self[i] = nil;
        }
      }

      if (extra === undefined) {
        self[index] = value;
      }
      else {
        self.splice.apply(self, [index, length].concat(data));
      }

      return value;
    }
  end
end

#__marshal__(buffer) ⇒ Object 



49
50
51
52
53
54
55
56
57
 
# File 'opal/opal/corelib/marshal/write_buffer.rb', line 49

def __marshal__(buffer)
  buffer.save_link(self)
  buffer.write_ivars_prefix(self)
  buffer.write_extends(self)
  buffer.write_user_class(Array, self)
  buffer.append('[')
  buffer.write_array(self)
  buffer.write_ivars_suffix(self)
end

#any?(pattern = undefined, &block) ⇒ Boolean

Returns:



462
463
464
465
 
# File 'opal/opal/corelib/array.rb', line 462

def any?(pattern = undefined, &block)
  `if (self.length === 0) return false`
  super
end

#assoc(object) ⇒ Object 



467
468
469
470
471
472
473
474
475
476
477
 
# File 'opal/opal/corelib/array.rb', line 467

def assoc(object)
  %x{
    for (var i = 0, length = self.length, item; i < length; i++) {
      if (item = self[i], item.length && #{`item[0]` == object}) {
        return item;
      }
    }

    return nil;
  }
end

#at(index) ⇒ Object 



479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
 
# File 'opal/opal/corelib/array.rb', line 479

def at(index)
  index = Opal.coerce_to index, Integer, :to_int

  %x{
    if (index < 0) {
      index += self.length;
    }

    if (index < 0 || index >= self.length) {
      return nil;
    }

    return self[index];
  }
end

#bsearch(&block) ⇒ Object 



534
535
536
537
538
539
540
541
542
543
544
545
546
 
# File 'opal/opal/corelib/array.rb', line 534

def bsearch(&block)
  return enum_for :bsearch unless block_given?

  index = bsearch_index(&block)

  %x{
    if (index != null && index.$$is_number) {
      return self[index];
    } else {
      return index;
    }
  }
end

#bsearch_index(&block) ⇒ Object 



495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
 
# File 'opal/opal/corelib/array.rb', line 495

def bsearch_index(&block)
  return enum_for :bsearch_index unless block_given?

  %x{
    var min = 0,
        max = self.length,
        mid,
        val,
        ret,
        smaller = false,
        satisfied = nil;

    while (min < max) {
      mid = min + Math.floor((max - min) / 2);
      val = self[mid];
      ret = Opal.yield1(block, val);

      if (ret === true) {
        satisfied = mid;
        smaller = true;
      }
      else if (ret === false || ret === nil) {
        smaller = false;
      }
      else if (ret.$$is_number) {
        if (ret === 0) { return mid; }
        smaller = (ret < 0);
      }
      else {
        #{raise TypeError, "wrong argument type #{`ret`.class} (must be numeric, true, false or nil)"}
      }

      if (smaller) { max = mid; } else { min = mid + 1; }
    }

    return satisfied;
  }
end

#clear ⇒ Object 



591
592
593
594
595
 
# File 'opal/opal/corelib/array.rb', line 591

def clear
  `self.splice(0, self.length)`

  self
end

#collect(&block) ⇒ Object Also known as: map 



609
610
611
612
613
614
615
616
617
618
619
620
621
622
 
# File 'opal/opal/corelib/array.rb', line 609

def collect(&block)
  return enum_for(:collect) { size } unless block_given?

  %x{
    var result = [];

    for (var i = 0, length = self.length; i < length; i++) {
      var value = Opal.yield1(block, self[i]);
      result.push(value);
    }

    return result;
  }
end

#collect!(&block) ⇒ Object Also known as: map! 



624
625
626
627
628
629
630
631
632
633
634
635
 
# File 'opal/opal/corelib/array.rb', line 624

def collect!(&block)
  return enum_for(:collect!) { size } unless block_given?

  %x{
    for (var i = 0, length = self.length; i < length; i++) {
      var value = Opal.yield1(block, self[i]);
      self[i] = value;
    }
  }

  self
end

#combination(n) ⇒ Object 



651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
 
# File 'opal/opal/corelib/array.rb', line 651

def combination(n)
  num = Opal.coerce_to! n, Integer, :to_int
  return enum_for(:combination, num) { `binomial_coefficient(#{self}.length, num)` } unless block_given?

  %x{
    var i, length, stack, chosen, lev, done, next;

    if (num === 0) {
      #{yield []}
    } else if (num === 1) {
      for (i = 0, length = self.length; i < length; i++) {
        #{yield `[self[i]]`}
      }
    }
    else if (num === self.length) {
      #{yield `self.slice()`}
    }
    else if (num >= 0 && num < self.length) {
      stack = [];
      for (i = 0; i <= num + 1; i++) {
        stack.push(0);
      }

      chosen = [];
      lev = 0;
      done = false;
      stack[0] = -1;

      while (!done) {
        chosen[lev] = self[stack[lev+1]];
        while (lev < num - 1) {
          lev++;
          next = stack[lev+1] = stack[lev] + 1;
          chosen[lev] = self[next];
        }
        #{ yield `chosen.slice()` }
        lev++;
        do {
          done = (lev === 0);
          stack[lev]++;
          lev--;
        } while ( stack[lev+1] + num === self.length + lev + 1 );
      }
    }
  }
  self
end

