Module: Kernel

Defined in:
opal/opal/corelib/kernel.rb

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(symbol, *args, &block) ⇒ Object

Raises:



2
3
4
 
# File 'opal/opal/corelib/kernel.rb', line 2

def method_missing(symbol, *args, &block)
  raise NoMethodError, "undefined method `#{symbol}' for #{inspect}"
end

Instance Method Details

#<=>(other) ⇒ Object 



14
15
16
17
18
19
20
21
22
23
24
 
# File 'opal/opal/corelib/kernel.rb', line 14

def <=>(other)
  %x{
    var x = #{self == other};

    if (x && x !== nil) {
      return 0;
    }

    return nil;
  }
end

#===(other) ⇒ Object 



10
11
12
 
# File 'opal/opal/corelib/kernel.rb', line 10

def ===(other)
  self.object_id == other.object_id || self == other
end

#=~(obj) ⇒ Object 



6
7
8
 
# File 'opal/opal/corelib/kernel.rb', line 6

def =~(obj)
  false
end

#Array(object) ⇒ Object 



59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
 
# File 'opal/opal/corelib/kernel.rb', line 59

def Array(object)
  %x{
    var coerced;

    if (object === nil) {
      return [];
    }

    if (object.$$is_array) {
      return object;
    }

    coerced = #{Opal.coerce_to?(object, Array, :to_ary)};
    if (coerced !== nil) { return coerced; }

    coerced = #{Opal.coerce_to?(object, Array, :to_a)};
    if (coerced !== nil) { return coerced; }

    return [object];
  }
end

#at_exit(&block) ⇒ Object 



81
82
83
84
 
# File 'opal/opal/corelib/kernel.rb', line 81

def at_exit(&block)
  $__at_exit__ ||= []
  $__at_exit__ << block
end

#caller ⇒ Object

Opal does not support #caller, but we stub it as an empty array to not break dependant libs



88
89
90
 
# File 'opal/opal/corelib/kernel.rb', line 88

def caller
  []
end

#class ⇒ Object 



92
93
94
 
# File 'opal/opal/corelib/kernel.rb', line 92

def class
  `self.$$class`
end

#clone ⇒ Object 



106
107
108
109
110
111
112
113
 
# File 'opal/opal/corelib/kernel.rb', line 106

def clone
  copy = self.class.allocate

  copy.copy_instance_variables(self)
  copy.initialize_clone(self)

  copy
end

#copy_instance_variables(other) ⇒ Object 



96
97
98
99
100
101
102
103
104
 
# File 'opal/opal/corelib/kernel.rb', line 96

def copy_instance_variables(other)
  %x{
    for (var name in other) {
      if (name.charAt(0) !== '$') {
        self[name] = other[name];
      }
    }
  }
end

#define_singleton_method(name, body = nil, &block) ⇒ Object 



119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
 
# File 'opal/opal/corelib/kernel.rb', line 119

def define_singleton_method(name, body = nil, &block)
  body ||= block

  unless body
    raise ArgumentError, "tried to create Proc object without a block"
  end

  %x{
    var jsid   = '$' + name;
    body.$$jsid = name;
    body.$$s    = null;
    body.$$def  = body;

    #{singleton_class}.$$proto[jsid] = body;

    return self;
  }
end

#dup ⇒ Object 



138
139
140
141
142
143
144
145
 
# File 'opal/opal/corelib/kernel.rb', line 138

def dup
  copy = self.class.allocate

  copy.copy_instance_variables(self)
  copy.initialize_dup(self)

  copy
end

#enum_for(method = :each, *args, &block) ⇒ Object Also known as: to_enum 



151
152
153
 
# File 'opal/opal/corelib/kernel.rb', line 151

def enum_for(method = :each, *args, &block)
  Enumerator.for(self, method, *args, &block)
end

#equal?(other) ⇒ Boolean

Returns:



157
158
159
 
# File 'opal/opal/corelib/kernel.rb', line 157

def equal?(other)
  `self === other`
end

#exit(status = true) ⇒ Object 



161
162
163
164
165
166
 
# File 'opal/opal/corelib/kernel.rb', line 161

def exit(status = true)
  $__at_exit__.reverse.each(&:call) if $__at_exit__
  status = 0 if `status === true` # it's in JS because it can be null/undef
  `Opal.exit(status);`
  nil
end

#extend(*mods) ⇒ Object 



168
169
170
171
172
173
174
175
176
177
178
179
180
181
 
# File 'opal/opal/corelib/kernel.rb', line 168

def extend(*mods)
  %x{
    var singleton = #{singleton_class};

    for (var i = mods.length - 1; i >= 0; i--) {
      var mod = mods[i];

