From: Tom Rauchenwald <its.sec@...>
Date: 2006-05-25T14:56:18+09:00
Subject: Re: Regexp to esclude substrings

vincent <dontspam@dontspam.com> writes:

> I'm trying to resolve a very simple problem, but I'm encountering some 
> issues.
>
> Input: "this is a string where you can find some words"
> Output: [this, string, where, can, find, some, words]
>
> So I'm trying to eliminate ' is ', ' a ' and ' you ' from the string 
> (note the spaces, 'this' shouldn't be eliminated just because it 
> includes 'is').
>
> I tried the following (and many others), but it doens't work:
> my_string = input_string.gsub!(/\s+(is|a|you)\s+/i,' ').split
>
> Any hints?

Well, since you want an array of the words back, why don't you do
something like

my_string.split.reject { |word| word =~/^(is|a|you)$/ }
or
my_string.split.reject { |word| %w(is a you).include? word }

Seems simpler to me than to replace the words in the string and then
split it into an array.

Tom

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