#compact ⇒ Object 



727
728
729
730
731
732
733
734
735
736
737
738
739
 
# File 'opal/opal/corelib/array.rb', line 727

def compact
  %x{
    var result = [];

    for (var i = 0, length = self.length, item; i < length; i++) {
      if ((item = self[i]) !== nil) {
        result.push(item);
      }
    }

    return result;
  }
end

#compact! ⇒ Object 



741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
 
# File 'opal/opal/corelib/array.rb', line 741

def compact!
  %x{
    var original = self.length;

    for (var i = 0, length = self.length; i < length; i++) {
      if (self[i] === nil) {
        self.splice(i, 1);

        length--;
        i--;
      }
    }

    return self.length === original ? nil : self;
  }
end

#concat(*others) ⇒ Object 



758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
 
# File 'opal/opal/corelib/array.rb', line 758

def concat(*others)
  others = others.map do |other|
    other = if Array === other
              other.to_a
            else
              Opal.coerce_to(other, Array, :to_ary).to_a
            end

    if other.equal?(self)
      other = other.dup
    end

    other
  end

  others.each do |other|
    %x{
      for (var i = 0, length = other.length; i < length; i++) {
        self.push(other[i]);
      }
    }
  end

  self
end

#count(object = nil, &block) ⇒ Object 



597
598
599
600
601
602
603
 
# File 'opal/opal/corelib/array.rb', line 597

def count(object = nil, &block)
  if object || block
    super
  else
    size
  end
end

#cycle(n = nil, &block) ⇒ Object 



548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
 
# File 'opal/opal/corelib/array.rb', line 548

def cycle(n = nil, &block)
  unless block_given?
    return enum_for(:cycle, n) do
      if n.nil?
        Float::INFINITY
      else
        n = Opal.coerce_to!(n, Integer, :to_int)
        n > 0 ? enumerator_size * n : 0
      end
    end
  end

  return if empty? || n == 0

  %x{
    var i, length, value;

    if (n === nil) {
      while (true) {
        for (i = 0, length = self.length; i < length; i++) {
          value = Opal.yield1(block, self[i]);
        }
      }
    }
    else {
      n = #{Opal.coerce_to!(n, Integer, :to_int)};
      if (n <= 0) {
        return self;
      }

      while (n > 0) {
        for (i = 0, length = self.length; i < length; i++) {
          value = Opal.yield1(block, self[i]);
        }

        n--;
      }
    }
  }

  self
end

#delete(object) ⇒ Object 



784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
 
# File 'opal/opal/corelib/array.rb', line 784

def delete(object)
  %x{
    var original = self.length;

    for (var i = 0, length = original; i < length; i++) {
      if (#{`self[i]` == object}) {
        self.splice(i, 1);

        length--;
        i--;
      }
    }

    if (self.length === original) {
      if (#{block_given?}) {
        return #{yield};
      }
      return nil;
    }
    return object;
  }
end

#delete_at(index) ⇒ Object 



807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
 
# File 'opal/opal/corelib/array.rb', line 807

def delete_at(index)
  %x{
    index = #{Opal.coerce_to `index`, Integer, :to_int};

    if (index < 0) {
      index += self.length;
    }

    if (index < 0 || index >= self.length) {
      return nil;
    }

    var result = self[index];

    self.splice(index, 1);

    return result;
  }
end

#delete_if(&block) ⇒ Object 



827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
 
# File 'opal/opal/corelib/array.rb', line 827

def delete_if(&block)
  return enum_for(:delete_if) { size } unless block_given?

  %x{
    for (var i = 0, length = self.length, value; i < length; i++) {
      value = block(self[i]);

      if (value !== false && value !== nil) {
        self.splice(i, 1);

        length--;
        i--;
      }
    }
  }

  self
end

#dig(idx, *idxs) ⇒ Object 



846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
 
# File 'opal/opal/corelib/array.rb', line 846

def dig(idx, *idxs)
  item = self[idx]

  %x{
    if (item === nil || idxs.length === 0) {
      return item;
    }
  }

  unless item.respond_to?(:dig)
    raise TypeError, "#{item.class} does not have #dig method"
  end

  item.dig(*idxs)
end

#drop(number) ⇒ Object 



862
863
864
865
866
867
868
869
870
 
# File 'opal/opal/corelib/array.rb', line 862

def drop(number)
  %x{
    if (number < 0) {
      #{raise ArgumentError}
    }

    return self.slice(number);
  }
end

#dup ⇒ Object 



872
873
874
875
876
877
878
879
880
881
882
883
 
# File 'opal/opal/corelib/array.rb', line 872

def dup
  %x{
    if (self.$$class === Opal.Array &&
        self.$$class.$allocate.$$pristine &&
        self.$copy_instance_variables.$$pristine &&
        self.$initialize_dup.$$pristine) {
      return self.slice(0);
    }
  }

  super
end

#each(&block) ⇒ Object 



885
886
887
888
889
890
891
892
893
894
895
 
# File 'opal/opal/corelib/array.rb', line 885

def each(&block)
  return enum_for(:each) { size } unless block_given?

  %x{
    for (var i = 0, length = self.length; i < length; i++) {
      var value = Opal.yield1(block, self[i]);
    }
  }

  self
end

#each_index(&block) ⇒ Object 



897
898
899
900
901
902
903
904
905
906
907
 
# File 'opal/opal/corelib/array.rb', line 897

def each_index(&block)
  return enum_for(:each_index) { size } unless block_given?

  %x{
    for (var i = 0, length = self.length; i < length; i++) {
      var value = Opal.yield1(block, i);
    }
  }

  self
end

#empty? ⇒ Boolean

Returns:



909
910
911
 
# File 'opal/opal/corelib/array.rb', line 909

def empty?
  `self.length === 0`
end

#eql?(other) ⇒ Boolean

Returns:



913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
 
# File 'opal/opal/corelib/array.rb', line 913

def eql?(other)
  %x{
    var recursed = {};

    function _eql(array, other) {
      var i, length, a, b;

      if (!other.$$is_array) {
        return false;
      }

      other = #{other.to_a};

      if (array.length !== other.length) {
        return false;
      }

      recursed[#{`array`.object_id}] = true;

      for (i = 0, length = array.length; i < length; i++) {
        a = array[i];
        b = other[i];
        if (a.$$is_array) {
          if (b.$$is_array && b.length !== a.length) {
            return false;
          }
          if (!recursed.hasOwnProperty(#{`a`.object_id})) {
            if (!_eql(a, b)) {
              return false;
            }
          }
        } else {
          if (!#{`a`.eql?(`b`)}) {
            return false;
          }
        }
      }

      return true;
    }

    return _eql(self, other);
  }
end

#fetch(index, defaults = undefined, &block) ⇒ Object 



958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
 
# File 'opal/opal/corelib/array.rb', line 958

def fetch(index, defaults = undefined, &block)
  %x{
    var original = index;

    index = #{Opal.coerce_to `index`, Integer, :to_int};

    if (index < 0) {
      index += self.length;
    }

    if (index >= 0 && index < self.length) {
      return self[index];
    }

    if (block !== nil && defaults != null) {
      #{warn('warning: block supersedes default value argument')}
    }

    if (block !== nil) {
      return block(original);
    }

    if (defaults != null) {
      return defaults;
    }

    if (self.length === 0) {
      #{raise IndexError, "index #{`original`} outside of array bounds: 0...0"}
    }
    else {
      #{raise IndexError, "index #{`original`} outside of array bounds: -#{`self.length`}...#{`self.length`}"};
    }
  }
end

#fill(*args, &block) ⇒ Object 



993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
 
# File 'opal/opal/corelib/array.rb', line 993

def fill(*args, &block)
  %x{
    var i, length, value;
  }

  if block
    if `args.length > 2`
      raise ArgumentError, "wrong number of arguments (#{args.length} for 0..2)"
    end

    one, two = args
  else
    if `args.length == 0`
      raise ArgumentError, 'wrong number of arguments (0 for 1..3)'
    elsif `args.length > 3`
      raise ArgumentError, "wrong number of arguments (#{args.length} for 1..3)"
    end

    obj, one, two = args
  end

  if Range === one
    raise TypeError, 'length invalid with range' if two

    left   = Opal.coerce_to one.begin, Integer, :to_int
    `left += this.length` if `left < 0`
    raise RangeError, "#{one.inspect} out of range" if `left < 0`

    right = Opal.coerce_to one.end, Integer, :to_int
    `right += this.length` if `right < 0`
    `right += 1` unless one.exclude_end?

    return self if `right <= left`
  elsif one
    left   = Opal.coerce_to one, Integer, :to_int
    `left += this.length` if `left < 0`
    left   = 0 if `left < 0`

    if two
      right = Opal.coerce_to two, Integer, :to_int

      return self if `right == 0`

      `right += left`
    else
      right = `this.length`
    end
  else
    left  = 0
    right = `this.length`
  end

  if `left > this.length`
    %x{
      for (i = this.length; i < right; i++) {
        self[i] = nil;
      }
    }
  end

  if `right > this.length`
    `this.length = right`
  end

  if block
    %x{
      for (length = this.length; left < right; left++) {
        value = block(left);
        self[left] = value;
      }
    }
  else
    %x{
      for (length = this.length; left < right; left++) {
        self[left] = #{obj};
      }
    }
  end

  self
end

#first(count = undefined) ⇒ Object 



1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
 
# File 'opal/opal/corelib/array.rb', line 1075

def first(count = undefined)
  %x{
    if (count == null) {
      return self.length === 0 ? nil : self[0];
    }

    count = #{Opal.coerce_to `count`, Integer, :to_int};

    if (count < 0) {
      #{raise ArgumentError, 'negative array size'};
    }

    return self.slice(0, count);
  }
end

#flatten(level = undefined) ⇒ Object 



1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
 
# File 'opal/opal/corelib/array.rb', line 1091

def flatten(level = undefined)
  %x{
    function _flatten(array, level) {
      var result = [],
          i, length,
          item, ary;

      array = #{`array`.to_a};

      for (i = 0, length = array.length; i < length; i++) {
        item = array[i];

        if (!#{Opal.respond_to? `item`, :to_ary, true}) {
          result.push(item);
          continue;
        }

        ary = #{`item`.to_ary};

        if (ary === nil) {
          result.push(item);
          continue;
        }

        if (!ary.$$is_array) {
          #{raise TypeError};
        }

        if (ary === self) {
          #{raise ArgumentError};
        }

        switch (level) {
        case undefined:
          result = result.concat(_flatten(ary));
          break;
        case 0:
          result.push(ary);
          break;
        default:
          result.push.apply(result, _flatten(ary, level - 1));
        }
      }
      return result;
    }

    if (level !== undefined) {
      level = #{Opal.coerce_to(`level`, Integer, :to_int)};
    }

    return toArraySubclass(_flatten(self, level), #{self.class});
  }
end

#flatten!(level = undefined) ⇒ Object 



1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
 
# File 'opal/opal/corelib/array.rb', line 1145

def flatten!(level = undefined)
  %x{
    var flattened = #{flatten level};

    if (self.length == flattened.length) {
      for (var i = 0, length = self.length; i < length; i++) {
        if (self[i] !== flattened[i]) {
          break;
        }
      }

      if (i == length) {
        return nil;
      }
    }

    #{replace `flattened`};
  }

  self
end

#hash ⇒ Object 



1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
 
# File 'opal/opal/corelib/array.rb', line 1167

def hash
  %x{
    var top = (Opal.hash_ids === undefined),
        result = ['A'],
        hash_id = self.$object_id(),
        item, i, key;

    try {
      if (top) {
        Opal.hash_ids = Object.create(null);
      }

      // return early for recursive structures
      if (Opal.hash_ids[hash_id]) {
        return 'self';
      }

      for (key in Opal.hash_ids) {
        item = Opal.hash_ids[key];
        if (#{eql?(`item`)}) {
          return 'self';
        }
      }

      Opal.hash_ids[hash_id] = self;

      for (i = 0; i < self.length; i++) {
        item = self[i];
        result.push(item.$hash());
      }

      return result.join(',');
    } finally {
      if (top) {
        Opal.hash_ids = undefined;
      }
    }
  }
end

