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class Tree
def initialize
puts "Make a normal tree"
end
def decorate
puts "Make sure the tree won\'t fall"
end
end
class RedBalls < Tree
def initialize(tree)
@parent = tree;
end
def decorate
@parent.decorate
puts "Put on some red balls"
end
end
class BlueBalls < Tree
def initialize(tree)
@parent = tree;
end
def decorate
@parent.decorate
puts "Add blue balls"
end
end
class Angel < Tree
def initialize(tree)
@parent = tree;
end
def decorate
@parent.decorate
puts "An angel on the top"
end
end
tree = Angel.new(BlueBalls.new(RedBalls.new(Tree.new)))
tree.decorate


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#! /usr/bin/ruby
CONSTANT = 1
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Ruby 101£º·½·¨¶ÔÏó


Ruby 101£º·½·¨¶ÔÏó
Written by Allen Lee
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#include < ruby.h > //
static int id_sum;
int Values[] = {5, 10 ,15,-1,20,0};
static VALUE wrap_sum(VALUE args)
{
 VALUE * values = (VALUE *) args;
 VALUE summer = values[0]; 
 VALUE max = values[1];
 return rb_funcall(summer,id_sum,1,max);
}
static VALUE ......

Ruby on Rails°²×°ÓëÅäÖÃ

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