Module: Enumerable

Included in:
Array, Enumerator, Enumerator::Generator, Hash, Range, Struct
Defined in:
opal/opal/corelib/enumerable.rb

Instance Method Summary collapse

Instance Method Details

#all?(&block) ⇒ Boolean

Returns:



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# File 'opal/opal/corelib/enumerable.rb', line 2

def all?(&block)
  %x{
    var result = true;

    if (block !== nil) {
      self.$each.$$p = function() {
        var value = Opal.yieldX(block, arguments);

        if (value === $breaker) {
          result = $breaker.$v;
          return $breaker;
        }

        if (#{Opal.falsy?(`value`)}) {
          result = false;
          return $breaker;
        }
      };
    }
    else {
      self.$each.$$p = function(obj) {
        if (arguments.length == 1 && #{Opal.falsy?(`obj`)}) {
          result = false;
          return $breaker;
        }
      };
    }

    self.$each();

    return result;
  }
end

#any?(&block) ⇒ Boolean

Returns:



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# File 'opal/opal/corelib/enumerable.rb', line 36

def any?(&block)
  %x{
    var result = false;

    if (block !== nil) {
      self.$each.$$p = function() {
        var value = Opal.yieldX(block, arguments);

        if (value === $breaker) {
          result = $breaker.$v;
          return $breaker;
        }

        if (#{Opal.truthy?(`value`)}) {
          result = true;
          return $breaker;
        }
      };
    }
    else {
      self.$each.$$p = function(obj) {
        if (arguments.length != 1 || #{Opal.truthy?(`obj`)}) {
          result = true;
          return $breaker;
        }
      }
    }

    self.$each();

    return result;
  }
end

#chunk(state = undefined, &block) ⇒ Object

Raises:



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# File 'opal/opal/corelib/enumerable.rb', line 70

def chunk(state = undefined, &block)
  raise NotImplementedError
end

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



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# File 'opal/opal/corelib/enumerable.rb', line 74

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

  %x{
    var result = [];

    self.$each.$$p = function() {
      var value = Opal.yieldX(block, arguments);

      if (value === $breaker) {
        result = $breaker.$v;
        return $breaker;
      }

      result.push(value);
    };

    self.$each();

    return result;
  }
end

#collect_concat(&block) ⇒ Object Also known as: flat_map 



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# File 'opal/opal/corelib/enumerable.rb', line 97

def collect_concat(&block)
  return enum_for :collect_concat unless block_given?
  map { |item| yield item }.flatten(1)
end

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



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# File 'opal/opal/corelib/enumerable.rb', line 102

def count(object = undefined, &block)
  %x{
    var result = 0;

    if (object != null) {
      block = function() {
        return #{Opal.destructure(`arguments`) == `object`};
      };
    }
    else if (block === nil) {
      block = function() { return true; };
    }

    self.$each.$$p = function() {
      var value = Opal.yieldX(block, arguments);

      if (value === $breaker) {
        result = $breaker.$v;
        return $breaker;
      }

      if (#{Opal.truthy?(`value`)}) {
        result++;
      }
    }

    self.$each();

    return result;
  }
end

#cycle(n = nil, &block) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 134

def cycle(n = nil, &block)
  return enum_for :cycle, n unless block

  unless n.nil?
    n = Opal.coerce_to! n, Integer, :to_int

    return if `n <= 0`
  end

  %x{
    var result,
        all  = [];

    self.$each.$$p = function() {
      var param = #{Opal.destructure(`arguments`)},
          value = Opal.yield1(block, param);

      if (value === $breaker) {
        result = $breaker.$v;
        return $breaker;
      }

      all.push(param);
    }

    self.$each();

    if (result !== undefined) {
      return result;
    }

    if (all.length === 0) {
      return nil;
    }
  }

  if n.nil?
    %x{
      while (true) {
        for (var i = 0, length = all.length; i < length; i++) {
          var value = Opal.yield1(block, all[i]);

          if (value === $breaker) {
            return $breaker.$v;
          }
        }
      }
    }
  else
    %x{
      while (n > 1) {
        for (var i = 0, length = all.length; i < length; i++) {
          var value = Opal.yield1(block, all[i]);

          if (value === $breaker) {
            return $breaker.$v;
          }
        }

        n--;
      }
    }
  end
end

#detect(ifnone = undefined, &block) ⇒ Object Also known as: find 



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# File 'opal/opal/corelib/enumerable.rb', line 199

def detect(ifnone = undefined, &block)
  return enum_for :detect, ifnone unless block_given?

