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Apr 22, 2014 at 22:15 history edited Edward CC BY-SA 3.0
added missing const to `operator+`
Apr 22, 2014 at 22:07 history edited Edward CC BY-SA 3.0
added additional example using custom class
Apr 22, 2014 at 19:46 history edited Edward CC BY-SA 3.0
fixed typo
Apr 22, 2014 at 19:39 history edited Edward CC BY-SA 3.0
removed dependency on `operator==`
Apr 22, 2014 at 19:26 history answered Edward CC BY-SA 3.0