From: Rick DeNatale <rick.denatale@...>
Date: 2008-01-05T02:52:37+09:00
Subject: Re: Enumerable#zip Needs Love

By the way the RDOC for Enumerable#zip for 1.9 seems to need some work:

k$ ri1.9 Enumerable#zip
--------------------------------------------------------- Enumerable#zip
     enum.zip(arg, ...)                   => enumerator
     enum.zip(arg, ...) {|arr| block }    => nil
------------------------------------------------------------------------
     Takes one element from _enum_ and merges corresponding elements
     from each _args_. This generates a sequence of _n_-element arrays,
     where _n_ is one more that the count of arguments. The length of
     the sequence is truncated to the size of the shortest argument (or
     _enum_). If a block given, it is invoked for each output array,
     otherwise an array of arrays is returned.

        a = [ 4, 5, 6 ]
        b = [ 7, 8, 9 ]

        [1,2,3].zip(a, b)      #=> [[1, 4, 7], [2, 5, 8], [3, 6, 9]]
        [1,2].zip(a,b)         #=> [[1, 4, 7], [2, 5, 8]]
        a.zip([1,2],[8])       #=> [[4,1,8]]

Note that although the signature says that calling it without a block
will return an enumerator, the examples show it returning an array.



-- 
Rick DeNatale

My blog on Ruby
http://talklikeaduck.denhaven2.com/