From: Rob Biedenharn <Rob@...>
Date: 2008-04-26T01:47:26+09:00
Subject: Re: Array inject function problem

On Apr 25, 2008, at 12:20 PM, Inbroker Adams wrote:

> Thanks so much guys.
> So the sum =[1,3,5].inject() {|sum, element| sum + element;}
> runs on both 1.8 and 1.9 right???
> 1.9 Ruby is in beta? (haven't seen it yet)
> not on the official site neither on the netbeans 6.1 RC2 that i just
> installed


Yes, but if the array is empty [] rather than 0 you'd get nil.  If you  
don't want that behavior, provide the initial value for the  
accumulator as an argument:

sum = [].inject(0) {|sum, element| sum + element}

gives sum == 0

-Rob

Rob Biedenharn		http://agileconsultingllc.com
Rob@AgileConsultingLLC.com