From: "Shot (Piotr Szotkowski)" <shot@...>
Date: 2010-01-19T19:40:47+09:00
Subject: Re: string to int

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Jes=C3=BAs Gabriel y Gal=C3=A1n:

> On Tue, Jan 19, 2010 at 11:13 AM, Phillip Curry <philfo@gmail.com> wrote:

>> Is there a nice way to convert a string to an integer if it is in
>> fact an integer, and to return nil or even an error if it's not?

> Try this:

> irb(main):002:0> Integer("12")
> =3D> 12
> irb(main):003:0> Integer("fdfdf")
> ArgumentError: invalid value for Integer: "fdfdf"
> 	from (irb):3:in `Integer'
> 	from (irb):3
> 	from :0
> irb(main):005:0> Integer("12ijk")
> ArgumentError: invalid value for Integer: "12ijk"
> 	from (irb):5:in `Integer'
> 	from (irb):5
> 	from :0

=E2=80=A6and if you=E2=80=99d rather get nil, you can try rescuing the exce=
ption inline:

>> Integer('12')
=3D> 12
>> Integer('fdfdf') rescue nil
=3D> nil
>> Integer('12ijk') rescue nil
=3D> nil

=E2=80=94 Shot
--=20
We have things like protected properties. We have abstract methods.
We have all this stuff that your computer science teacher told you
you should be using. I don=E2=80=99t care about this crap at all.
                                            [Rasmus Lerdorf on PHP]

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