      #{`mod`.append_features `singleton`};
      #{`mod`.extended self};
    }
  }

  self
end

#Float(value) ⇒ Object 



864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
 
# File 'opal/opal/corelib/kernel.rb', line 864

def Float(value)
  %x{
    var str;

    if (value === nil) {
      #{raise TypeError, "can't convert nil into Float"}
    }

    if (value.$$is_string) {
      str = value.toString();

      str = str.replace(/(\d)_(?=\d)/g, '$1');

      //Special case for hex strings only:
      if (/^\s*[-+]?0[xX][0-9a-fA-F]+\s*$/.test(str)) {
        return #{Integer(`str`)};
      }

      if (!/^\s*[-+]?[0-9]*\.?[0-9]+([eE][-+]?[0-9]+)?\s*$/.test(str)) {
        #{raise ArgumentError, "invalid value for Float(): \"#{value}\""}
      }

      return parseFloat(str);
    }

    return #{Opal.coerce_to!(value, Float, :to_f)};
  }
end

#format(format_string, *args) ⇒ Object Also known as: sprintf 



183
184
185
186
187
188
189
190
191
192
193
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
221
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
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
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
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
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
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
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
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
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
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
 
# File 'opal/opal/corelib/kernel.rb', line 183

def format(format_string, *args)
  if args.length == 1 && args[0].respond_to?(:to_ary)
    ary = Opal.coerce_to?(args[0], Array, :to_ary)
    args = ary.to_a unless ary.nil?
  end

  %x{
    var result = '',
        //used for slicing:
        begin_slice = 0,
        end_slice,
        //used for iterating over the format string:
        i,
        len = format_string.length,
        //used for processing field values:
        arg,
        str,
        //used for processing %g and %G fields:
        exponent,
        //used for keeping track of width and precision:
        width,
        precision,
        //used for holding temporary values:
        tmp_num,
        //used for processing %{} and %<> fileds:
        hash_parameter_key,
        closing_brace_char,
        //used for processing %b, %B, %o, %x, and %X fields:
        base_number,
        base_prefix,
        base_neg_zero_regex,
        base_neg_zero_digit,
        //used for processing arguments:
        next_arg,
        seq_arg_num = 1,
        pos_arg_num = 0,
        //used for keeping track of flags:
        flags,
        FNONE  = 0,
        FSHARP = 1,
        FMINUS = 2,
        FPLUS  = 4,
        FZERO  = 8,
        FSPACE = 16,
        FWIDTH = 32,
        FPREC  = 64,
        FPREC0 = 128;

    function CHECK_FOR_FLAGS() {
      if (flags&FWIDTH) { #{raise ArgumentError, 'flag after width'} }
      if (flags&FPREC0) { #{raise ArgumentError, 'flag after precision'} }
    }

    function CHECK_FOR_WIDTH() {
      if (flags&FWIDTH) { #{raise ArgumentError, 'width given twice'} }
      if (flags&FPREC0) { #{raise ArgumentError, 'width after precision'} }
    }

    function GET_NTH_ARG(num) {
      if (num >= args.length) { #{raise ArgumentError, 'too few arguments'} }
      return args[num];
    }

    function GET_NEXT_ARG() {
      switch (pos_arg_num) {
      case -1: #{raise ArgumentError, "unnumbered(#{`seq_arg_num`}) mixed with numbered"}
      case -2: #{raise ArgumentError, "unnumbered(#{`seq_arg_num`}) mixed with named"}
      }
      pos_arg_num = seq_arg_num++;
      return GET_NTH_ARG(pos_arg_num - 1);
    }

    function GET_POS_ARG(num) {
      if (pos_arg_num > 0) {
        #{raise ArgumentError, "numbered(#{`num`}) after unnumbered(#{`pos_arg_num`})"}
      }
      if (pos_arg_num === -2) {
        #{raise ArgumentError, "numbered(#{`num`}) after named"}
      }
      if (num < 1) {
        #{raise ArgumentError, "invalid index - #{`num`}$"}
      }
      pos_arg_num = -1;
      return GET_NTH_ARG(num - 1);
    }

    function GET_ARG() {
      return (next_arg === undefined ? GET_NEXT_ARG() : next_arg);
    }

    function READ_NUM(label) {
      var num, str = '';
      for (;; i++) {
        if (i === len) {
          #{raise ArgumentError, 'malformed format string - %*[0-9]'}
        }
        if (format_string.charCodeAt(i) < 48 || format_string.charCodeAt(i) > 57) {
          i--;
          num = parseInt(str) || 0;
          if (num > 2147483647) {
            #{raise ArgumentError, "#{`label`} too big"}
          }
          return num;
        }
        str += format_string.charAt(i);
      }
    }

