From: Eero Saynatkari <ruby-ml@...>
Date: 2006-01-07T07:00:19+09:00
Subject: Re: Case-insensitive hash?

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On 2006.01.07 05:05, Gregory Seidman wrote:
> So I understand that a hash can use keys of any type, not just string (or
> symbol), but there are occasions when I have a hash that has been populat=
ed
> with string keys whose values I would like to access case-insensitively. =
Is
> there a setting or something? Do I have to write a wrapper to deal with i=
t?

If you always access that particular Hash case-insensitively, then
the simplest solution would be to filter input to it:

  @hash[key.downcase] =3D value

If, on the other hand, you alter between sensitive and insensitive,
you would filter the output instead=20

  # (Naively)
  nil unless @hash.keys.find {|k| key.downcase =3D=3D k.downcase}
  @hash[key]

If you need to, you could encapsulate this behaviour in a subclass.

> --Greg


E

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