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Contents
class Hash
# A "smarter" hash#each which iterates through each
# _value_ if only one block parameter is given.
#
# {:a=>"a", 2=>"b", "x"=>"c"}.each{ |v| puts v }
#
# _produces_
#
# a
# b
# c
#
# WARNING! Use with caution. Methods from other libraries
# may depend on the old behavior, expecting a two element
# array to be passed into a single block argument.
#
def each(&yld)
case yld.arity
when 0
when 1
each_value{|v| yield(v)}
else
each_pair{|k,v| yld.call(k,v)}
end
self
end
end
# _____ _
# |_ _|__ ___| |_
# | |/ _ \/ __| __|
# | | __/\__ \ |_
# |_|\___||___/\__|
#
=begin test
require 'test/unit'
class TCHash < Test::Unit::TestCase
def test_each_1
h = { :a=>1, :b=>2, :c=>3 }
a = []
h.each { |v| a << v }
assert_equal( [1,2,3], a.sort )
end
def test_each_2
h = { 'a'=>1, 'b'=>2, 'c'=>3 }
a = []
h.each { |k,v| a << [k,v] }
assert_equal( [['a',1],['b',2],['c',3]], a.sort )
end
end
=end
Version data entries
17 entries across 17 versions & 1 rubygems