iterable-unpacking

“unpacking” a tuple to call a matching function pointer

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I’m trying to store in a std::tuple a varying number of values, which will later be used as arguments for a call to a function pointer which matches the stored types. I’ve created a simplified example showing the problem I’m struggling to solve: #include <iostream> #include <tuple> void f(int a, double b, void* c) { … Read more

What does the star and doublestar operator mean in a function call?

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What does the * operator mean in Python, such as in code like zip(*x) or f(**k)? How is it handled internally in the interpreter? Does it affect performance at all? Is it fast or slow? When is it useful and when is it not? Should it be used in a function declaration or in a … Read more