From: "David A. Black" <dblack@...>
Date: 2008-10-01T22:41:03+09:00
Subject: Re: String delete method help

Hi --

On Wed, 1 Oct 2008, Keith Johnston wrote:

> Hi,
>
> Yes, that helped. I was able to achieve what I thought the delete
> function was doing by using String#sub! with a regular expression to
> remove any charaters between "http" and "com".
>
> string = "http://groups.google.com/group/ruby-talk-google/".sub!(/
> http.*com/, "")

It's a bit dangerous to chain sub! (and, indeed, the ! means that this
is the dangerous version of sub, so it's always a good idea to check
the docs, since "danger" can mean many things).

str = "hello".sub!(/x/, 'y')
=> nil

That won't happen with your string but I'd still tend to steer clear
of assigning directly from a sub! call.


David

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