Class: Hash

Inherits:
Object show all
Defined in:
lib/gooddata/extensions/hash.rb

Overview

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.

Direct Known Subclasses

GoodData::Helpers::DeepMergeableHash

Instance Method Summary collapse

Instance Method Details

#compact ⇒ Object 



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# File 'lib/gooddata/extensions/hash.rb', line 35

def compact
  select { |_, value| !value.nil? }
end

#except(*keys) ⇒ Object

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:

=> 1.with_indifferent_access.except(:a) # => {} => 1.with_indifferent_access.except("a") # => {}



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# File 'lib/gooddata/extensions/hash.rb', line 20

def except(*keys)
  dup.except!(*keys)
end

#except!(*keys) ⇒ Object

Replaces the hash without the given keys.



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# File 'lib/gooddata/extensions/hash.rb', line 25

def except!(*keys)
  keys.each { |key| delete(key) }
  self
end

#slice(*keys) ⇒ Object 



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# File 'lib/gooddata/extensions/hash.rb', line 30

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