  %x{
    var result = undefined;

    self.$each.$$p = function() {
      var params = #{Opal.destructure(`arguments`)},
          value  = Opal.yield1(block, params);

      if (value === $breaker) {
        result = $breaker.$v;
        return $breaker;
      }

      if (#{Opal.truthy?(`value`)}) {
        result = params;
        return $breaker;
      }
    };

    self.$each();

    if (result === undefined && ifnone !== undefined) {
      if (typeof(ifnone) === 'function') {
        result = ifnone();
      }
      else {
        result = ifnone;
      }
    }

    return result === undefined ? nil : result;
  }
end

#drop(number) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 235

def drop(number)
  number = Opal.coerce_to number, Integer, :to_int

  if `number < 0`
    raise ArgumentError, "attempt to drop negative size"
  end

  %x{
    var result  = [],
        current = 0;

    self.$each.$$p = function() {
      if (number <= current) {
        result.push(#{Opal.destructure(`arguments`)});
      }

      current++;
    };

    self.$each()

    return result;
  }
end

#drop_while(&block) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 260

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

  %x{
    var result   = [],
        dropping = true;

    self.$each.$$p = function() {
      var param = #{Opal.destructure(`arguments`)};

      if (dropping) {
        var value = Opal.yield1(block, param);

        if (value === $breaker) {
          result = $breaker.$v;
          return $breaker;
        }

        if (#{Opal.falsy?(`value`)}) {
          dropping = false;
          result.push(param);
        }
      }
      else {
        result.push(param);
      }
    };

    self.$each();

    return result;
  }
end

#each_cons(n, &block) ⇒ Object

Raises:



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# File 'opal/opal/corelib/enumerable.rb', line 294

def each_cons(n, &block)
  raise NotImplementedError
end

#each_entry(&block) ⇒ Object

Raises:



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# File 'opal/opal/corelib/enumerable.rb', line 298

def each_entry(&block)
  raise NotImplementedError
end

#each_slice(n, &block) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 302

def each_slice(n, &block)
  n = Opal.coerce_to n, Integer, :to_int

  if `n <= 0`
    raise ArgumentError, 'invalid slice size'
  end

  return enum_for :each_slice, n unless block_given?

  %x{
    var result,
        slice = []

    self.$each.$$p = function() {
      var param = #{Opal.destructure(`arguments`)};

      slice.push(param);

      if (slice.length === n) {
        if (Opal.yield1(block, slice) === $breaker) {
          result = $breaker.$v;
          return $breaker;
        }

        slice = [];
      }
    };

    self.$each();

    if (result !== undefined) {
      return result;
    }

    // our "last" group, if smaller than n then won't have been yielded
    if (slice.length > 0) {
      if (Opal.yield1(block, slice) === $breaker) {
        return $breaker.$v;
      }
    }
  }

  nil
end

#each_with_index(*args, &block) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 347

def each_with_index(*args, &block)
  return enum_for :each_with_index, *args unless block_given?

  %x{
    var result,
        index = 0;

    self.$each.$$p = function() {
      var param = #{Opal.destructure(`arguments`)},
          value = block(param, index);

      if (value === $breaker) {
        result = $breaker.$v;
        return $breaker;
      }

      index++;
    };

    self.$each.apply(self, args);

    if (result !== undefined) {
      return result;
    }
  }

  self
end

#each_with_object(object, &block) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 376

def each_with_object(object, &block)
  return enum_for :each_with_object, object unless block_given?

  %x{
    var result;

    self.$each.$$p = function() {
      var param = #{Opal.destructure(`arguments`)},
          value = block(param, object);

      if (value === $breaker) {
        result = $breaker.$v;
        return $breaker;
      }
    };

    self.$each();

    if (result !== undefined) {
      return result;
    }
  }

  object
end

#entries(*args) ⇒ Object Also known as: to_a 



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# File 'opal/opal/corelib/enumerable.rb', line 402

def entries(*args)
  %x{
    var result = [];

    self.$each.$$p = function() {
      result.push(#{Opal.destructure(`arguments`)});
    };

    self.$each.apply(self, args);

    return result;
  }
end

#find_all(&block) ⇒ Object Also known as: select 



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# File 'opal/opal/corelib/enumerable.rb', line 418

