extract!(*keys) public

No documentation

This method has no description. You can help the Ruby on Rails community by adding new notes.

Show source
Register or log in to add new notes.
September 8, 2013
0 thanks

without a bang

We can use hash#slice if we want an Hash#extract (without bang) like behavior.

August 13, 2014 - (>= v4.0.2)
0 thanks

Non-existent key semantics changed.

For Rails 4.0, the behaviour of this has changed when you pass a key that isn’t in the hash.

3.2 (undocumented):

{ a: 1, b: 2 }.extract!(:a, :x) # => {:a=>1, :x => nil}

4.0 (as per docs):

{ a: 1, b: 2 }.extract!(:a, :x) # => {:a=>1}

The 4.0 behaviour is now consistent with the behaviour of slice, the 3.2 behaviour was not.