From: RichardOnRails <RichardDummyMailbox58407@...>
Date: 2011-03-01T12:45:22+09:00
Subject: Re: Comining Arrays

On Feb 28, 4:46 pm, "David J.Hamilton" <gro...@hjdivad.com> wrote:
> Excerpts from Paul Sholtz's message of Mon Feb 28 12:31:12 -0800 2011:
>
> > That is, I'm stepping through one array, and then I'm "counting" to keep
> > track of where I am in the other array, so as to "add" the two arrays.
>
> > I know (before calling the routine) that both arrays are of the same
> > size, and that elements of the corresponding arrays will be added
> > together.
>
> Sounds like you want zip.
>
>   %w( a b c ).zip( 1..3 ).each {|l, d| puts "# l:#{l}, d:#{d}" }
>   # l:a, d:1
>   # l:b, d:2
>   # l:c, d:3
>   # => [["a", 1], ["b", 2], ["c", 3]]
>
> --
> med vänlig hälsning
> David J. Hamilton

Hey David,

Neat code,  but I don't get it.

%w( a b c ) yields an instance of class String.

%w( a b c ).zip( 1..3 ) invokes the ostensible zip method of the
String class with a Range instance as an argument.  But String has no
zip method.

So I misunderstand something about writing Ruby.  Would you be so kind
as to enlighten me.

Thanks in Advance,
Richard