As the title.

 { a: 1, b: 2, c: 3 }.stringify_keys # => {"a"=>1, "b"=>2, "c"=>3}

When the hierarchy of hash is deep

deep_stringify_keys it is deep_stringify_keys , it will change to all symbols regardless of the hierarchy. (Rails 4)

 { a: 1, b: 2, c: { d: 3 } }.deep_stringify_keys # => {"a"=>1, "b"=>2, "c"=>{"d"=>3}}

Wow deep stringify keys

deep_stringify_keys , for example, even if there is an array in the middle, it does not matter.

 { a:1, b: 2, c: [{ d: [ { e:3 }] } ] }.deep_stringify_keys # => {"a"=>1, "b"=>2, "c"=>[{"d"=>[{"e"=>3}]}]}

There is also a destructive method. ( stringify_keys! / deep_stringify_keys! )
stringify instead of stringfy. Be careful with typos.
I posted it because I didn't hit it with "Rails / All / Symbols / Strings".

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