From: Derek Lewis <lewisd@...00f.net>
Date: 2003-12-12T08:01:34+09:00
Subject: Re: Appending to an array


The "p" method is awefully handy:

a = []
b = []
c = [1,2,3]
a << c
b += c
p a   # => [[1, 2, 3]]
p b   # => [1, 2, 3]

"puts a" and "puts b" both display the same thing:
1
2
3

Not very helpful :)


On Fri, 12 Dec 2003, Thomas Adam wrote:

>  --- Jamis Buck <jgb3@email.byu.edu> wrote:
>
> > Thomas Adam wrote:
> >
> > >vthread << File.new(pathname,
> > >"r").readlines().to_s().grep(/^foobar/).uniq()
> > >
> > >
> >
> > The << operator for array only appends the single object given to the
> > end of the array--it does not concatenate one array onto another.  What
> > you probably want is the += operator:
> >
> >   vthread += File.new(...).grep(/^foobar/).uniq()
> >
> > (Assuming, of course, that vthread is an array.)
>
> James,
>
> Many thanks for that!! True genius. Solved it completely. I wonder why I
> never thought of it myself :)
>
> kudos_Points++;
>
> :)
>
> -- Thomas Adam
>
> =====
> "The Linux Weekend Mechanic" -- http://linuxgazette.net
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>
> ________________________________________________________________________
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>

Derek Lewis

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