From: Phrogz <phrogz@...>
Date: 2007-12-23T12:30:00+09:00
Subject: Re: using a variable to build a regex

On Dec 22, 8:18 pm, Dave Thacker <dthac...@bluestrain.net> wrote:
> dthacker@buckbeak:~/learning/ruby$ irb
> irb(main):001:0> player="S_Avrul"
> => "S_Avrul"
> irb(main):002:0> player_line="S_Avrul ger 25 R 1 2 3 7 40 35"
> => "S_Avrul ger 25 R 1 2 3 7 40 35"
> irb(main):003:0> re=/player/
> => /player/
> irb(main):004:0> re.match(player_line)
> => nil
> irb(main):005:0>            
>
> How can I use the value of "player" to create the regex?

In a string literal, "player" would also be the actual string "player"
and not the value of that variable. Do you know how to substitute
inside a string? The same answer applies to Regexp literals in Ruby.

For a hint:
http://phrogz.net/ProgrammingRuby/language.html#substitutions

(In