From: "Radosław Bułat" <radek.bulat@...>
Date: 2008-03-26T23:35:57+09:00
Subject: Re: The inject function

> I want to add together numbers in an array with the inject command. I
>  want only the even numbers using only inject.
>
>  So, something like [1,2,3,4].inject.....but don't know what to do so
>  help!

puts [1, 2, 3, 4].inject(0) {|a, e| (e % 2 == 0) ? e + a : a }

>  Second, I need to reverse an array using only the inject command. So,
>  something like above with the result [4,3,2,1]

Use .reverse method. inject doesn't fit in.


-- 
Rados³aw Bu³at

http://radarek.jogger.pl - mój blog