From: Robo <robo@...>
Date: 2004-10-12T14:39:40+09:00
Subject: Re: Ruby programming styles and new program?

Bill wrote:
> One problem: I cannot find documentation for the Dir.inject method. I 
> assume from some of the Ruby docs this is like the Smalltalk inject 
> method, but I don't know why it's not documented in the Dir class?
> 

The Dir class includes the Enumerable module (like most classes that has 
a 'each' method), and that module has the inject method.

> Anyway, what, exactly, is happening in the line (typo removed)
> 
>  >      moved = dir.inject(0) do |count, logfile|
> 
> and how do you know to put the | count, logfile | variables in that 
> order, and not | logfile, count | ?
> 

Go to the doc for Enumerable#inject and you'll see the description for it.

Robo