    function READ_NUM_AFTER_ASTER(label) {
      var arg, num = READ_NUM(label);
      if (format_string.charAt(i + 1) === '$') {
        i++;
        arg = GET_POS_ARG(num);
      } else {
        arg = GET_NEXT_ARG();
      }
      return #{`arg`.to_int};
    }

    for (i = format_string.indexOf('%'); i !== -1; i = format_string.indexOf('%', i)) {
      str = undefined;

      flags = FNONE;
      width = -1;
      precision = -1;
      next_arg = undefined;

      end_slice = i;

      i++;

      switch (format_string.charAt(i)) {
      case '%':
        begin_slice = i;
      case '':
      case '\n':
      case '\0':
        i++;
        continue;
      }

      format_sequence: for (; i < len; i++) {
        switch (format_string.charAt(i)) {

        case ' ':
          CHECK_FOR_FLAGS();
          flags |= FSPACE;
          continue format_sequence;

        case '#':
          CHECK_FOR_FLAGS();
          flags |= FSHARP;
          continue format_sequence;

        case '+':
          CHECK_FOR_FLAGS();
          flags |= FPLUS;
          continue format_sequence;

        case '-':
          CHECK_FOR_FLAGS();
          flags |= FMINUS;
          continue format_sequence;

        case '0':
          CHECK_FOR_FLAGS();
          flags |= FZERO;
          continue format_sequence;

        case '1':
        case '2':
        case '3':
        case '4':
        case '5':
        case '6':
        case '7':
        case '8':
        case '9':
          tmp_num = READ_NUM('width');
          if (format_string.charAt(i + 1) === '$') {
            if (i + 2 === len) {
              str = '%';
              i++;
              break format_sequence;
            }
            if (next_arg !== undefined) {
              #{raise ArgumentError, "value given twice - %#{`tmp_num`}$"}
            }
            next_arg = GET_POS_ARG(tmp_num);
            i++;
          } else {
            CHECK_FOR_WIDTH();
            flags |= FWIDTH;
            width = tmp_num;
          }
          continue format_sequence;

        case '<':
        case '\{':
          closing_brace_char = (format_string.charAt(i) === '<' ? '>' : '\}');
          hash_parameter_key = '';

          i++;

          for (;; i++) {
            if (i === len) {
              #{raise ArgumentError, 'malformed name - unmatched parenthesis'}
            }
            if (format_string.charAt(i) === closing_brace_char) {

              if (pos_arg_num > 0) {
                #{raise ArgumentError, "named #{`hash_parameter_key`} after unnumbered(#{`pos_arg_num`})"}
              }
              if (pos_arg_num === -1) {
                #{raise ArgumentError, "named #{`hash_parameter_key`} after numbered"}
              }
              pos_arg_num = -2;

              if (args[0] === undefined || !args[0].$$is_hash) {
                #{raise ArgumentError, 'one hash required'}
              }

              next_arg = #{`args[0]`.fetch(`hash_parameter_key`)};

              if (closing_brace_char === '>') {
                continue format_sequence;
              } else {
                str = next_arg.toString();
                if (precision !== -1) { str = str.slice(0, precision); }
                if (flags&FMINUS) {
                  while (str.length < width) { str = str + ' '; }
                } else {
                  while (str.length < width) { str = ' ' + str; }
                }
                break format_sequence;
              }
            }
            hash_parameter_key += format_string.charAt(i);
          }

        case '*':
          i++;
          CHECK_FOR_WIDTH();
          flags |= FWIDTH;
          width = READ_NUM_AFTER_ASTER('width');
          if (width < 0) {
            flags |= FMINUS;
            width = -width;
          }
          continue format_sequence;

        case '.':
          if (flags&FPREC0) {
            #{raise ArgumentError, 'precision given twice'}
          }
          flags |= FPREC|FPREC0;
          precision = 0;
          i++;
          if (format_string.charAt(i) === '*') {
            i++;
            precision = READ_NUM_AFTER_ASTER('precision');
            if (precision < 0) {
              flags &= ~FPREC;
            }
            continue format_sequence;
          }
          precision = READ_NUM('precision');
          continue format_sequence;

