use regex as keywords in ruby hash

hash, regex, ruby

Solution

Make a subclass, inherit `Hash` class and override `[]` behaviour so it checks whether it matches each regex in your hash and returns the corresponding value.

Problem

I have hash mapping ``` H = { "alc" => "AL", "alco" => "AL", "alcoh" => "AL", "alcohol" => "AL", "alcoholic" => "AL", } ``` now I want to use a regex to represent all the keys, like H={ /^alc/ => "AL" } later on I want to use H["alc"] or H["alco"] to retrieve the value. But if I use regex, I can not get the value properly. What should I do?

Original source