From: dave.burt@...
Date: 2005-10-28T12:42:05+09:00
Subject: Re: difference between the each iterator and the collect iterator?

Collect is called for the return value:

[1, 2, 3, 4].collect {|i| puts i } #=> [nil, nil, nil, nil]

Another transformation might be:

[1,2,3,4].collect {|i| i * 2 } #=> [2, 4, 6, 8]

Each just returns the original collection, but we usually call each
just as an iterator, while we call collect to get the transformed
result.

Cheers,
Dave