From: Mirko Viviani <furetto76@...>
Date: 2009-07-23T18:23:11+09:00
Subject: Re: Ruby "star".... what's it?

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Sorry,
Complete code was like this
x,  *xs =3D *myarray

after executing, x is 1 and xs [2,3,4,5,6,6] ..... :o

2009/7/23 Max Williams <toastkid.williams@gmail.com>

> Mirko Viviani wrote:
> > Hi everybody.
> > What means this snippet of code? Why use the "star" ?
> >
> > myarray =3D [1,2,3,4,5,6,6]
> > qa =3D *myarray
> >
> > Thank you.
>
> In this example it doesn't really do anything, i think.  Normally you
> would use the * in an argument list, in a method definition, to
> effectively say 'pull all arguments after this into a single array', eg
>
> >> def foo(mainarg, *otherargs)
> >>   puts mainarg.inspect
> >>   puts otherargs.inspect
> >> end
> =3D> nil
> >> foo(1,2,3,4,5,6)
> 1
> [2, 3, 4, 5, 6]
> =3D> nil
>
> In this sense it's like * in a regular expression, meaning 'any number
> of arguments'.  That's how i understand it anyway, a more precise
> description will probably be forthcoming :)
> --
> Posted via http://www.ruby-forum.com/.
>
>


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