Comments on: Using select, reject, collect, inject and detect.

By: Matthew

Matthew — Tue, 09 Dec 2008 05:00:41 +0000

You’re right Josh. Nice catch. Thanks.

By: Vojtech Salbaba

Vojtech Salbaba — Thu, 27 Nov 2008 18:57:25 +0000

Nice work with the inject, thank you.

By: Ed

Ed — Tue, 01 Jul 2008 04:59:34 +0000

Simple yet good explanation

By: Travis

Travis — Sat, 28 Jun 2008 04:59:57 +0000

very nicely explained, good job! simple and to the point.

By: Mike Breen

Mike Breen — Fri, 27 Jun 2008 05:00:16 +0000

Nice post. Coming from .NET to Ruby I certainly went through this learning process when working with arrays.

By: Sam Aaron

Sam Aaron — Wed, 25 Jun 2008 05:03:11 +0000

Very nicely written post, thanks. My only point is that I use the synonym map instead of collect, although I’m not really sure why, and it might help people starting out to know that map and collect are actually the same thing. Keep it up!

By: curtis

curtis — Wed, 25 Jun 2008 05:02:37 +0000

The for..in is functionally identical to for each. What would be really unforgivable is if someone did this in any case that an iterator based loop would do: a = [1,2,3,4] 1.upto(a.length-1) do |i| foo(a[i]) end

By: Josh

Josh — Wed, 25 Jun 2008 05:02:10 +0000

In this example the result is 20 because we assigned the accumulator an initial value of 20.

I think you meant 10… Otherwise, great article!

By: Dan Manges

Dan Manges — Wed, 25 Jun 2008 05:01:14 +0000

I also use any? and all? fairly regularly. Although not as often as the methods you mentioned.

By: chad

chad — Tue, 24 Jun 2008 05:04:08 +0000

brilliant.