taskPool.map() and taskPool.amap()

taskPool.map()

It helps to explain map() from the std.algorithm module before explaining taskPool.map(). std.algorithm.map is an algorithm commonly found in many functional languages. It calls a function with the elements of a range one-by-one and returns a range that consists of the results of calling that function with each element. It is a lazy algorithm, meaning it calls the function as needed. (There is also std.algorithm.each, which is for generating side effects for each element, as opposed to producing a result from it.)

The fact that std.algorithm.map operates lazily is very powerful in many ...