From: Raj Sahae <rajsahae@...>
Date: 2007-03-02T06:56:55+09:00
Subject: dup and clone

Why?

irb(main):012:0> a = 5
=> 5
irb(main):013:0> a.class
=> Fixnum
irb(main):014:0> a.methods.include?("dup")
=> true
irb(main):015:0> a.methods.include?("clone")
=> true
irb(main):016:0> a.dup
TypeError: can't dup Fixnum
    from (irb):16:in `dup'
    from (irb):16
    from :0
irb(main):017:0> a.clone
TypeError: can't clone Fixnum
    from (irb):17:in `clone'
    from (irb):17
    from :0
irb(main):018:0>