#include?(member) ⇒ Boolean

Returns:



1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
 
# File 'opal/opal/corelib/array.rb', line 1207

def include?(member)
  %x{
    for (var i = 0, length = self.length; i < length; i++) {
      if (#{`self[i]` == member}) {
        return true;
      }
    }

    return false;
  }
end

#index(object = undefined, &block) ⇒ Object 



1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
 
# File 'opal/opal/corelib/array.rb', line 1219

def index(object = undefined, &block)
  %x{
    var i, length, value;

    if (object != null && block !== nil) {
      #{warn('warning: given block not used')}
    }

    if (object != null) {
      for (i = 0, length = self.length; i < length; i++) {
        if (#{`self[i]` == object}) {
          return i;
        }
      }
    }
    else if (block !== nil) {
      for (i = 0, length = self.length; i < length; i++) {
        value = block(self[i]);

        if (value !== false && value !== nil) {
          return i;
        }
      }
    }
    else {
      return #{enum_for :index};
    }

    return nil;
  }
end

#initialize_copy(other) ⇒ Object 



605
606
607
 
# File 'opal/opal/corelib/array.rb', line 605

def initialize_copy(other)
  replace other
end

#insert(index, *objects) ⇒ Object 



1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
 
# File 'opal/opal/corelib/array.rb', line 1251

def insert(index, *objects)
  %x{
    index = #{Opal.coerce_to `index`, Integer, :to_int};

    if (objects.length > 0) {
      if (index < 0) {
        index += self.length + 1;

        if (index < 0) {
          #{ raise IndexError, "#{index} is out of bounds" };
        }
      }
      if (index > self.length) {
        for (var i = self.length; i < index; i++) {
          self.push(nil);
        }
      }

      self.splice.apply(self, [index, 0].concat(objects));
    }
  }

  self
end

#inspect ⇒ Object Also known as: to_s 



1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
 
# File 'opal/opal/corelib/array.rb', line 1276

def inspect
  %x{
    var result = [],
        id     = #{__id__};

    for (var i = 0, length = self.length; i < length; i++) {
      var item = #{self[`i`]};

      if (#{`item`.__id__} === id) {
        result.push('[...]');
      }
      else {
        result.push(#{`item`.inspect});
      }
    }

    return '[' + result.join(', ') + ']';
  }
end

#instance_variables ⇒ Object 



2343
2344
2345
 
# File 'opal/opal/corelib/array.rb', line 2343

def instance_variables
  super.reject { |ivar| `/^@\d+$/.test(#{ivar})` || ivar == '@length' }
end

#join(sep = nil) ⇒ Object 



1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
 
# File 'opal/opal/corelib/array.rb', line 1296

def join(sep = nil)
  return '' if `self.length === 0`

  if `sep === nil`
    sep = $,
  end

  %x{
    var result = [];
    var i, length, item, tmp;

    for (i = 0, length = self.length; i < length; i++) {
      item = self[i];

      if (#{Opal.respond_to? `item`, :to_str}) {
        tmp = #{`item`.to_str};

        if (tmp !== nil) {
          result.push(#{`tmp`.to_s});

          continue;
        }
      }

      if (#{Opal.respond_to? `item`, :to_ary}) {
        tmp = #{`item`.to_ary};

        if (tmp === self) {
          #{raise ArgumentError};
        }

        if (tmp !== nil) {
          result.push(#{`tmp`.join(sep)});

          continue;
        }
      }

      if (#{Opal.respond_to? `item`, :to_s}) {
        tmp = #{`item`.to_s};

        if (tmp !== nil) {
          result.push(tmp);

          continue;
        }
      }

      #{raise NoMethodError.new("#{`Opal.inspect(item)`} doesn't respond to #to_str, #to_ary or #to_s", 'to_str')};
    }

    if (sep === nil) {
      return result.join('');
    }
    else {
      return result.join(#{Opal.coerce_to!(sep, String, :to_str).to_s});
    }
  }
end

#keep_if(&block) ⇒ Object 



1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
 
# File 'opal/opal/corelib/array.rb', line 1356

def keep_if(&block)
  return enum_for(:keep_if) { size } unless block_given?

  %x{
    for (var i = 0, length = self.length, value; i < length; i++) {
      value = block(self[i]);

      if (value === false || value === nil) {
        self.splice(i, 1);

        length--;
        i--;
      }
    }
  }

  self
end

#last(count = undefined) ⇒ Object 



1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
 
# File 'opal/opal/corelib/array.rb', line 1375

def last(count = undefined)
  %x{
    if (count == null) {
      return self.length === 0 ? nil : self[self.length - 1];
    }

    count = #{Opal.coerce_to `count`, Integer, :to_int};

    if (count < 0) {
      #{raise ArgumentError, 'negative array size'};
    }

    if (count > self.length) {
      count = self.length;
    }

    return self.slice(self.length - count, self.length);
  }
end

#length ⇒ Object Also known as: size 



1395
1396
1397
 
# File 'opal/opal/corelib/array.rb', line 1395

def length
  `self.length`
end

#max(n = undefined, &block) ⇒ Object 



1403
1404
1405
 
# File 'opal/opal/corelib/array.rb', line 1403

def max(n = undefined, &block)
  each.max(n, &block)
end

#min(&block) ⇒ Object 



1407
1408
1409
 
# File 'opal/opal/corelib/array.rb', line 1407

def min(&block)
  each.min(&block)
end

#pack(format) ⇒ Object 



2350
2351
2352
 
# File 'opal/opal/corelib/array.rb', line 2350

def pack(*args)
  raise "To use Array#pack, you must first require 'corelib/array/pack'."
end