        case 'd':
        case 'i':
        case 'u':
          arg = #{Integer(`GET_ARG()`)};
          if (arg >= 0) {
            str = arg.toString();
            while (str.length < precision) { str = '0' + str; }
            if (flags&FMINUS) {
              if (flags&FPLUS || flags&FSPACE) { str = (flags&FPLUS ? '+' : ' ') + str; }
              while (str.length < width) { str = str + ' '; }
            } else {
              if (flags&FZERO && precision === -1) {
                while (str.length < width - ((flags&FPLUS || flags&FSPACE) ? 1 : 0)) { str = '0' + str; }
                if (flags&FPLUS || flags&FSPACE) { str = (flags&FPLUS ? '+' : ' ') + str; }
              } else {
                if (flags&FPLUS || flags&FSPACE) { str = (flags&FPLUS ? '+' : ' ') + str; }
                while (str.length < width) { str = ' ' + str; }
              }
            }
          } else {
            str = (-arg).toString();
            while (str.length < precision) { str = '0' + str; }
            if (flags&FMINUS) {
              str = '-' + str;
              while (str.length < width) { str = str + ' '; }
            } else {
              if (flags&FZERO && precision === -1) {
                while (str.length < width - 1) { str = '0' + str; }
                str = '-' + str;
              } else {
                str = '-' + str;
                while (str.length < width) { str = ' ' + str; }
              }
            }
          }
          break format_sequence;

        case 'b':
        case 'B':
        case 'o':
        case 'x':
        case 'X':
          switch (format_string.charAt(i)) {
          case 'b':
          case 'B':
            base_number = 2;
            base_prefix = '0b';
            base_neg_zero_regex = /^1+/;
            base_neg_zero_digit = '1';
            break;
          case 'o':
            base_number = 8;
            base_prefix = '0';
            base_neg_zero_regex = /^3?7+/;
            base_neg_zero_digit = '7';
            break;
          case 'x':
          case 'X':
            base_number = 16;
            base_prefix = '0x';
            base_neg_zero_regex = /^f+/;
            base_neg_zero_digit = 'f';
            break;
          }
          arg = #{Integer(`GET_ARG()`)};
          if (arg >= 0) {
            str = arg.toString(base_number);
            while (str.length < precision) { str = '0' + str; }
            if (flags&FMINUS) {
              if (flags&FPLUS || flags&FSPACE) { str = (flags&FPLUS ? '+' : ' ') + str; }
              if (flags&FSHARP && arg !== 0) { str = base_prefix + str; }
              while (str.length < width) { str = str + ' '; }
            } else {
              if (flags&FZERO && precision === -1) {
                while (str.length < width - ((flags&FPLUS || flags&FSPACE) ? 1 : 0) - ((flags&FSHARP && arg !== 0) ? base_prefix.length : 0)) { str = '0' + str; }
                if (flags&FSHARP && arg !== 0) { str = base_prefix + str; }
                if (flags&FPLUS || flags&FSPACE) { str = (flags&FPLUS ? '+' : ' ') + str; }
              } else {
                if (flags&FSHARP && arg !== 0) { str = base_prefix + str; }
                if (flags&FPLUS || flags&FSPACE) { str = (flags&FPLUS ? '+' : ' ') + str; }
                while (str.length < width) { str = ' ' + str; }
              }
            }
          } else {
            if (flags&FPLUS || flags&FSPACE) {
              str = (-arg).toString(base_number);
              while (str.length < precision) { str = '0' + str; }
              if (flags&FMINUS) {
                if (flags&FSHARP) { str = base_prefix + str; }
                str = '-' + str;
                while (str.length < width) { str = str + ' '; }
              } else {
                if (flags&FZERO && precision === -1) {
                  while (str.length < width - 1 - (flags&FSHARP ? 2 : 0)) { str = '0' + str; }
                  if (flags&FSHARP) { str = base_prefix + str; }
                  str = '-' + str;
                } else {
                  if (flags&FSHARP) { str = base_prefix + str; }
                  str = '-' + str;
                  while (str.length < width) { str = ' ' + str; }
                }
              }
            } else {
              str = (arg >>> 0).toString(base_number).replace(base_neg_zero_regex, base_neg_zero_digit);
              while (str.length < precision - 2) { str = base_neg_zero_digit + str; }
              if (flags&FMINUS) {
                str = '..' + str;
                if (flags&FSHARP) { str = base_prefix + str; }
                while (str.length < width) { str = str + ' '; }
              } else {
                if (flags&FZERO && precision === -1) {
                  while (str.length < width - 2 - (flags&FSHARP ? base_prefix.length : 0)) { str = base_neg_zero_digit + str; }
                  str = '..' + str;
                  if (flags&FSHARP) { str = base_prefix + str; }
                } else {
                  str = '..' + str;
                  if (flags&FSHARP) { str = base_prefix + str; }
                  while (str.length < width) { str = ' ' + str; }
                }
              }
            }
          }
          if (format_string.charAt(i) === format_string.charAt(i).toUpperCase()) {
            str = str.toUpperCase();
          }
          break format_sequence;

