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class InterEx
def initialize(val=0)
@val=val
end

def to_s
@val.to_s
end

def [](idx)
self.to_s[idx].to_i
end

def []=(idx,val)
s=self.to_s
s[idx] = val.to_s
@val=s.to_i
end

def coerce(other)
[other,@val]
end

def <<(v)
return InterEx.new(@val) if v==0
InterEx.new(@val*10**v)
end

def >>(v)
return InterEx.new(@val) if v==0
s=self.to_s
s=s[0..(-1*v-1)]
InterEx.new(s.to_i)
end

def method_missing(mtd,*args)
InterEx.new(@val.send mtd,*args)
end

end
ruby»¹ÌṩÁËdelegate»úÖÆ±ãÓÚ´úÀíÒ»¸öÀ࣬±ÈÈçÒªÏë´úÀíFixnumÀ࣬
¿ÉÒÔÕâôд:
require 'delegate'
class InterEx<DelegateClass(Fixnum)
...
end



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