From: Jeff Wood <jeff@...>
Date: 2006-10-10T01:47:38+09:00
Subject: Re: How to remove  empty space in a string and others

Li Chen wrote:
>>> 2) I read each line from a file and split each of them into several
>>> fields/segments. Then I need to populate an array with one field only
>>> from each line. How do I do that? I know do these in Perl but have no
>>> idea using Ruby.
>>>       
>> Would need more information about your code to answer this.
>>     
>
> I have a file called array.txt with many lines and each line is a record 
> containing different fields separated by \t. What I like to do is read 
> the file line by line, split each line into elements, and push the 
> element [1] from each line into a new array.
>
> # array.txt
>
> A	B	C
> 1	2	3
> X	Y	Z
> ...
>
> expected output in new array
> [B,2,Y,...]
>
> Thanks,
>
> Li
>
>   
output = []
File.open( "array.txt" ) { |file| file.readlines { |curr_line|  output 
<< curr_line.split( /\t/ )[1] } }

# just to show the result
require 'pp'
pp output