#permutation(num = undefined, &block) ⇒ Object 



1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
 
# File 'opal/opal/corelib/array.rb', line 1424

def permutation(num = undefined, &block)
  unless block_given?
    return enum_for(:permutation, num) do
      `descending_factorial(self.length, num === undefined ? self.length : num)`
    end
  end

  %x{
    var permute, offensive, output;

    if (num === undefined) {
      num = self.length;
    }
    else {
      num = #{ Opal.coerce_to num, Integer, :to_int }
    }

    if (num < 0 || self.length < num) {
      // no permutations, yield nothing
    }
    else if (num === 0) {
      // exactly one permutation: the zero-length array
      #{ yield [] }
    }
    else if (num === 1) {
      // this is a special, easy case
      for (var i = 0; i < self.length; i++) {
        #{ yield `[self[i]]` }
      }
    }
    else {
      // this is the general case
      #{ perm = Array.new(num) };
      #{ used = Array.new(`self.length`, false) };

      permute = function(num, perm, index, used, blk) {
        self = this;
        for(var i = 0; i < self.length; i++){
          if(#{ !used[`i`] }) {
            perm[index] = i;
            if(index < num - 1) {
              used[i] = true;
              permute.call(self, num, perm, index + 1, used, blk);
              used[i] = false;
            }
            else {
              output = [];
              for (var j = 0; j < perm.length; j++) {
                output.push(self[perm[j]]);
              }
              Opal.yield1(blk, output);
            }
          }
        }
      }

      if (#{block_given?}) {
        // offensive (both definitions) copy.
        offensive = self.slice();
        permute.call(offensive, num, perm, 0, used, block);
      }
      else {
        permute.call(self, num, perm, 0, used, block);
      }
    }
  }

  self
end

#pop(count = undefined) ⇒ Object 



1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
 
# File 'opal/opal/corelib/array.rb', line 1518

def pop(count = undefined)
  if `count === undefined`
    return if `self.length === 0`
    return `self.pop()`
  end

  count = Opal.coerce_to count, Integer, :to_int

  if `count < 0`
    raise ArgumentError, 'negative array size'
  end

  return [] if `self.length === 0`

  if `count > self.length`
    `self.splice(0, self.length)`
  else
    `self.splice(self.length - count, self.length)`
  end
end

#product(*args, &block) ⇒ Object 



1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
 
# File 'opal/opal/corelib/array.rb', line 1539

def product(*args, &block)
  %x{
    var result = #{block_given?} ? null : [],
        n = args.length + 1,
        counters = new Array(n),
        lengths  = new Array(n),
        arrays   = new Array(n),
        i, m, subarray, len, resultlen = 1;

    arrays[0] = self;
    for (i = 1; i < n; i++) {
      arrays[i] = #{Opal.coerce_to(`args[i - 1]`, Array, :to_ary)};
    }

    for (i = 0; i < n; i++) {
      len = arrays[i].length;
      if (len === 0) {
        return result || self;
      }
      resultlen *= len;
      if (resultlen > 2147483647) {
        #{raise RangeError, 'too big to product'}
      }
      lengths[i] = len;
      counters[i] = 0;
    }

    outer_loop: for (;;) {
      subarray = [];
      for (i = 0; i < n; i++) {
        subarray.push(arrays[i][counters[i]]);
      }
      if (result) {
        result.push(subarray);
      } else {
        #{yield `subarray`}
      }
      m = n - 1;
      counters[m]++;
      while (counters[m] === lengths[m]) {
        counters[m] = 0;
        if (--m < 0) break outer_loop;
        counters[m]++;
      }
    }

    return result || self;
  }
end

#push(*objects) ⇒ Object Also known as: append 



1589
1590
1591
1592
1593
1594
1595
1596
1597
 
# File 'opal/opal/corelib/array.rb', line 1589

def push(*objects)
  %x{
    for (var i = 0, length = objects.length; i < length; i++) {
      self.push(objects[i]);
    }
  }

  self
end

#rassoc(object) ⇒ Object 



1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
 
# File 'opal/opal/corelib/array.rb', line 1601

def rassoc(object)
  %x{
    for (var i = 0, length = self.length, item; i < length; i++) {
      item = self[i];

      if (item.length && item[1] !== undefined) {
        if (#{`item[1]` == object}) {
          return item;
        }
      }
    }

    return nil;
  }
end

#reject(&block) ⇒ Object 



1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
 
# File 'opal/opal/corelib/array.rb', line 1617

def reject(&block)
  return enum_for(:reject) { size } unless block_given?

  %x{
    var result = [];

    for (var i = 0, length = self.length, value; i < length; i++) {
      value = block(self[i]);

      if (value === false || value === nil) {
        result.push(self[i]);
      }
    }
    return result;
  }
end

#reject!(&block) ⇒ Object 



1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
 
# File 'opal/opal/corelib/array.rb', line 1634

def reject!(&block)
  return enum_for(:reject!) { size } unless block_given?

  original = length
  delete_if(&block)

  unless length == original
    self
  end
end

#repeated_combination(n) ⇒ Object 



699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
 
# File 'opal/opal/corelib/array.rb', line 699

def repeated_combination(n)
  num = Opal.coerce_to! n, Integer, :to_int

  unless block_given?
    return enum_for(:repeated_combination, num) { `binomial_coefficient(self.length + num - 1, num)` }
  end

  %x{
    function iterate(max, from, buffer, self) {
      if (buffer.length == max) {
        var copy = buffer.slice();
        #{yield `copy`}
        return;
      }
      for (var i = from; i < self.length; i++) {
        buffer.push(self[i]);
        iterate(max, i, buffer, self);
        buffer.pop();
      }
    }

    if (num >= 0) {
      iterate(num, 0, [], self);
    }
  }
  self
end

#repeated_permutation(n) ⇒ Object 



1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
 
# File 'opal/opal/corelib/array.rb', line 1494

def repeated_permutation(n)
  num = Opal.coerce_to! n, Integer, :to_int
  return enum_for(:repeated_permutation, num) { num >= 0 ? size**num : 0 } unless block_given?