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

  %x{
    var result = [];

    self.$each.$$p = function() {
      var param = #{Opal.destructure(`arguments`)},
          value = Opal.yield1(block, param);

      if (value === $breaker) {
        result = $breaker.$v;
        return $breaker;
      }

      if (#{Opal.truthy?(`value`)}) {
        result.push(param);
      }
    };

    self.$each();

    return result;
  }
end

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



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# File 'opal/opal/corelib/enumerable.rb', line 444

def find_index(object = undefined, &block)
  return enum_for :find_index if `object === undefined && block === nil`

  %x{
    var result = nil,
        index  = 0;

    if (object != null) {
      self.$each.$$p = function() {
        var param = #{Opal.destructure(`arguments`)};

        if (#{`param` == `object`}) {
          result = index;
          return $breaker;
        }

        index += 1;
      };
    }
    else if (block !== nil) {
      self.$each.$$p = function() {
        var value = Opal.yieldX(block, arguments);

        if (value === $breaker) {
          result = $breaker.$v;
          return $breaker;
        }

        if (#{Opal.truthy?(`value`)}) {
          result = index;
          return $breaker;
        }

        index += 1;
      };
    }

    self.$each();

    return result;
  }
end

#first(number = undefined) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 487

def first(number = undefined)
  if `number === undefined`
    result = nil

    %x{
      self.$each.$$p = function() {
        result = #{Opal.destructure(`arguments`)};

        return $breaker;
      };

      self.$each();
    }
  else
    result = []
    number = Opal.coerce_to number, Integer, :to_int

    if `number < 0`
      raise ArgumentError, 'attempt to take negative size'
    end

    if `number == 0`
      return []
    end

    %x{
      var current = 0,
          number  = #{Opal.coerce_to number, Integer, :to_int};

      self.$each.$$p = function() {
        result.push(#{Opal.destructure(`arguments`)});

        if (number <= ++current) {
          return $breaker;
        }
      };

      self.$each();
    }
  end

  result
end

#grep(pattern, &block) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 533

def grep(pattern, &block)
  %x{
    var result = [];

    if (block !== nil) {
      self.$each.$$p = function() {
        var param = #{Opal.destructure(`arguments`)},
            value = #{pattern === `param`};

        if (#{Opal.truthy?(`value`)}) {
          value = Opal.yield1(block, param);

          if (value === $breaker) {
            result = $breaker.$v;
            return $breaker;
          }

          result.push(value);
        }
      };
    }
    else {
      self.$each.$$p = function() {
        var param = #{Opal.destructure(`arguments`)},
            value = #{pattern === `param`};

        if (#{Opal.truthy?(`value`)}) {
          result.push(param);
        }
      };
    }

    self.$each();

    return result;
  }
end

#group_by(&block) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 571

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

  hash = Hash.new

  %x{
    var result;

    self.$each.$$p = function() {
      var param = #{Opal.destructure(`arguments`)},
          value = Opal.yield1(block, param);

      if (value === $breaker) {
        result = $breaker.$v;
        return $breaker;
      }

      #{(hash[`value`] ||= []) << `param`};
    }

    self.$each();

    if (result !== undefined) {
      return result;
    }
  }

  hash
end

#include?(obj) ⇒ Boolean Also known as: member?

Returns:



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# File 'opal/opal/corelib/enumerable.rb', line 601

def include?(obj)
  %x{
    var result = false;

    self.$each.$$p = function() {
      var param = #{Opal.destructure(`arguments`)};

      if (#{`param` == obj}) {
        result = true;
        return $breaker;
      }
    }

    self.$each();

    return result;
  }
end

#inject(object = undefined, sym = undefined, &block) ⇒ Object Also known as: reduce 



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# File 'opal/opal/corelib/enumerable.rb', line 620

def inject(object = undefined, sym = undefined, &block)
  %x{
    var result = object;

    if (block !== nil && sym === undefined) {
      self.$each.$$p = function() {
        var value = #{Opal.destructure(`arguments`)};

        if (result === undefined) {
          result = value;
          return;
        }

        value = Opal.yieldX(block, [result, value]);

        if (value === $breaker) {
          result = $breaker.$v;
          return $breaker;
        }

        result = value;
      };
    }
    else {
      if (sym === undefined) {
        if (!#{Symbol === object}) {
          #{raise TypeError, "#{object.inspect} is not a Symbol"};
        }

        sym    = object;
        result = undefined;
      }

      self.$each.$$p = function() {
        var value = #{Opal.destructure(`arguments`)};

        if (result === undefined) {
          result = value;
          return;
        }

        result = #{`result`.__send__ sym, `value`};
      };
    }

    self.$each();

    return result == undefined ? nil : result;
  }
end

#lazy ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 671

def lazy
  Enumerator::Lazy.new(self, enumerator_size) {|enum, *args|
    enum.yield(*args)
  }
end

