Completed reverse string challenge (CoffeelessProgrammer#2 IP)

Author: CoffeelessProgrammer

Data-Structures/Arrays/My_Array_Implementation.ts

@@ -82,6 +82,7 @@ class MyArray<T> {
 }
 
 
+
 let helloArray = new MyArray<string>();
 
 helloArray.push('Hello');   // O(1)

Playground/Compare_Arrays.test.ts renamed to Playground/Interview-Prep/Compare_Arrays.test.ts

@@ -1,4 +1,4 @@
-import { assertEquals, assertNotEquals } from "../test_deps.ts";
+import { assertEquals, assertNotEquals } from "../../test_deps.ts";
 
 import { containsCommonItem } from "./Compare_Arrays.ts";
 

Playground/Compare_Arrays.ts renamed to Playground/Interview-Prep/Compare_Arrays.ts

@@ -0,0 +1,29 @@
+// Challenge: Reverse the characters of a string, preserving
+//    capitalization and spaces
+//
+// Example:
+//    Input — "Avatar the Last Airbender"
+//    Output — "rednebriA tsaL eht ratavA"
+
+function reverseString(input: string): string {
+  let reversed: string[] = [];
+
+  if (input.length > 1) {
+    for (let i = input.length; i > 0; --i) {
+      reversed.push(input.charAt(i-1));   // input[i-1] will also work in JS
+    }
+  }
+
+  return reversed.join('');
+}
+
+function reverseWithJavascriptVoodoo(input: string): string {
+  return input.split('').reverse().join('');
+}
+
+const reverseWithMoreVoodoo = (str: string) => [...str].reverse().join('');
+
+
+
+console.log(reverseString("ATLA"));
+console.log(reverseString("Avatar the Last Airbender"));

Playground/Interview-Prep/Reverse_String.ts

@@ -1,4 +1,4 @@
-// Problem: Given an array of unordered numbers and a sum,
+// Challenge: Given an array of unordered numbers and a sum,
 //   is there a pair of numbers which add up to the sum?