From: Benoit Daloze <eregontp@...>
Date: 2011-04-09T23:18:28+09:00
Subject: [ruby-core:35676] Re: [Ruby 1.9 - Feature #4539][Assigned] Array#zip_with

Hi,
On 9 April 2011 10:29, Kenta Murata <muraken@gmail.com> wrote:
> Hi,
>
> I implemented the features in C, and wrote tests for them.
> Please see the following diffs:
> https://github.com/mrkn/ruby/commit/9c7ead0e385b6a17dafa5bc8b4389e1baf2e3040

Thank you, nice diff.

It would be nice to add the two examples from Michael Kohl:
  [1,2,3].zip([6,5,4], :+)                      #=> [7, 7, 7]
  [1,2,3].zip([6,5,4]) { |a,b| 3*a+2*b } #=> [15, 16, 17]

And of course do the same for Enumerable#zip.

Just a quick notice: in the tests, the arguments are reversed (it is
assert_equal(expected, actual, msg = nil)).
It is always hard to remember with test/unit, that is a reason why I
prefer the spec syntax in general.
It is definitely just a detail, but it could mislead someone reading a
failing test.