From: "David A. Black" <dblack@...>
Date: 2010-07-12T09:21:53+09:00
Subject: Re: Basic Question: How do you check to see if gets is a number?

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Hi --

On Mon, 12 Jul 2010, Rick DeNatale wrote:

> On Sun, Jul 11, 2010 at 4:53 PM, Brian Candler <b.candler@pobox.com> wrote:
>>> if age =~ /^d+$/ �# for an integer
>>
>> except that particular regexp allows strings which are not just numbers,
>> e.g.
>>
>>>> age = "foo\n123\nbar"
>> => "foo\n123\nbar"
>>>> puts "oops" if age =~ /^\d+$/
>> oops
>> => nil
>>
>> Use \A and \z to match start and end of the string.
>
> In general you are right, but ignoring my typo leaving out the \ in
> \d, in this case the string came from gets so the multi-line string
> case won't arise.

   >> $/ = "r"
   => "r"
   >> str = gets
   foo
   123
   bar
   => "foo\n123\nbar"

Yes, yes, I know :-)


David

-- 
David A. Black, Senior Developer, Cyrus Innovation Inc.

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