From: Ammar Ali <ammarabuali@...>
Date: 2011-12-03T20:44:39+09:00
Subject: Re: Is there a better way to check this array?

On Sat, Dec 3, 2011 at 1:06 PM, Wayne Brissette <wbrisett@att.net> wrote:
> I have an array which contains items that need to be renamed. Unfortunately the way things are changed are based on a comparison of if something else exists. For example in this simple array:
>
>  names = ['sue,5', 'tom,6', 'jim,7', 'sally,8', 'fred,9', 'barney,0']
>
>
> if my logic was if look at jim, see if fred exists in array, if so, change jim to Jim_Brown.
>
> As I see it now I can't do a simple include? because my array isn't split properly. I've tried doing a grep, but that also doesn't work.
>
> ruby-1.9.2-p290 :020 > names = ['sue,5', 'tom,6', 'jim,7', 'sally,8', 'fred,9', 'barney,0']
>  => ["sue,5", "tom,6", "jim,7", "sally,8", "fred,9", "barney,0"]
> ruby-1.9.2-p290 :021 > names.include?('fred')
>  => false
> ruby-1.9.2-p290 :022 > names.grep('fred')
>  => []

grep should do what you want with a regular expression. Here are few
examples that you can try:

>> names.grep /fred/
=> ["fred,9"]
>> names.grep /^fred/
=> ["fred,9"]
>> names.grep /^fred,\d+/
=> ["fred,9"]
>> names.grep /^fred,\d+/i
=> ["fred,9"]
>> names.grep /\Afred,\d+\z/i
=> ["fred,9"]

Regards,
Ammar