From: "Aleksi Niemelä" <aleksi.niemela@...>
Date: 2001-01-09T20:38:28+09:00
Subject: [ruby-talk:8916] Hash#index !==> Hash#indexes

After I've learned Hash#index I'd expect I'm able to guess correctly what
Hash#indexes does. But I'm not.

  h = {"abc" => 123, "def" => 456}
  list = h.keys + h.values
  a = list.collect { |obj| h.index(obj) }
  b = h.indexes(*list)
  p list, a, b
  p a==b

outputting:

  ["def", "abc", 456, 123]
  [nil, nil, "def", "abc"]
  [456, 123, nil, nil]
  false

I'd expect the last line to be true (that is, the a way and the b way to be
equivalent). Is there something wrong in my expectations?

	- Aleksi