From: mgarriss <mgarriss@...>
Date: 2003-08-26T03:17:32+09:00
Subject: Extra Array methods?

I have been using a little extension of Array that I wrote for awhile:

class Array
 def and?() each{|e| return false unless yield e }; true  end
 def or?()  each{|e| return true if yield e };      false end
end

 > [1,2,3].and?{|e| e>0}
=> true
 > [1,2,3].and?{|e| e>1}
=> false
 > [1,2,3].or?{|e| e>1}
=> true
 > ['this','that'].and?{|e|e.size==4}
=> true
 > ['this','that'].and?{|e|e=~/th/}
=> true
 > ['this','that'].and?{|e|e=~/at/}
=> false
 > ['this','that'].or?{|e|e=~/at/}
=> true
 > [proc{|a|a.size==4},proc{|a|a=~/th/}].and?{|e|e.call("this")}
=> true
 > [proc{|a|a.size==4},proc{|a|a=~/th/}].and?{|e|e.call("these")}
=> false

etc...

Then I discovered Array#detect because of a post by Jason Creighton, he 
used it in his WrapHash class (btw, nice class Jason).  So I run to irb 
and played with #detect.  It's cool and I'll be using it but it's not a 
replacement for my #and? and #or? methods.  I still have to mess with 
Array myself.

I looked for docs on Array#detect on http://www.rubycentral.com/ref/ and 
I even looked in array.c (that was a big move for me).  No luck.  My 
question is this:  Where are these "extra" array methods documented? And 
is there something already in Array that does what my #and? and #or? 
methods do?

Michael Garriss