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Contents
# encoding: UTF-8
#
# Copyright (c) 2010-2015 GoodData Corporation. All rights reserved.
# This source code is licensed under the BSD-style license found in the
# LICENSE file in the root directory of this source tree.
class Hash
# Return a hash that includes everything but the given keys. This is useful for
# limiting a set of parameters to everything but a few known toggles:
#
# @person.update_attributes(params[:person].except(:admin))
#
# If the receiver responds to +convert_key+, the method is called on each of the
# arguments. This allows +except+ to play nice with hashes with indifferent access
# for instance:
#
# {:a => 1}.with_indifferent_access.except(:a) # => {}
# {:a => 1}.with_indifferent_access.except("a") # => {}
#
def except(*keys)
dup.except!(*keys)
end
# Replaces the hash without the given keys.
def except!(*keys)
keys.each { |key| delete(key) }
self
end
def slice(*keys)
keys.map! { |key| convert_key(key) } if respond_to?(:convert_key, true)
keys.each_with_object(self.class.new) { |k, hash| hash[k] = self[k] if key?(k) }
end
def compact
select { |_, value| !value.nil? }
end
end
Version data entries
29 entries across 29 versions & 2 rubygems