  %x{
    function iterate(max, buffer, self) {
      if (buffer.length == max) {
        var copy = buffer.slice();
        #{yield `copy`}
        return;
      }
      for (var i = 0; i < self.length; i++) {
        buffer.push(self[i]);
        iterate(max, buffer, self);
        buffer.pop();
      }
    }

    iterate(num, [], self.slice());
  }

  self
end

#replace(other) ⇒ Object 



1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
 
# File 'opal/opal/corelib/array.rb', line 1645

def replace(other)
  other = if Array === other
            other.to_a
          else
            Opal.coerce_to(other, Array, :to_ary).to_a
          end

  %x{
    self.splice(0, self.length);
    self.push.apply(self, other);
  }

  self
end

#reverse ⇒ Object 



1660
1661
1662
 
# File 'opal/opal/corelib/array.rb', line 1660

def reverse
  `self.slice(0).reverse()`
end

#reverse! ⇒ Object 



1664
1665
1666
 
# File 'opal/opal/corelib/array.rb', line 1664

def reverse!
  `self.reverse()`
end

#reverse_each(&block) ⇒ Object 



1668
1669
1670
1671
1672
1673
 
# File 'opal/opal/corelib/array.rb', line 1668

def reverse_each(&block)
  return enum_for(:reverse_each) { size } unless block_given?

  reverse.each(&block)
  self
end

#rindex(object = undefined, &block) ⇒ Object 



1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
 
# File 'opal/opal/corelib/array.rb', line 1675

def rindex(object = undefined, &block)
  %x{
    var i, value;

    if (object != null && block !== nil) {
      #{warn('warning: given block not used')}
    }

    if (object != null) {
      for (i = self.length - 1; i >= 0; i--) {
        if (i >= self.length) {
          break;
        }
        if (#{`self[i]` == `object`}) {
          return i;
        }
      }
    }
    else if (block !== nil) {
      for (i = self.length - 1; i >= 0; i--) {
        if (i >= self.length) {
          break;
        }

        value = block(self[i]);

        if (value !== false && value !== nil) {
          return i;
        }
      }
    }
    else if (object == null) {
      return #{enum_for :rindex};
    }

    return nil;
  }
end

#rotate(n = 1) ⇒ Object 



1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
 
# File 'opal/opal/corelib/array.rb', line 1714

def rotate(n = 1)
  n = Opal.coerce_to n, Integer, :to_int
  %x{
    var ary, idx, firstPart, lastPart;

    if (self.length === 1) {
      return self.slice();
    }
    if (self.length === 0) {
      return [];
    }

    ary = self.slice();
    idx = n % ary.length;

    firstPart = ary.slice(idx);
    lastPart = ary.slice(0, idx);
    return firstPart.concat(lastPart);
  }
end

#rotate!(cnt = 1) ⇒ Object 



1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
 
# File 'opal/opal/corelib/array.rb', line 1735

def rotate!(cnt = 1)
  %x{
    if (self.length === 0 || self.length === 1) {
      return self;
    }
  }
  cnt = Opal.coerce_to cnt, Integer, :to_int
  ary = rotate(cnt)
  replace ary
end

#sample(count = undefined, options = undefined) ⇒ Object 



1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
 
# File 'opal/opal/corelib/array.rb', line 1760

def sample(count = undefined, options = undefined)
  return at Kernel.rand(`self.length`) if `count === undefined`

  if `options === undefined`
    if (o = Opal.coerce_to? count, Hash, :to_hash)
      options = o
      count = nil
    else
      options = nil
      count = Opal.coerce_to count, Integer, :to_int
    end
  else
    count = Opal.coerce_to count, Integer, :to_int
    options = Opal.coerce_to options, Hash, :to_hash
  end

  if count && `count < 0`
    raise ArgumentError, 'count must be greater than 0'
  end

  rng = options[:random] if options
  rng = if rng && rng.respond_to?(:rand)
          SampleRandom.new rng
        else
          Kernel
        end

  return `self[#{rng.rand(`self.length`)}]` unless count

  %x{

    var abandon, spin, result, i, j, k, targetIndex, oldValue;

    if (count > self.length) {
      count = self.length;
    }

    switch (count) {
      case 0:
        return [];
        break;
      case 1:
        return [self[#{rng.rand(`self.length`)}]];
        break;
      case 2:
        i = #{rng.rand(`self.length`)};
        j = #{rng.rand(`self.length`)};
        if (i === j) {
          j = i === 0 ? i + 1 : i - 1;
        }
        return [self[i], self[j]];
        break;
      default:
        if (self.length / count > 3) {
          abandon = false;
          spin = 0;

          result = #{ Array.new(count) };
          i = 1;

          result[0] = #{rng.rand(`self.length`)};
          while (i < count) {
            k = #{rng.rand(`self.length`)};
            j = 0;

            while (j < i) {
              while (k === result[j]) {
                spin++;
                if (spin > 100) {
                  abandon = true;
                  break;
                }
                k = #{rng.rand(`self.length`)};
              }
              if (abandon) { break; }

              j++;
            }

            if (abandon) { break; }

            result[i] = k;

            i++;
          }

          if (!abandon) {
            i = 0;
            while (i < count) {
              result[i] = self[result[i]];
              i++;
            }

            return result;
          }
        }

        result = self.slice();

        for (var c = 0; c < count; c++) {
          targetIndex = #{rng.rand(`self.length`)};
          oldValue = result[c];
          result[c] = result[targetIndex];
          result[targetIndex] = oldValue;
        }

        return count === self.length ? result : #{`result`[0, count]};
    }
  }
end

#select(&block) ⇒ Object 



1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
 
# File 'opal/opal/corelib/array.rb', line 1871

def select(&block)
  return enum_for(:select) { size } unless block_given?

