Key tools for C++ container library performance are guaranteed copy elision and guaranteed return value optimization. One trick for library writers (which needn't complicate life for library users) is:pic.twitter.com/WFtJx7TGBe
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After I spent some time with Pascal I started using "result" everywhere by convention. Later I switched to "ans" (answer) because it's nice and compact.
Tim, what is this for. I really do not understand this
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