An example where a function pointer parameter is used to define the function’s own behavior can be found in the C standard library’s Quick Sort function, qsort(), which takes a compare ...

For example, in Python, the map function takes a function as an argument. Suppose you have a list and you want to capitalize each word in the list.

I know many other languages use the eval() function to take a string argument and evaluate it as part of the source code (so you can run a function or assign a variable etc). I've seen it in PHP ...