  %x{
    var result = [];

    for (var i = 0, length = self.length, item, value; i < length; i++) {
      item = self[i];

      value = Opal.yield1(block, item);

      if (Opal.truthy(value)) {
        result.push(item);
      }
    }

    return result;
  }
end

#select!(&block) ⇒ Object 



1891
1892
1893
1894
1895
1896
1897
1898
1899
 
# File 'opal/opal/corelib/array.rb', line 1891

def select!(&block)
  return enum_for(:select!) { size } unless block_given?

  %x{
    var original = self.length;
    #{ keep_if(&block) };
    return self.length === original ? nil : self;
  }
end

#shift(count = undefined) ⇒ Object 



1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
 
# File 'opal/opal/corelib/array.rb', line 1901

def shift(count = undefined)
  if `count === undefined`
    return if `self.length === 0`
    return `self.shift()`
  end

  count = Opal.coerce_to count, Integer, :to_int

  if `count < 0`
    raise ArgumentError, 'negative array size'
  end

  return [] if `self.length === 0`

  `self.splice(0, count)`
end

#shuffle(rng = undefined) ⇒ Object 



1920
1921
1922
 
# File 'opal/opal/corelib/array.rb', line 1920

def shuffle(rng = undefined)
  dup.to_a.shuffle!(rng)
end

#shuffle!(rng = undefined) ⇒ Object 



1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
 
# File 'opal/opal/corelib/array.rb', line 1924

def shuffle!(rng = undefined)
  %x{
    var randgen, i = self.length, j, tmp;

    if (rng !== undefined) {
      rng = #{Opal.coerce_to?(rng, Hash, :to_hash)};

      if (rng !== nil) {
        rng = #{rng[:random]};

        if (rng !== nil && #{rng.respond_to?(:rand)}) {
          randgen = rng;
        }
      }
    }

    while (i) {
      if (randgen) {
        j = randgen.$rand(i).$to_int();

        if (j < 0) {
          #{raise RangeError, "random number too small #{`j`}"}
        }

        if (j >= i) {
          #{raise RangeError, "random number too big #{`j`}"}
        }
      }
      else {
        j = #{rand(`i`)};
      }

      tmp = self[--i];
      self[i] = self[j];
      self[j] = tmp;
    }

    return self;
  }
end

#slice!(index, length = undefined) ⇒ Object 



1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
 
# File 'opal/opal/corelib/array.rb', line 1967

def slice!(index, length = undefined)
  result = nil

  if `length === undefined`
    if Range === index
      range = index
      result = self[range]

      range_start = Opal.coerce_to(range.begin, Integer, :to_int)
      range_end = Opal.coerce_to(range.end, Integer, :to_int)

      %x{
        if (range_start < 0) {
          range_start += self.length;
        }

        if (range_end < 0) {
          range_end += self.length;
        } else if (range_end >= self.length) {
          range_end = self.length - 1;
          if (range.excl) {
            range_end += 1;
          }
        }

        var range_length = range_end - range_start;
        if (range.excl) {
          range_end -= 1;
        } else {
          range_length += 1;
        }

        if (range_start < self.length && range_start >= 0 && range_end < self.length && range_end >= 0 && range_length > 0) {
          self.splice(range_start, range_length);
        }
      }
    else
      start = Opal.coerce_to(index, Integer, :to_int)
      %x{
        if (start < 0) {
          start += self.length;
        }

        if (start < 0 || start >= self.length) {
          return nil;
        }

        result = self[start];

        if (start === 0) {
          self.shift();
        } else {
          self.splice(start, 1);
        }
      }
    end
  else
    start = Opal.coerce_to(index, Integer, :to_int)
    length = Opal.coerce_to(length, Integer, :to_int)

    %x{
      if (length < 0) {
        return nil;
      }

      var end = start + length;

      result = #{self[start, length]};

      if (start < 0) {
        start += self.length;
      }

      if (start + length > self.length) {
        length = self.length - start;
      }

      if (start < self.length && start >= 0) {
        self.splice(start, length);
      }
    }
  end
  result
end

#sort(&block) ⇒ Object 



2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
 
# File 'opal/opal/corelib/array.rb', line 2052

def sort(&block)
  return self unless `self.length > 1`

  %x{
    if (block === nil) {
      block = function(a, b) {
        return #{`a` <=> `b`};
      };
    }

    return self.slice().sort(function(x, y) {
      var ret = block(x, y);

      if (ret === nil) {
        #{raise ArgumentError, "comparison of #{`x`.inspect} with #{`y`.inspect} failed"};
      }

      return #{`ret` > 0} ? 1 : (#{`ret` < 0} ? -1 : 0);
    });
  }
end

#sort!(&block) ⇒ Object 



2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
 
# File 'opal/opal/corelib/array.rb', line 2074

def sort!(&block)
  %x{
    var result;

    if (#{block_given?}) {
      result = #{`self.slice()`.sort(&block)};
    }
    else {
      result = #{`self.slice()`.sort};
    }

    self.length = 0;
    for(var i = 0, length = result.length; i < length; i++) {
      self.push(result[i]);
    }

    return self;
  }
end

#sort_by!(&block) ⇒ Object 



2094
2095
2096
2097
2098
 
# File 'opal/opal/corelib/array.rb', line 2094

def sort_by!(&block)
  return enum_for(:sort_by!) { size } unless block_given?