        case 'f':
        case 'e':
        case 'E':
        case 'g':
        case 'G':
          arg = #{Float(`GET_ARG()`)};
          if (arg >= 0 || isNaN(arg)) {
            if (arg === Infinity) {
              str = 'Inf';
            } else {
              switch (format_string.charAt(i)) {
              case 'f':
                str = arg.toFixed(precision === -1 ? 6 : precision);
                break;
              case 'e':
              case 'E':
                str = arg.toExponential(precision === -1 ? 6 : precision);
                break;
              case 'g':
              case 'G':
                str = arg.toExponential();
                exponent = parseInt(str.split('e')[1]);
                if (!(exponent < -4 || exponent >= (precision === -1 ? 6 : precision))) {
                  str = arg.toPrecision(precision === -1 ? (flags&FSHARP ? 6 : undefined) : precision);
                }
                break;
              }
            }
            if (flags&FMINUS) {
              if (flags&FPLUS || flags&FSPACE) { str = (flags&FPLUS ? '+' : ' ') + str; }
              while (str.length < width) { str = str + ' '; }
            } else {
              if (flags&FZERO && arg !== Infinity && !isNaN(arg)) {
                while (str.length < width - ((flags&FPLUS || flags&FSPACE) ? 1 : 0)) { str = '0' + str; }
                if (flags&FPLUS || flags&FSPACE) { str = (flags&FPLUS ? '+' : ' ') + str; }
              } else {
                if (flags&FPLUS || flags&FSPACE) { str = (flags&FPLUS ? '+' : ' ') + str; }
                while (str.length < width) { str = ' ' + str; }
              }
            }
          } else {
            if (arg === -Infinity) {
              str = 'Inf';
            } else {
              switch (format_string.charAt(i)) {
              case 'f':
                str = (-arg).toFixed(precision === -1 ? 6 : precision);
                break;
              case 'e':
              case 'E':
                str = (-arg).toExponential(precision === -1 ? 6 : precision);
                break;
              case 'g':
              case 'G':
                str = (-arg).toExponential();
                exponent = parseInt(str.split('e')[1]);
                if (!(exponent < -4 || exponent >= (precision === -1 ? 6 : precision))) {
                  str = (-arg).toPrecision(precision === -1 ? (flags&FSHARP ? 6 : undefined) : precision);
                }
                break;
              }
            }
            if (flags&FMINUS) {
              str = '-' + str;
              while (str.length < width) { str = str + ' '; }
            } else {
              if (flags&FZERO && arg !== -Infinity) {
                while (str.length < width - 1) { str = '0' + str; }
                str = '-' + str;
              } else {
                str = '-' + str;
                while (str.length < width) { str = ' ' + str; }
              }
            }
          }
          if (format_string.charAt(i) === format_string.charAt(i).toUpperCase() && arg !== Infinity && arg !== -Infinity && !isNaN(arg)) {
            str = str.toUpperCase();
          }
          str = str.replace(/([eE][-+]?)([0-9])$/, '$10$2');
          break format_sequence;

        case 'a':
        case 'A':
          // Not implemented because there are no specs for this field type.
          #{raise NotImplementedError, '`A` and `a` format field types are not implemented in Opal yet'}

        case 'c':
          arg = GET_ARG();
          if (#{`arg`.respond_to?(:to_ary)}) { arg = #{`arg`.to_ary}[0]; }
          if (#{`arg`.respond_to?(:to_str)}) {
            str = #{`arg`.to_str};
          } else {
            str = String.fromCharCode(#{Opal.coerce_to(`arg`, Integer, :to_int)});
          }
          if (str.length !== 1) {
            #{raise ArgumentError, '%c requires a character'}
          }
          if (flags&FMINUS) {
            while (str.length < width) { str = str + ' '; }
          } else {
            while (str.length < width) { str = ' ' + str; }
          }
          break format_sequence;

        case 'p':
          str = #{`GET_ARG()`.inspect};
          if (precision !== -1) { str = str.slice(0, precision); }
          if (flags&FMINUS) {
            while (str.length < width) { str = str + ' '; }
          } else {
            while (str.length < width) { str = ' ' + str; }
          }
          break format_sequence;

        case 's':
          str = #{`GET_ARG()`.to_s};
          if (precision !== -1) { str = str.slice(0, precision); }
          if (flags&FMINUS) {
            while (str.length < width) { str = str + ' '; }
          } else {
            while (str.length < width) { str = ' ' + str; }
          }
          break format_sequence;

