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class Point
@x = 1
@y = 2
def initialize(x,y)
@x,@y = x,y
end
end 
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class Point
include Enumerable
def initialize(x,y)
@x,@y = x,y
end
def each
yield @x
yield @y
end
end

puts Point.new(1,0).all? {|x|x==0}

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class Point
include Enumerable
attr_accessor :x,:y
def initialize(x,y)
@x,@y = x,y
end
def each
yield @x
yield @y
end
def ==(o)
if o.is_a? Point
@x == o.x && @y ==o.y
else
false
end
end
def eql?(o)
if o.instance_of? Point
@x.eql?(o.x) && @y.eql?(o.y)
else
false
end
end
end
a = Point.new(1,2)
b = Point.new(1.0,2.0)
puts "1"+ a.eql?(b).to_s
puts "2" + a.==(b).to_s 
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