Class: Hash

Inherits:

Object

• Object
• Hash

show all

Defined in:

lib/chinese/core_ext/hash.rb

Instance Method Summary (collapse)

• - (Object) delete_keys(*keys)

  Returns a copy of self with *keys removed.

• - (Object) delete_keys!(*keys)

  Remove *keys from self.

• - (Hash) slice(*keys)

  Creates a sub-hash from self with the keys from keys.

• - (Object) slice!(*keys)

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# File 'lib/chinese/core_ext/hash.rb', line 6

def delete_keys(*keys)
  hash = self.dup

  keys.each do |key|
    hash.delete(key)
  end
  hash
end

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# File 'lib/chinese/core_ext/hash.rb', line 16

def delete_keys!(*keys)
  keys.each do |key|
    self.delete(key)
  end
end

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# File 'lib/chinese/core_ext/hash.rb', line 25

def slice(*keys)
  self.select { |k,v| keys.include?(k) }
end

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# File 'lib/chinese/core_ext/hash.rb', line 29

def slice!(*keys)
  sub_hash = self.select { |k,v| keys.include?(k) }
  # Remove 'keys' form self:
  self.delete_keys!(*sub_hash.keys)
  sub_hash
end