What are Variadic Functions?

Method signatures may include a fixed number of arguments whether its none, one, five, or twenty-five, at which point you’d probably want to refactor. The point is, the number of arguments is fixed by the method signature.

But what if it wasn’t? What if you could pass in an indeterminate number of arguments and have your function operate on all of them?

Well in some languages, you can. Say hello to variadic functions! A variadic function is a function that takes a variable number of arguments. While method signatures are easily recognizable when you switch languages, the big four have very different formats and requirements for a variadic function. Let’s look at C#, Python 3, Java, and JavaScript.

Example Code: https://github.com/MadDevSkilz/variadic-functions

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C# Documentation: https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/params

Java Example: https://stackoverflow.com/questions/2635229/java-variadic-function-parameters

https://stackoverflow.com/questions/33048359/in-python-can-you-pass-variadic-arguments-after-named-parameters

JavaScript rest parameters documentation: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/rest_parameters