diff options
Diffstat (limited to 'ruby_1_8_6/lib/rexml/syncenumerator.rb')
-rw-r--r-- | ruby_1_8_6/lib/rexml/syncenumerator.rb | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/ruby_1_8_6/lib/rexml/syncenumerator.rb b/ruby_1_8_6/lib/rexml/syncenumerator.rb new file mode 100644 index 0000000000..955e006cb2 --- /dev/null +++ b/ruby_1_8_6/lib/rexml/syncenumerator.rb @@ -0,0 +1,33 @@ +module REXML + class SyncEnumerator + include Enumerable + + # Creates a new SyncEnumerator which enumerates rows of given + # Enumerable objects. + def initialize(*enums) + @gens = enums + @biggest = @gens[0] + @gens.each {|x| @biggest = x if x.size > @biggest.size } + end + + # Returns the number of enumerated Enumerable objects, i.e. the size + # of each row. + def size + @gens.size + end + + # Returns the number of enumerated Enumerable objects, i.e. the size + # of each row. + def length + @gens.length + end + + # Enumerates rows of the Enumerable objects. + def each + @biggest.zip( *@gens ) {|a| + yield(*a[1..-1]) + } + self + end + end +end |