From: Hector <HQuiroz@...>
Date: 2006-03-03T11:30:55+09:00
Subject: Re: gsub wrapper

Timothy Goddard wrote:

> str = "We love Ruby"
> puts str.gsub(/We (\w+) \w+/, 'Why do we \1 it?')
> puts str.gsub(/(\w+)$/, "it because \\1 allows us to do cool stuff!")


First, thanks to everyone for your input.

But I wanted to be able to invoke 'gsub' with end-user specified strings
for both the regex pattern and the replacement string. If the end-user
regex patern contains regexp groupings and the replacement string
contains any of $1, $2, ... $9, these variables($1,$2...) will not get
interpolated because they are within a string object. The non-block
version of gsub works fine but I need more flexibility.

Maybe a sample invokation of the script would help explain what I want.
Here's a sample:

INPUT_STRING = 'This is getting to be a bear!'
script invokation -> snr.rb -regex'(\W)+(\w\w)(\W)+'
-replacement'$1->$2<-$3'

Should display -> 'This ->is<- getting ->to<- ->be<- a bear!'

I'm finding it hard to explain exactly what it is I am looking for -
simple concept but difficult for me to explain.

Again, thank you for your help.


Hector

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