From: botp <botpena@...>
Date: 2011-01-17T21:38:20+09:00
Subject: Re: A tad of meta-programming needed

On Mon, Jan 17, 2011 at 2:05 PM, Josh Cheek <josh.cheek@gmail.com> wrote:
> On Sun, Jan 16, 2011 at 11:30 PM, RichardOnRails <
> The matchdata object implements the same inteface as a hash. If that is all
> you need, on 1.9 you could just name the capture groups, then use the
> MatchData object and not have to do any assignment/creation at all.
> (Assuming this data is based on the pastie you posted earlier, this code
> would work)
> RUBY_VERSION # => "1.9.2"
> line = "Apple 1.1234 1/2/3 4/5/6 $1,234.56 $7 ($5)"
> regex = /^(?<name>       .+                       )\s
>          (?<n_shares>   \d+\.\d{4}               )\s+
>          (?<opened_MDY> \d\d?\/  \d\d?\/  \d\d?  )\s+
>          (?<closed_MDY> \d\d?\/  \d\d?\/  \d\d?  )\s+
>          (?<proceeds>   [\$\d,\.]+               )\s+
>          (?<cost>       [\$\d,\.]+               )\s+
>          (?<gain_Loss>  [\(\)\$,\d \.]+          )\s*
>        $/x
> result = regex.match(line)

or for older reg engines, they can do parallel assignments w array or splat

something like

_,:name,:n_shares,:opened = regex.match(line).to_a

or

_,:name,:n_shares,:opened = *regex.match(line)

best regards -botp