From: Dave Bass <davebass@...>
Date: 2008-07-14T23:52:37+09:00
Subject: Re: Factorials

Victor Reyes wrote:
> I guess my problem is understanding the role of the *inject* method.

Same problem here. But I figured out it's ideal for calculating 
summations and products, where you'd use a big Sigma or Pi in 
mathematics. :-)

Surprisingly Fortran never had Sigma or Pi constructs; we had to roll 
our own using a DO loop. Same for subsequent languages. Ruby is the 
first language I've come across with it built in.

Maybe someone would explain why it's called "inject" though?

Dave
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