From: Andrew Timberlake <andrew@...>
Date: 2009-04-02T21:00:05+09:00
Subject: Re: String#capitalize more complex

On Thu, Apr 2, 2009 at 1:55 PM, Iñaki Baz Castillo <ibc@aliax.net> wrote:
> Hi, I receive headers (the protocol syntax allows them being lowcase,
> upcase or a mix). For example, the following header names are
> equivalent:
>
> a) Record-Route
> b) record-route
> c) RECORD-ROUTE
> d) Record-ROUTE
>
> I'm trying to do a method to convert all of them to:
>
>  Record-Route
>
>
> Basically what I need is to capitalize all the header name parts after
> splitting it using "-" as separator. I can do it as follows:
>
> ------------
> hname =  "Record-ROUTE"
> hname.split("-").map {|w| w.capitalize }.join("-") }  =>  "Record-Route"
> ------------
>
> Benchmark.realtime { hname.split("-").map {|w| w.capitalize }.join("-") }
> 1.69277191162109e-05
>
>
> Is there any option even faster? I think it would be faster if I
> operate directly in the original string instead of doing "split" and
> "join" (since these last methods create more strings so allocate
> memory for them and so). I would prefer to do the modification "in
> place".
>
> BTW, could I know how to convert "a" char into "A"? I expected
> something as in c:
>
>  'a' + 1 => 'b'
>  'a' + ¿X? => 'A'
>
> but in Ruby#String I just find String#next which just increment the
> char in one unit ("a".next => "b").
>
> Any suggestion? Thanks a lot.
>
> Thanks a lot.
>
>
> --
> Iñaki Baz Castillo
> <ibc@aliax.net>
>
>

Have a look at Net::HTTPHeader and it's code as all of this is handled in there
http://www.ruby-doc.org/core/classes/Net/HTTPHeader.html

Andrew Timberlake
http://ramblingsonrails.com
http://www.linkedin.com/in/andrewtimberlake

"I have never let my schooling interfere with my education" - Mark Twain