#max(&block) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 684

def max(&block)
  %x{
    var result;

    if (block !== nil) {
      self.$each.$$p = function() {
        var param = #{Opal.destructure(`arguments`)};

        if (result === undefined) {
          result = param;
          return;
        }

        var value = block(param, result);

        if (value === $breaker) {
          result = $breaker.$v;
          return $breaker;
        }

        if (value === nil) {
          #{raise ArgumentError, "comparison failed"};
        }

        if (value > 0) {
          result = param;
        }
      };
    }
    else {
      self.$each.$$p = function() {
        var param = #{Opal.destructure(`arguments`)};

        if (result === undefined) {
          result = param;
          return;
        }

        if (#{Opal.compare(`param`, `result`)} > 0) {
          result = param;
        }
      };
    }

    self.$each();

    return result === undefined ? nil : result;
  }
end

#max_by(&block) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 734

def max_by(&block)
  return enum_for :max_by unless block

  %x{
    var result,
        by;

    self.$each.$$p = function() {
      var param = #{Opal.destructure(`arguments`)},
          value = Opal.yield1(block, param);

      if (result === undefined) {
        result = param;
        by     = value;
        return;
      }

      if (value === $breaker) {
        result = $breaker.$v;
        return $breaker;
      }

      if (#{`value` <=> `by`} > 0) {
        result = param
        by     = value;
      }
    };

    self.$each();

    return result === undefined ? nil : result;
  }
end

#min(&block) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 770

def min(&block)
  %x{
    var result;

    if (block !== nil) {
      self.$each.$$p = function() {
        var param = #{Opal.destructure(`arguments`)};

        if (result === undefined) {
          result = param;
          return;
        }

        var value = block(param, result);

        if (value === $breaker) {
          result = $breaker.$v;
          return $breaker;
        }

        if (value === nil) {
          #{raise ArgumentError, "comparison failed"};
        }

        if (value < 0) {
          result = param;
        }
      };
    }
    else {
      self.$each.$$p = function() {
        var param = #{Opal.destructure(`arguments`)};

        if (result === undefined) {
          result = param;
          return;
        }

        if (#{Opal.compare(`param`, `result`)} < 0) {
          result = param;
        }
      };
    }

    self.$each();

    return result === undefined ? nil : result;
  }
end

#min_by(&block) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 820

def min_by(&block)
  return enum_for :min_by unless block

  %x{
    var result,
        by;

    self.$each.$$p = function() {
      var param = #{Opal.destructure(`arguments`)},
          value = Opal.yield1(block, param);

      if (result === undefined) {
        result = param;
        by     = value;
        return;
      }

      if (value === $breaker) {
        result = $breaker.$v;
        return $breaker;
      }

      if (#{`value` <=> `by`} < 0) {
        result = param
        by     = value;
      }
    };

    self.$each();

    return result === undefined ? nil : result;
  }
end

#minmax(&block) ⇒ Object

Raises:



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# File 'opal/opal/corelib/enumerable.rb', line 854

def minmax(&block)
  raise NotImplementedError
end

#minmax_by(&block) ⇒ Object

Raises:



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# File 'opal/opal/corelib/enumerable.rb', line 858

def minmax_by(&block)
  raise NotImplementedError
end

#none?(&block) ⇒ Boolean

Returns:



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# File 'opal/opal/corelib/enumerable.rb', line 862

def none?(&block)
  %x{
    var result = true;

    if (block !== nil) {
      self.$each.$$p = function() {
        var value = Opal.yieldX(block, arguments);

        if (value === $breaker) {
          result = $breaker.$v;
          return $breaker;
        }

        if (#{Opal.truthy?(`value`)}) {
          result = false;
          return $breaker;
        }
      }
    }
    else {
      self.$each.$$p = function() {
        var value = #{Opal.destructure(`arguments`)};

        if (#{Opal.truthy?(`value`)}) {
          result = false;
          return $breaker;
        }
      };
    }

    self.$each();

    return result;
  }
end

#one?(&block) ⇒ Boolean

Returns:



