class Hash
Public Instance Methods
only(*keys)
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raw.github.com/lukeredpath/clickatell/master/lib/core-ext/hash.rb Returns a new hash containing only the keys specified that exist in the current hash.
{:a => '1', :b => '2', :c => '3'}.only(:a, :c) # => {:a => '1', :c => '3'}
Keys that do not exist in the original hash are ignored.
# File lib/core-ext/hash.rb, line 10 def only(*keys) inject( {} ) do |new_hash, (key, value)| new_hash[key] = value if keys.include?(key) new_hash end end