        default:
          #{raise ArgumentError, "malformed format string - %#{`format_string.charAt(i)`}"}
        }
      }

      if (str === undefined) {
        #{raise ArgumentError, 'malformed format string - %'}
      }

      result += format_string.slice(begin_slice, end_slice) + str;
      begin_slice = i + 1;
    }

    if (#{$DEBUG} && pos_arg_num >= 0 && seq_arg_num < args.length) {
      #{raise ArgumentError, 'too many arguments for format string'}
    }

    return result + format_string.slice(begin_slice);
  }
end

#freeze ⇒ Object 



724
725
726
727
 
# File 'opal/opal/corelib/kernel.rb', line 724

def freeze
  @___frozen___ = true
  self
end

#frozen? ⇒ Boolean

Returns:



729
730
731
 
# File 'opal/opal/corelib/kernel.rb', line 729

def frozen?
  @___frozen___ || false
end

#hash ⇒ Object 



733
734
735
 
# File 'opal/opal/corelib/kernel.rb', line 733

def hash
  "#{self.class}:#{self.class.__id__}:#{__id__}"
end

#Hash(arg) ⇒ Object 



893
894
895
896
897
 
# File 'opal/opal/corelib/kernel.rb', line 893

def Hash(arg)
  return {} if arg.nil? || arg == []
  return arg if Hash === arg
  return Opal.coerce_to!(arg, Hash, :to_hash)
end

#initialize_clone(other) ⇒ Object 



115
116
117
 
# File 'opal/opal/corelib/kernel.rb', line 115

def initialize_clone(other)
  initialize_copy(other)
end

#initialize_copy(other) ⇒ Object 



737
738
 
# File 'opal/opal/corelib/kernel.rb', line 737

def initialize_copy(other)
end

#initialize_dup(other) ⇒ Object 



147
148
149
 
# File 'opal/opal/corelib/kernel.rb', line 147

def initialize_dup(other)
  initialize_copy(other)
end

#inspect ⇒ Object 



740
741
742
 
# File 'opal/opal/corelib/kernel.rb', line 740

def inspect
  to_s
end

#instance_of?(klass) ⇒ Boolean

Returns:



744
745
746
 
# File 'opal/opal/corelib/kernel.rb', line 744

def instance_of?(klass)
  `self.$$class === klass`
end

#instance_variable_defined?(name) ⇒ Boolean

Returns:



748
749
750
 
# File 'opal/opal/corelib/kernel.rb', line 748

def instance_variable_defined?(name)
  `Opal.hasOwnProperty.call(self, name.substr(1))`
end

#instance_variable_get(name) ⇒ Object 



752
753
754
755
756
757
758
 
# File 'opal/opal/corelib/kernel.rb', line 752

def instance_variable_get(name)
  %x{
    var ivar = self[name.substr(1)];

    return ivar == null ? nil : ivar;
  }
end

#instance_variable_set(name, value) ⇒ Object 



760
761
762
 
# File 'opal/opal/corelib/kernel.rb', line 760

def instance_variable_set(name, value)
  `self[name.substr(1)] = value`
end

#instance_variables ⇒ Object 



764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
 
# File 'opal/opal/corelib/kernel.rb', line 764

def instance_variables
  %x{
    var result = [];

    for (var name in self) {
      if (name.charAt(0) !== '$') {
        if (name !== '$$class' && name !== '$$id') {
          result.push('@' + name);
        }
      }
    }

    return result;
  }
end

#Integer(value, base = undefined) ⇒ Object 



780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
 
# File 'opal/opal/corelib/kernel.rb', line 780

def Integer(value, base = undefined)
  %x{
    var i, str, base_digits;

    if (!value.$$is_string) {
      if (base !== undefined) {
        #{raise ArgumentError, "base specified for non string value"}
      }
      if (value === nil) {
        #{raise TypeError, "can't convert nil into Integer"}
      }
      if (value.$$is_number) {
        if (value === Infinity || value === -Infinity || isNaN(value)) {
          #{raise FloatDomainError, value}
        }
        return Math.floor(value);
      }
      if (#{value.respond_to?(:to_int)}) {
        i = #{value.to_int};
        if (i !== nil) {
          return i;
        }
      }
      return #{Opal.coerce_to!(value, Integer, :to_i)};
    }

    if (base === undefined) {
      base = 0;
    } else {
      base = #{Opal.coerce_to(`base`, Integer, :to_int)};
      if (base === 1 || base < 0 || base > 36) {
        #{raise ArgumentError, "invalid radix #{base}"}
      }
    }

    str = value.toLowerCase();

