houdini/lib/hash.rb

11 lines
233 B
Ruby

class Hash
def keep_keys(*keys)
keys = keys.map{|k| k.to_s}
clone.delete_if{|k,v| !keys.include?(k.to_s)}
end
def keep_keys!(*keys)
keys = keys.map{|k| k.to_s}
delete_if{|k,v| !keys.include?(k.to_s)}
end
end