From: Robert Klemme <shortcutter@...>
Date: 2009-11-23T17:33:27+09:00
Subject: Re: How to match and count

2009/11/23 Ruby Newbee <rubynewbee@gmail.com>:
> 2009/11/22 Robert Klemme <shortcutter@googlemail.com>:
>
>> ruby -nae 'BEGIN {$i=0}; $i+=1 if /something/ =~ $F[3]; END {puts $i}'
>> file.txt
>> ruby -nae 'BEGIN {$i=0}; /something/ =~ $F[3] and $i+=1; END {puts $i}'
>> file.txt
>>
>
> oops this is the same way as Perl's.
>
> I may adjust one point:
>
> should be:
> $F[3] =~ /something/;
>
> not:
>  /something/ =~ $F[3];

Why?

> After that replace "ruby" to "perl" on above commands and that will be
> working too.

Ah, you want a single program to work both for Perl and Ruby.  Thanks
for sharing!

I usually prefer to have the regular expression as the first argument
to =~ because for me that seems more natural (the regexp is doing the
matching) and IIRC it is a tad faster (but really only a tad).

Kind regards

robert


-- 
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/