From a5b273033b849e37e87899a374101d3562098d39 Mon Sep 17 00:00:00 2001
From: Denis Knauf <Denis.Knauf@gmail.com>
Date: Wed, 23 Jun 2010 17:01:01 +0200
Subject: [PATCH] more example in README.md

---
 README.md | 41 +++++++++++++++++++++++++++++++++++++++--
 1 file changed, 39 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index d625a86..c8db4a8 100644
--- a/README.md
+++ b/README.md
@@ -8,8 +8,45 @@ Usage
 
 	require 'functional'
 	
-	obj = 0 .. 10**12
-	Functional.new( obj).select {|i| i.even? }.collect {|i| i/3 }.select {|i| i.even? }.each &method( :puts)
+	# To demonstrate Functional, we create a Class with a infinite loop:
+	class Sequence
+		include Enumerable
+		def initialize first = 0, step = 1
+			@i, @step = first, step
+		end
+		def each
+			# Our infinite loop:
+			loop do
+				yield @i
+				@i += @step
+			end
+		end
+  end
+	
+	Functional.new( Sequence.new).
+		select {|i| i.even? }.
+		collect {|i| i/3 }.
+		select {|i| i.even?}.
+		collect {|i| [[[[[[i.even?, i.odd?]]], i, [[[[[[i.class]]]]]]]]] }.
+		flatten. # It flattens everything! Not like: collect {|i| i.flatten }.
+		p
+	
+	# Without Functional... Bye bye.
+	Sequence.new.
+		select {|i| i.even? }.
+		collect {|i| i/3 }.
+		select {|i| i.even?}.
+		collect {|i| [[[[[[i.even?, i.odd?]]], i, [[[[[[i.class]]]]]]]]] }.
+		flatten. # It flattens everything! Not like: collect {|i| i.flatten }.
+		p
+
+It will never realize, that #p doesn't exists, because the first select runs endless.
+Functional#p prints everything to stdout.
+
+	(0..100000).to_fun.
+		collect {|i| i*3 }.
+		select {|i| i%5 == 2 }.
+		to_a
 
 What's with _#map_?
 =================