In Files

  • generator.rb

Parent

Object

Included Modules

  • Enumerable

Class/Module Index [+]

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SyncEnumerator

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(', ') }

Public Class Methods

new(*enums) click to toggle source

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

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

Public Instance Methods

each() click to toggle source

Enumerates rows of the Enumerable objects.

 
               # 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) click to toggle source

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.

 
               # 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() click to toggle source

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

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

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

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

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