From: tho_mica_l <micathom@...>
Date: 2007-12-31T17:34:57+09:00
Subject: Re: Detecting Arrow Keys

> Hmm... Something's not right here... Why are they all the same?

Cursor keys on the terminal are most often sent as a sequence of three
characters:

27, '[', 'A' ... up
27, '[', 'B' ... down
27, '[', 'C' ... right
27, '[', 'D' ... left

27 is escape.

I don't know why you'd want to check for cursor keys but if it's for
line editing you're probably better of with using a library that
already does this. I'm not 100% sure but Highline (http://
highline.rubyforge.org/) might be of help here.

Isn't readline already distributed with ruby by default? Why write a
ruby version of a standard ruby library?