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What Are The Differences Between std::rand() And std::mt19937 In Modern C++?

Random numbers are widely used in today’s modern applications. In C we use rand(), srand() and in C++ it is std::rand(), std::srand(). Since C++11, we can use the Mersenne Twister random generators;  mt19937 (std::mt19937) for 32-bit applications and mt19937_64 (std::mt19937_64) for 64-bit applications. Modern C++ allows us to use both old and new random generators. In this post, we explain…
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How To Use std::invoke In C++ 17?

There is a new library feature in the C++17 standard, it is std::invoke which is a useful feature to uniformly invoke callable entities. In this post, we explain what std::invoke is and how we can use it in examples. First, let’s remind ourselves about what is a callable object and what is a functor in modern C++. What is callable object and what is functor in modern…
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What Is The New std::sample Algorithm In C++ 17?

The C++ 17 standard bring us a lot of useful methods, templates and algorithms. One of the great algorithms is std::sample defined in the <algorithm> header that samples at most n elements uniformly from a given range. In this post, we explain the std::sample algorithm and how we can use it with an mt19937 random generator. What is the std::sample algorithm in C++ 17 and beyond? The…
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What Is The New Optional Class Template In C++ 17?

The C++17 standard came with a lot of great features and std::optional was one of the main features of today’s modern C++. std::optional<T> is a class template that is defined in the <optional> header and represents either a T value or no value. In this post, we explain, what is optional in modern C++ and how we can use it efficiently. What is the optional class template in C++ 17…
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