Adding an array function map. Minor wording edits. Updating license year.

Author: adam-rumpf

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2020 Adam Rumpf
+Copyright (c) 2021 Adam Rumpf
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -22,6 +22,7 @@ A variety of scripts dealing with sequences, functions, and sets, which may have
 Common array functions (such as searching and counting).
 
 * [`_array_count`](https://github.com/adam-rumpf/game-maker-scripts/blob/master/scripts/_array_count/_array_count.gml): Counts the number of occurrences of a specified value in an array.
+* [`_array_function`](https://github.com/adam-rumpf/game-maker-scripts/blob/master/scripts/_array_function/_array_function.gml): Applies a given function to every element of a given array, and returns an array of results.
 * [`_array_index`](https://github.com/adam-rumpf/game-maker-scripts/blob/master/scripts/_array_index/_array_index.gml): Finds the first index at which a specified value occurs in an array (or -1 if not found). An optional argument allows the search to begin from a specified index.
 * [`_array_max`](https://github.com/adam-rumpf/game-maker-scripts/blob/master/scripts/_array_max/_array_max.gml): Returns the maximum value (or the index of the maximum value) in an array.
 * [`_array_min`](https://github.com/adam-rumpf/game-maker-scripts/blob/master/scripts/_array_min/_array_min.gml): Returns the minimum value (or the index of the minimum value) in an array.

scripts/_random_weighted_index/_random_weighted_index.gml

@@ -23,7 +23,7 @@ function _random_weighted_index(wt)
 
 	// Find which interval this number belongs to
 	var i = 0;
-	while (r > 0 && i < n)
+	while ((r > 0) && (i < n))
 	{
 		r -= wt[i];
 		i++;

scripts/_range/_range.gml

@@ -1,4 +1,4 @@
-/// @func _range(start, stop[, step]])
+/// @func _range(start, stop[, step])
 /// @desc Generates an array of equally-spaced values over a specified range with a specified step size.
 /// @param {real} start First value of array.
 /// @param {real} stop Final value of array (if the step size evenly divides the array; otherwise gives an upper bound to the final value).