SyncEnumerator (Class)

In: generator.rb
Parent: Object

SyncEnumerator creates an Enumerable object from multiple Enumerable objects and enumerates them synchronously.

Example

  require 'generator'

  s = SyncEnumerator.new([1,2,3], ['a', 'b', 'c'])

  # Yields [1, 'a'], [2, 'b'], and [3,'c']
  s.each { |row| puts row.join(', ') }

Methods

each   end?   length   new   size  

Included Modules

Enumerable

Public Class methods

new(*enums)

Creates a new SyncEnumerator which enumerates rows of given Enumerable objects.

[Source]

# File generator.rb, line 186
  def initialize(*enums)
    @gens = enums.map { |e| Generator.new(e) }
  end

Public Instance methods

each() {|ret| ...}

Enumerates rows of the Enumerable objects.

[Source]

# File generator.rb, line 214
  def each
    @gens.each { |g| g.rewind }

    loop do
      count = 0

      ret = @gens.map { |g|
        if g.end?
          count += 1
          nil
        else
          g.next
        end
      }

      if count == @gens.size
        break
      end

      yield ret
    end

    self
  end
end?(i = nil)

Returns true if the given nth Enumerable object has reached the end. If no argument is given, returns true if any of the Enumerable objects has reached the end.

[Source]

# File generator.rb, line 205
  def end?(i = nil)
    if i.nil?
      @gens.detect { |g| g.end? } ? true : false
    else
      @gens[i].end?
    end
  end
length()

Returns the number of enumerated Enumerable objects, i.e. the size of each row.

[Source]

# File generator.rb, line 198
  def length
    @gens.length
  end
size()

Returns the number of enumerated Enumerable objects, i.e. the size of each row.

[Source]

# File generator.rb, line 192
  def size
    @gens.size
  end

[Validate]