refactor: change separate tools by category

core/stdlib/src/arrays/last/index.ts

@@ -0,0 +1,20 @@
+/**
+ * @name last
+ * @section Arrays
+ * @description Gets the last element of an array
+ * 
+ * @param {Value[]} arr The array to get the last element of
+ * @param {Value} [defaultValue] The default value to return if the array is empty
+ * @returns {Value | undefined} The last element of the array, or the default value if the array is empty
+ * 
+ * @example
+ * last([1, 2, 3, 4, 5]); // => 5
+ * 
+ * @example
+ * last([], 3); // => 3
+ * 
+ * @since 0.0.3
+ */
+export function last<Value>(arr: Value[], defaultValue?: Value) {
+  return arr[arr.length - 1] ?? defaultValue;
+}