Method: Hash#only

Defined in:

lib/extlib/hash.rb

#only(*allowed) ⇒ Hash

Create a hash with only key/value pairs in receiver and allowed

{ :one => 1, :two => 2, :three => 3 }.only(:one)    #=> { :one => 1 }

Parameters:

• *allowed (Array[String, Symbol]) —

  The hash keys to include.

Returns:

• (Hash) —

  A new hash with only the selected keys.

# File 'lib/extlib/hash.rb', line 167

def only(*allowed)
  hash = {}
  allowed.each {|k| hash[k] = self[k] if self.has_key?(k) }
  hash
end