From: "t3ch.dude" <t3ch.dude@...>
Date: 2009-11-11T05:00:09+09:00
Subject: Re: Ruby doesn't implement x++ for Fixnum's because ???

On Nov 7, 4:39 am, "David A. Black" <dbl...@rubypal.com> wrote:
> Hi --
>
>
>
> On Sat, 7 Nov 2009, Marnen Laibow-Koser wrote:
> > Michael W. Ryder wrote:
> > [...]
> >> .  I much prefer the
> >> simplicity of Basic and C with for loops that can go either direction.
>
> > That's because you're trying to write C in Ruby.  There are far more
> > idiomatic ways of doing things -- and they *are* clearer, at least in a
> > Ruby context.
>
> >> As far as going backwards I use it a lot to parse strings of the form
> >> "cityname ST 12345-6789" toCity,State, andZipCode fields.  I look
> >> for the first blank from the end of the string and assume everything
> >> after it is theZipCode, I then find the next two non-blank characters
> >> and assign them toState, and everything else is theCityname.
>
> > That's great in a language like C that doesn't have very good string
> > handling.  The Ruby way to do this would be
> >city,state,zip= string.split(/\s+/)
irb(main):004:0> str = "Washington Court House OH 43160"
=> "Washington Court House OH 43160"
irb(main):005:0> zip, state, city = str.reverse.split(/ /,3).map {|e|
e.reverse}
=> ["43160", "OH", "Washington Court House"]


>
> You'd need to take multi-wordcitynames into account, though. So
> maybe:
>
>    city,state,zip= /\A(.*)\s+(\S+)\s+(\S+)\Z/.match(str).captures
>
> David
>