  replace sort_by(&block)
end

#take(count) ⇒ Object 



2100
2101
2102
2103
2104
2105
2106
2107
2108
 
# File 'opal/opal/corelib/array.rb', line 2100

def take(count)
  %x{
    if (count < 0) {
      #{raise ArgumentError};
    }

    return self.slice(0, count);
  }
end

#take_while(&block) ⇒ Object 



2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
 
# File 'opal/opal/corelib/array.rb', line 2110

def take_while(&block)
  %x{
    var result = [];

    for (var i = 0, length = self.length, item, value; i < length; i++) {
      item = self[i];

      value = block(item);

      if (value === false || value === nil) {
        return result;
      }

      result.push(item);
    }

    return result;
  }
end

#to_a ⇒ Object Also known as: to_ary 



2130
2131
2132
 
# File 'opal/opal/corelib/array.rb', line 2130

def to_a
  self
end

#to_h ⇒ Object 



2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
 
# File 'opal/opal/corelib/array.rb', line 2136

def to_h
  %x{
    var i, len = self.length, ary, key, val, hash = #{{}};

    for (i = 0; i < len; i++) {
      ary = #{Opal.coerce_to?(`self[i]`, Array, :to_ary)};
      if (!ary.$$is_array) {
        #{raise TypeError, "wrong element type #{`ary`.class} at #{`i`} (expected array)"}
      }
      if (ary.length !== 2) {
        #{raise ArgumentError, "wrong array length at #{`i`} (expected 2, was #{`ary`.length})"}
      }
      key = ary[0];
      val = ary[1];
      Opal.hash_put(hash, key, val);
    }

    return hash;
  }
end

#transpose ⇒ Object 



2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
 
# File 'opal/opal/corelib/array.rb', line 2159

def transpose
  return [] if empty?

  result = []
  max    = nil

  each do |row|
    row = if Array === row
            row.to_a
          else
            Opal.coerce_to(row, Array, :to_ary).to_a
          end

    max ||= `row.length`

    if `row.length` != max
      raise IndexError, "element size differs (#{`row.length`} should be #{max})"
    end

    `row.length`.times do |i|
      entry = (result[i] ||= [])
      entry << row.at(i)
    end
  end

  result
end

#uniq(&block) ⇒ Object 



2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
 
# File 'opal/opal/corelib/array.rb', line 2187

def uniq(&block)
  %x{
    var hash = #{{}}, i, length, item, key;

    if (block === nil) {
      for (i = 0, length = self.length; i < length; i++) {
        item = self[i];
        if (Opal.hash_get(hash, item) === undefined) {
          Opal.hash_put(hash, item, item);
        }
      }
    }
    else {
      for (i = 0, length = self.length; i < length; i++) {
        item = self[i];
        key = Opal.yield1(block, item);
        if (Opal.hash_get(hash, key) === undefined) {
          Opal.hash_put(hash, key, item);
        }
      }
    }

    return toArraySubclass(#{`hash`.values}, #{self.class});
  }
end

#uniq!(&block) ⇒ Object 



2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
 
# File 'opal/opal/corelib/array.rb', line 2213

def uniq!(&block)
  %x{
    var original_length = self.length, hash = #{{}}, i, length, item, key;

    for (i = 0, length = original_length; i < length; i++) {
      item = self[i];
      key = (block === nil ? item : Opal.yield1(block, item));

      if (Opal.hash_get(hash, key) === undefined) {
        Opal.hash_put(hash, key, item);
        continue;
      }

      self.splice(i, 1);
      length--;
      i--;
    }

    return self.length === original_length ? nil : self;
  }
end

#unshift(*objects) ⇒ Object Also known as: prepend 



2235
2236
2237
2238
2239
2240
2241
2242
2243
 
# File 'opal/opal/corelib/array.rb', line 2235

def unshift(*objects)
  %x{
    for (var i = objects.length - 1; i >= 0; i--) {
      self.unshift(objects[i]);
    }
  }

  self
end

#values_at(*args) ⇒ Object 



2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
 
# File 'opal/opal/corelib/array.rb', line 2247

def values_at(*args)
  out = []

  args.each do |elem|
    if elem.is_a? Range
      finish = Opal.coerce_to elem.last, Integer, :to_int
      start = Opal.coerce_to elem.first, Integer, :to_int

      %x{
        if (start < 0) {
          start = start + self.length;
          #{next};
        }
      }

      %x{
        if (finish < 0) {
          finish = finish + self.length;
        }
        if (#{elem.exclude_end?}) {
          finish--;
        }
        if (finish < start) {
          #{next};
        }
      }

      start.upto(finish) { |i| out << at(i) }
    else
      i = Opal.coerce_to elem, Integer, :to_int
      out << at(i)
    end
  end

  out
end

#zip(*others, &block) ⇒ Object 



2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
 
# File 'opal/opal/corelib/array.rb', line 2284

def zip(*others, &block)
  %x{
    var result = [], size = self.length, part, o, i, j, jj;

    for (j = 0, jj = others.length; j < jj; j++) {
      o = others[j];
      if (o.$$is_array) {
        continue;
      }
      if (o.$$is_enumerator) {
        if (o.$size() === Infinity) {
          others[j] = o.$take(size);
        } else {
          others[j] = o.$to_a();
        }
        continue;
      }
      others[j] = #{(
        Opal.coerce_to?(`o`, Array, :to_ary) ||
        Opal.coerce_to!(`o`, Enumerator, :each)
      ).to_a};
    }

    for (i = 0; i < size; i++) {
      part = [self[i]];

      for (j = 0, jj = others.length; j < jj; j++) {
        o = others[j][i];

        if (o == null) {
          o = nil;
        }

        part[j + 1] = o;
      }

      result[i] = part;
    }

    if (block !== nil) {
      for (i = 0; i < size; i++) {
        block(result[i]);
      }

      return nil;
    }

    return result;
  }
end

#|(other) ⇒ Object 



107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
 
# File 'opal/opal/corelib/array.rb', line 107

def |(other)
  other = if Array === other
            other.to_a
          else
            Opal.coerce_to(other, Array, :to_ary).to_a
          end

  %x{
    var hash = #{{}}, i, length, item;

    for (i = 0, length = self.length; i < length; i++) {
      Opal.hash_put(hash, self[i], true);
    }

    for (i = 0, length = other.length; i < length; i++) {
      Opal.hash_put(hash, other[i], true);
    }

    return hash.$keys();
  }
end