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# File 'opal/opal/corelib/enumerable.rb', line 898

def one?(&block)
  %x{
    var result = false;

    if (block !== nil) {
      self.$each.$$p = function() {
        var value = Opal.yieldX(block, arguments);

        if (value === $breaker) {
          result = $breaker.$v;
          return $breaker;
        }

        if (#{Opal.truthy?(`value`)}) {
          if (result === true) {
            result = false;
            return $breaker;
          }

          result = true;
        }
      }
    }
    else {
      self.$each.$$p = function() {
        var value = #{Opal.destructure(`arguments`)};

        if (#{Opal.truthy?(`value`)}) {
          if (result === true) {
            result = false;
            return $breaker;
          }

          result = true;
        }
      }
    }

    self.$each();

    return result;
  }
end

#partition(&block) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 942

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

  %x{
    var truthy = [], falsy = [];

    self.$each.$$p = function() {
      var param = #{Opal.destructure(`arguments`)},
          value = Opal.yield1(block, param);

      if (value === $breaker) {
        result = $breaker.$v;
        return $breaker;
      }

      if (#{Opal.truthy?(`value`)}) {
        truthy.push(param);
      }
      else {
        falsy.push(param);
      }
    };

    self.$each();

    return [truthy, falsy];
  }
end

#reject(&block) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 973

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

  %x{
    var result = [];

    self.$each.$$p = function() {
      var param = #{Opal.destructure(`arguments`)},
          value = Opal.yield1(block, param);

      if (value === $breaker) {
        result = $breaker.$v;
        return $breaker;
      }

      if (#{Opal.falsy?(`value`)}) {
        result.push(param);
      }
    };

    self.$each();

    return result;
  }
end

#reverse_each(&block) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 999

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

  %x{
    var result = [];

    self.$each.$$p = function() {
      result.push(arguments);
    };

    self.$each();

    for (var i = result.length - 1; i >= 0; i--) {
      Opal.yieldX(block, result[i]);
    }

    return result;
  }
end

#slice_before(pattern = undefined, &block) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 1021

def slice_before(pattern = undefined, &block)
  if `pattern === undefined && block === nil || arguments.length > 1`
    raise ArgumentError, "wrong number of arguments (#{`arguments.length`} for 1)"
  end

  Enumerator.new {|e|
    %x{
      var slice = [];

      if (block !== nil) {
        if (pattern === undefined) {
          self.$each.$$p = function() {
            var param = #{Opal.destructure(`arguments`)},
                value = Opal.yield1(block, param);

            if (#{Opal.truthy?(`value`)} && slice.length > 0) {
              #{e << `slice`};
              slice = [];
            }

            slice.push(param);
          };
        }
        else {
          self.$each.$$p = function() {
            var param = #{Opal.destructure(`arguments`)},
                value = block(param, #{pattern.dup});

            if (#{Opal.truthy?(`value`)} && slice.length > 0) {
              #{e << `slice`};
              slice = [];
            }

            slice.push(param);
          };
        }
      }
      else {
        self.$each.$$p = function() {
          var param = #{Opal.destructure(`arguments`)},
              value = #{pattern === `param`};

          if (#{Opal.truthy?(`value`)} && slice.length > 0) {
            #{e << `slice`};
            slice = [];
          }

          slice.push(param);
        };
      }

      self.$each();

      if (slice.length > 0) {
        #{e << `slice`};
      }
    }
  }
end

#sort(&block) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 1081

def sort(&block)
  ary = to_a
  block = -> a,b {a <=> b} unless block_given?
  return `ary.sort(block)`
end

#sort_by(&block) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 1087

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

  map {
    arg = Opal.destructure(`arguments`)

    [block.call(arg), arg]
  }.sort { |a, b| a[0] <=> b[0] }.map { |arg| `arg[1]` }
end

#take(num) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 1097

def take(num)
  first(num)
end

#take_while(&block) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 1101

def take_while(&block)
  return enum_for :take_while unless block

  %x{
    var result = [];

    self.$each.$$p = function() {
      var param = #{Opal.destructure(`arguments`)},
          value = Opal.yield1(block, param);

      if (value === $breaker) {
        result = $breaker.$v;
        return $breaker;
      }

      if (#{Opal.falsy?(`value`)}) {
        return $breaker;
      }

      result.push(param);
    };

    self.$each();

    return result;
  }
end

#zip(*others, &block) ⇒ Object 



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# File 'opal/opal/corelib/enumerable.rb', line 1131

def zip(*others, &block)
  to_a.zip(*others)
end