    str = str.replace(/(\d)_(?=\d)/g, '$1');

    str = str.replace(/^(\s*[+-]?)(0[bodx]?)/, function (_, head, flag) {
      switch (flag) {
      case '0b':
        if (base === 0 || base === 2) {
          base = 2;
          return head;
        }
      case '0':
      case '0o':
        if (base === 0 || base === 8) {
          base = 8;
          return head;
        }
      case '0d':
        if (base === 0 || base === 10) {
          base = 10;
          return head;
        }
      case '0x':
        if (base === 0 || base === 16) {
          base = 16;
          return head;
        }
      }
      #{raise ArgumentError, "invalid value for Integer(): \"#{value}\""}
    });

    base = (base === 0 ? 10 : base);

    base_digits = '0-' + (base <= 10 ? base - 1 : '9a-' + String.fromCharCode(97 + (base - 11)));

    if (!(new RegExp('^\\s*[+-]?[' + base_digits + ']+\\s*$')).test(str)) {
      #{raise ArgumentError, "invalid value for Integer(): \"#{value}\""}
    }

    i = parseInt(str, base);

    if (isNaN(i)) {
      #{raise ArgumentError, "invalid value for Integer(): \"#{value}\""}
    }

    return i;
  }
end

#is_a?(klass) ⇒ Boolean Also known as: kind_of?

Returns:



899
900
901
 
# File 'opal/opal/corelib/kernel.rb', line 899

def is_a?(klass)
  `Opal.is_a(self, klass)`
end

#lambda(&block) ⇒ Object 



905
906
907
908
909
 
# File 'opal/opal/corelib/kernel.rb', line 905

def lambda(&block)
  `block.$$is_lambda = true`

  block
end

#load(file) ⇒ Object 



911
912
913
914
 
# File 'opal/opal/corelib/kernel.rb', line 911

def load(file)
  file = Opal.coerce_to!(file, String, :to_str)
  `Opal.load(Opal.normalize_loadable_path(#{file}))`
end

#loop(&block) ⇒ Object 



916
917
918
919
920
921
922
923
924
925
926
 
# File 'opal/opal/corelib/kernel.rb', line 916

def loop(&block)
  %x{
    while (true) {
      if (block() === $breaker) {
        return $breaker.$v;
      }
    }
  }

  self
end

#method(name) ⇒ Object 



26
27
28
29
30
31
32
33
34
35
36
 
# File 'opal/opal/corelib/kernel.rb', line 26

def method(name)
  %x{
    var meth = self['$' + name];

    if (!meth || meth.$$stub) {
      #{raise NameError, "undefined method `#{name}' for class `#{self.class}'"};
    }

    return #{Method.new(self, `meth`, name)};
  }
end

#methods(all = true) ⇒ Object 



38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
 
# File 'opal/opal/corelib/kernel.rb', line 38

def methods(all = true)
  %x{
    var methods = [];

    for (var key in self) {
      if (key[0] == "$" && typeof(self[key]) === "function") {
        if (all == false || all === nil) {
          if (!Opal.hasOwnProperty.call(self, key)) {
            continue;
          }
        }
        if (self[key].$$stub === undefined) {
          methods.push(key.substr(1));
        }
      }
    }

    return methods;
  }
end

#nil? ⇒ Boolean

Returns:



928
929
930
 
# File 'opal/opal/corelib/kernel.rb', line 928

def nil?
  false
end

#p(*args) ⇒ Object 



960
961
962
963
964
 
# File 'opal/opal/corelib/kernel.rb', line 960

def p(*args)
  args.each { |obj| $stdout.puts obj.inspect }

  args.length <= 1 ? args[0] : args
end

#print(*strs) ⇒ Object 



966
967
968
 
# File 'opal/opal/corelib/kernel.rb', line 966

def print(*strs)
  $stdout.print(*strs)
end

#printf(*args) ⇒ Object 



934
935
936
937
938
939
940
 
# File 'opal/opal/corelib/kernel.rb', line 934

def printf(*args)
  if args.length > 0
    print format(*args)
  end

  nil
end

#private_methods ⇒ Object Also known as: private_instance_methods 



942
943
944
 
# File 'opal/opal/corelib/kernel.rb', line 942

def private_methods(*)
  []
end

#proc(&block) ⇒ Object 



947
948
949
950
951
952
953
954
 
# File 'opal/opal/corelib/kernel.rb', line 947

def proc(&block)
  unless block
    raise ArgumentError, "tried to create Proc object without a block"
  end

