From: Love U Ruby <lists@...>
Date: 2013-05-13T22:04:36+09:00
Subject: Unexpected output from Array#<< method.

I was writing a code,and doing so I got some unexpected result. Can
anyone point me by saying where I did wrong?


irb(main):001:0> a=["a","b","c"]
=> ["a", "b", "c"]
irb(main):002:0> a[-1].concat("j")
=> "cj"
irb(main):003:0> a<<a[-1].concat("j")
=> ["a", "b", "cjj", "cjj"]

My expected output is: ["a", "b", "c", "cjj"]

Thanks

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