From: "Morris, Chris" <chris.morris@...>
Date: 2002-03-27T00:31:39+09:00
Subject: RE: yield in iterator's body -

> So, my question is, what exactly is the difference between 'each' and
> 'collect'?
> Why doesn't the 'each' block return the value of the last expression?

collect returns the newly built array. each simply returns the original
array.

---------------------------------------------------------- Array#collect
     arr.collect {| obj | block }  -> anArray
------------------------------------------------------------------------
     Returns a new array by invoking block once for every element,
     passing each element as a parameter to block. The result of block
     is used as the given element in the new array. See also
     Array#collect!.
        a = [ "a", "b", "c", "d" ]
        a.collect {|x| x + "!" }   #=> ["a!", "b!", "c!", "d!"]
        a                          #=> ["a", "b", "c", "d"]

------------------------------------------------------------- Array#each
     arr.each {| item | block } -> arr
------------------------------------------------------------------------
     Calls block once for each element in arr, passing that element as a
     parameter.
        a = [ "a", "b", "c" ]
        a.each {|x| print x, " -- " }
     produces:
        a -- b -- c --