Sha256: e345b72e8749536877d9819ccd815ba9e4b3c341b30010e590ffb691c9344eb7
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Versions: 8
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Stored size: 1.7 KB
Contents
#--
# Copyright (c) 2010-2011 Michael Berkovich
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#++
class Hash
# Return all combinations of a hash.
#
# Example:
# {
# :a => [1, 2]
# :b => [1, 2]
# }.combinations #=> [{:a=>1, :b=>1}, {:a=>1, :b=>2}, {:a=>2, :b=>1}, {:a=>2, :b=>2}]
#
def combinations
return [{}] if empty?
copy = dup
values = copy.delete(key = keys.first)
result = []
copy.combinations.each do |tail|
values.each do |value|
result << tail.merge(key=>value)
end
end
result
end
def tr8n_translated
return self if frozen?
@tr8n_translated = true
self
end
def tr8n_translated?
@tr8n_translated
end
end
Version data entries
8 entries across 8 versions & 1 rubygems