[1] pry(main)> def foo(hash_thing)
[1] pry(main)*   hash_thing[:foo]
[1] pry(main)* end
=> :foo
[2] pry(main)> hash = { foo: 'bar' }
=> {:foo=>"bar"}
[3] pry(main)> foo hash
=> "bar"
[4] pry(main)>