added JSDoc

Author: OpenByteDev

lib/extensions.ts

@@ -6,6 +6,10 @@ interface Array<T> {
     flatMap<TResult>(lambda: (e: T) => TResult[]): TResult[];
 }
 
+/**
+ * @param str The string against which to match the regular expression.
+ * @return An array containing the results of the RegExp.prototype.exec method until no match is found.
+ */
 RegExp.prototype.execAll = function(str: string): any[] {
     const arr: any[] = [];
     let tmp;
@@ -19,8 +23,13 @@ RegExp.prototype.execAll = function(str: string): any[] {
     return arr;
 };
 
+/**
+ * @param callback Function that produces an Array, taking three arguments.
+ * @param thisArg Value to use as this when executing callback.
+ * @return A new array with each element being the flattened result of the callback function.
+ */
 Array.prototype.flatMap = function<T1, T2>(
-    lambda: (currentValue: T1, index: number, array: T1[]) => T2[],
+    callback: (currentValue: T1, index: number, array: T1[]) => T2[],
     thisArg?: any): T2[] {
-    return Array.prototype.concat.apply([], this.map(lambda, thisArg));
+    return Array.prototype.concat.apply([], this.map(callback, thisArg));
 };