Java - JFR performance regression unit test

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JFR unit test framework allow to have a performance regression test by using JFR events.

C++ - Immediately Invoked Lambda Expression

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Immediately Invoked Lambda Expression technique on initialize the singleton

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enum_cast can detect wrong case in compile time by using a constexpr with static_assert

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Interesting C++ template meta programming without template

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C++20 introduced the constinit which will initialize the value at compile time but still you can modify it at runtime