From: dblack@...
Date: 2006-12-03T10:30:06+09:00
Subject: Re: rexexp question

Hi --

On Sun, 3 Dec 2006, ishamid wrote:

> [total novice again ;-)]
>
> Hi,
>
> Ok, I've figured some of this pattern-matching out (yes, I'm really a
> total novice at programming). Consider the following:
>
> ====================================
> @data.gsub!(/<(text:span
> text:style-name="T10")>(.*?)<\/text:span>/mois) do
>    '{' + '\bf ' + $2 + '}'
> end
> @data.gsub!(/<(text:span
> text:style-name="Style2")>(.*?)<\/text:span>/mois) do
>    '{' + '\it ' + $2 + '}'
> end
> @data.gsub!(/<text:span.*?text:style-name=([\'\"])(.*?)\1>(.*?)<\/text:span>/)
> do
>    tag, text = $2, $3
>    if inline[tag] then
>        (inline[tag][0]||'') + clean_display(text) +
> (inline[tag][1]||'')
>    else
>        clean_display(text)
>    end
> end
> ====================================
>
> How can I condense this? I want something that says, eg.
>
> If style-name equals "T10" or "Style2" or "Style3" then do \bf or \it
> or \sl respectively. Otherwise, do clean_display (defined elsewhere).
> The first line should look like this
>
> ==================
> @data.gsub!(/<(text:span
> text:style-name=("T10"|"Style2"|"Style3"))>(.*?)<\/text:span>/mois) do
> ==================
>
> but how do I modify the
>
> ==================
>    '{' + '\bf ' + $2 + '}'
> ==================
>
> line?

You could perhaps have a hash:

   replacements = { '"T10"' => "bf", '"Style2"' => "it", '"Style3"' => "sl" }

and then replace from the hash:

   "{\\#{replacements[$1]}#{$2}}"

or something like that.


David

-- 
                   David A. Black | dblack@wobblini.net
Author of "Ruby for Rails"   [1] | Ruby/Rails training & consultancy [3]
DABlog (DAB's Weblog)        [2] | Co-director, Ruby Central, Inc.   [4]
[1] http://www.manning.com/black | [3] http://www.rubypowerandlight.com
[2] http://dablog.rubypal.com    | [4] http://www.rubycentral.org