From: Dave Thomas <Dave@...>
Date: 2000-12-13T04:37:25+09:00
Subject: [ruby-talk:7100] Re: Rubyize this method

Aleksi Niemel� <aleksi.niemela@cinnober.com> writes:

> Morris Chris asked:
> 
> > I'd hoped there was a built in 
> > string method to do what this does
> 
> I'm not sure there's a method for this. I guess there's not. But it's not
> too hard to do by yourself, and even easy enough to write inline when
> needed. But here's an example of wrapped version.
> 
> I'd use the name you've chosen (if it's good), and use regexps:
> 
>   class String
>     def lopOff(substr)    # actually pattern might be better name
>       sub!(substr, "")    # and sub!(/^#{substr}/, "") better
>     end                   # implementation
>   end
> 
>   a = "test this"
>   p a   #=> "test this"
>   a.lopOff("tes")
>   p a   #=> "t this"

Not quite the same, though. Chris' method

    lopOff("fred", "e") would return "d"
    "fred".lopOff("e")  would return "frd"

If the latter is acceptable, then

    s[substr] = ""

is another idiom.


Dabe