From: Ruby Kk <kumartec@...>
Date: 2009-03-07T11:38:55+09:00
Subject: Re: text processing

Hi there,
I am new to ruby and trying to create a flat file with fixed column 
length. i have a header,footer and records that i want in the file.

any ideas?


Cheers!


Gary Wright wrote:
> On Mar 30, 2007, at 3:31 PM, Stephen Smith wrote:
>> {9})/.match(line).captures.join(',')
>> << "\n"
>> newLogg << record
>> record = ""
>> end
> 
> How about making it so you don't have to type that pattern next time:
> 
> def columns(*widths)
>    Regexp.new(widths.map {|count| "(.{#{count}})" }.join)
> end
> pattern = columns(6,15,3,30,4,15,1,12,9)
> 
> You also can get rid of the intermediate strings and the potentially
> huge
> internal array (from slurping up your oldLog into an array):
> 
> oldLog.each { |line|
>    newLog.print pattern.match(line).captures.join(',')
> }

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