From: jason joo <jasonjoo.god@...>
Date: 2010-08-11T14:03:30+09:00
Subject: Re: Hel;p with Tip Calculator

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aha, i forgot positive number and dot. then the regular expression should
be /([\-+]?\d*[.]?\d*)/

eg

if input_string =~ /([\-+]?\d*[.]?\d*)/
    input_string = $1
else
    #have no number part
    input_string = 0
end

9  => "9"
-9  => "-9"
-9.098 => "-9.098"

2010/8/11 Hassan Schroeder <hassan.schroeder@gmail.com>

> On Tue, Aug 10, 2010 at 6:38 PM, jason joo <jasonjoo.god@gmail.com> wrote:
> > or just
> >>> input_string.to_s.gsub(/\D/,'')
> > for number format permitted
>
> Depending on what your actual numeric use case is  :-)
>
> $ irb
> >> input = 9
> => 9
> >> input.to_s.gsub(/\D/,'')
> => "9"
> >> input = 9.095
> => 9.095
> >> input.to_s.gsub(/\D/,'')
> => "9095"
> >>
>
> --
>  Hassan Schroeder ------------------------ hassan.schroeder@gmail.com
> twitter: @hassan
>
>

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