  `block.$$is_lambda = false`
  block
end

#puts(*strs) ⇒ Object 



956
957
958
 
# File 'opal/opal/corelib/kernel.rb', line 956

def puts(*strs)
  $stdout.puts(*strs)
end

#raise(exception = undefined, string = undefined) ⇒ Object Also known as: fail 



974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
 
# File 'opal/opal/corelib/kernel.rb', line 974

def raise(exception = undefined, string = undefined)
  %x{
    if (exception == null && #$!) {
      throw #$!;
    }

    if (exception == null) {
      exception = #{RuntimeError.new};
    }
    else if (exception.$$is_string) {
      exception = #{RuntimeError.new exception};
    }
    else if (exception.$$is_class) {
      exception = #{exception.new string};
    }

    #$! = exception;

    throw exception;
  }
end

#rand(max = undefined) ⇒ Object Also known as: srand 



998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
 
# File 'opal/opal/corelib/kernel.rb', line 998

def rand(max = undefined)
  %x{
    if (max === undefined) {
      return Math.random();
    }
    else if (max.$$is_range) {
      var arr = #{max.to_a};

      return arr[#{rand(`arr.length`)}];
    }
    else {
      return Math.floor(Math.random() *
        Math.abs(#{Opal.coerce_to max, Integer, :to_int}));
    }
  }
end

#require(file) ⇒ Object 



1033
1034
1035
1036
 
# File 'opal/opal/corelib/kernel.rb', line 1033

def require(file)
  file = Opal.coerce_to!(file, String, :to_str)
  `Opal.require(Opal.normalize_loadable_path(#{file}))`
end

#require_relative(file) ⇒ Object 



1038
1039
1040
1041
1042
1043
 
# File 'opal/opal/corelib/kernel.rb', line 1038

def require_relative(file)
  Opal.try_convert!(file, String, :to_str)
  file = File.expand_path File.join(`Opal.current_file`, '..', file)

  `Opal.require(Opal.normalize_loadable_path(#{file}))`
end

#require_tree(path) ⇒ Object

path should be the full path to be found in registered modules (Opal.modules)



1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
 
# File 'opal/opal/corelib/kernel.rb', line 1046

def require_tree(path)
  path = File.expand_path(path)
  path = '' if path == '.'

  %x{
    for (var name in Opal.modules) {
      if (#{`name`.start_with?(path)}) {
        Opal.require(name);
      }
    }
  }

  nil
end

#respond_to?(name, include_all = false) ⇒ Boolean

Returns:



1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
 
# File 'opal/opal/corelib/kernel.rb', line 1015

def respond_to?(name, include_all = false)
  return true if respond_to_missing?(name)

  %x{
    var body = self['$' + name];

    if (typeof(body) === "function" && !body.$$stub) {
      return true;
    }
  }

  false
end

#respond_to_missing?(method_name) ⇒ Boolean

Returns:



1029
1030
1031
 
# File 'opal/opal/corelib/kernel.rb', line 1029

def respond_to_missing?(method_name)
  false
end

#singleton_class ⇒ Object 



1064
1065
1066
 
# File 'opal/opal/corelib/kernel.rb', line 1064

def singleton_class
  `Opal.get_singleton_class(self)`
end

#String(str) ⇒ Object 



1072
1073
1074
1075
 
# File 'opal/opal/corelib/kernel.rb', line 1072

def String(str)
  Opal.coerce_to?(str, String, :to_str) ||
    Opal.coerce_to!(str, String, :to_s)
end

#taint ⇒ Object Also known as: untaint 



1077
1078
1079
 
# File 'opal/opal/corelib/kernel.rb', line 1077

def taint
  self
end

#tainted? ⇒ Boolean

Returns:



1081
1082
1083
 
# File 'opal/opal/corelib/kernel.rb', line 1081

def tainted?
  false
end

#tap {|_self| ... } ⇒ Object

Yields:

  • (_self)

Yield Parameters:

  • _self (Kernel) —

    the object that the method was called on



1085
1086
1087
1088
 
# File 'opal/opal/corelib/kernel.rb', line 1085

def tap(&block)
  yield self
  self
end

#to_proc ⇒ Object 



1090
1091
1092
 
# File 'opal/opal/corelib/kernel.rb', line 1090

def to_proc
  self
end

#to_s ⇒ Object 



1094
1095
1096
 
# File 'opal/opal/corelib/kernel.rb', line 1094

def to_s
  "#<#{self.class}:0x#{__id__.to_s(16)}>"
end

#warn(*strs) ⇒ Object 



970
971
972
 
# File 'opal/opal/corelib/kernel.rb', line 970

def warn(*strs)
  $stderr.puts(*strs) unless $VERBOSE.nil? || strs.empty?
end