From: Robert Dober <robert.dober@...>
Date: 2006-08-28T23:25:38+09:00
Subject: Re: Newbie : assign a value to a variable...

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On 8/28/06, Nicolas Blanco <slainer68@gmail.com> wrote:
>
> Hi all!
>
> This is really a newbie question...
>
> Here is the simple code...
>
> if @params[:per_page].nil?
>       per_page =3D 20
>     else
>       per_page =3D @params[:per_page]
> end


You got very bright answers from very good people, or was it the other way
round?

The answers were of type
    var =3D val || default_val

As it seems that you are accessing a Hash object, you could do the followin=
g
which is semantically different and this is the main reason I anwser your
post.

per_page =3D @params.fetch( :per_page, 20 )

Now where is the difference:

if @params does not contain the key :per_page, 20 is returned, however if
@params[:per_page] was set to nil or false, nil or false is returned
accordingly


It is up to you to know what you need :)

Hope that helps
Robert

Is there a better way to do this (put the parameter in the variable if
> the parameter is not null, otherwise put 20) ?
>
> Thanks...
>
> Nicolas
>
> --
> Posted via http://www.ruby-forum.com/.
>
>


--=20
Deux choses sont infinies : l'univers et la b=EAtise humaine ; en ce qui
concerne l'univers, je n'en ai pas acquis la certitude absolue.

- Albert Einstein

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