From: Robert Dober <robert.dober@...>
Date: 2007-07-11T14:55:29+09:00
Subject: Re: Help: Efficient regular expression

On 7/10/07, Divya Badrinath <dbadrinath@dash.net> wrote:
<snip>
> cmd = string[/\s(\S+)$/, 1]
> doesnt fetch me anything:)
No idea that was not my code :)
>
> program=string.split.last
> what if
> string = "root     14051 14033  3 08:39 pts/2    00:00:00 /bin/bash -x
> -s"
> it fetches only -s for me.
As simple as possible, but not simpler. Now we are in the simpler case :)
But see below

>
> program=string[/[a-z\/]+$/]
> the command column mauy start with character. i dont want to limit it in
> my regexp. it has to be generic.
>
> with all your comments, i tried
>       pid = run_process[/\s(\d+)/, 1]
>       cmd = run_process[/:\d+:\d+\s(\S.*)\s$/, 1]
Does not work the :\d+ stuff might be a parameter of the program :(
>

> is there any other way?
Yep :) counting fields after all
   x = split
   y= x[1]
   z = x[7..-1].join(" ")

There might still be a pitfall though in case of some old processes
where you will have to analyse if the date takes one or two fields if
memory serves.

HTH
Robert



-- 
I always knew that one day Smalltalk would replace Java.
I just didn't know it would be called Ruby
-- Kent Beck