feat( curriculum): add string repeating lab (#61383)

client/i18n/locales/english/intro.json

@@ -3245,6 +3245,12 @@
           "In this lab, you will practice dividing an array into smaller arrays with the technique of your choice."
         ]
       },
+      "lab-repeat-a-string": {
+        "title": "Build a String Repeating Function",
+        "intro": [
+          "In this lab, you will implement loops to repeat a string a specified number of times."
+        ]
+      },
       "review-javascript-loops": {
         "title": "JavaScript Loops Review",
         "intro": [

client/src/pages/learn/full-stack-developer/lab-repeat-a-string/index.md

@@ -0,0 +1,9 @@
+---
+title: Introduction to the Build a String Repeating Function
+block: lab-repeat-a-string
+superBlock: full-stack-developer
+---
+
+## Introduction to the Build a String Repeating Function
+
+In this lab, you will implement loops to repeat a string a specified number of times.

curriculum/challenges/_meta/lab-repeat-a-string/meta.json

@@ -0,0 +1,11 @@
+{
+  "name": "Build a String Repeating Function",
+  "isUpcomingChange": false,
+  "dashedName": "lab-repeat-a-string",
+  "superBlock": "full-stack-developer",
+  "helpCategory": "JavaScript",
+  "challengeOrder": [{ "id": "afcc8d540bea9ea2669306b6", "title": "Build a String Repeating Function" }],
+  "usesMultifileEditor": true,
+  "blockType": "lab",
+  "blockLayout": "link"
+}

curriculum/challenges/english/25-front-end-development/lab-repeat-a-string/afcc8d540bea9ea2669306b6.md

@@ -0,0 +1,105 @@
+---
+id: afcc8d540bea9ea2669306b6
+title: Build a String Repeating Function
+challengeType: 26
+dashedName: build-a-string-repeating-function
+---
+
+# --description--
+
+In this lab, you will create a function that repeats a given string a specific number of times. For the purpose of this lab, do _not_ use the built-in `.repeat()` method.
+
+**Objective:** Fulfill the user stories below and get all the tests to pass to complete the lab.
+
+**User Stories:**
+
+1. You should create a function named `repeatStringNumTimes` that takes two parameters: a string and a number.
+2. The function should return the string repeated the specified number of times.
+3. If the number is less than or equal to zero, the function should return an empty string.
+
+# --hints--
+
+You should create a function named `repeatStringNumTimes`.
+
+```js
+assert.isFunction(repeatStringNumTimes);
+```
+
+`repeatStringNumTimes` should take two parameters.
+
+```js
+assert.lengthOf(repeatStringNumTimes, 2);
+```
+
+The function `repeatStringNumTimes` should always return a string.
+
+```js
+assert.isString(repeatStringNumTimes('hello', 3));
+```
+
+`repeatStringNumTimes("*", 3)` should return the string `***`.
+
+```js
+assert.strictEqual(repeatStringNumTimes('*', 3), '***');
+```
+
+`repeatStringNumTimes("abc", 3)` should return the string `abcabcabc`.
+
+```js
+assert.strictEqual(repeatStringNumTimes('abc', 3), 'abcabcabc');
+```
+
+`repeatStringNumTimes("abc", 4)` should return the string `abcabcabcabc`.
+
+```js
+assert.strictEqual(repeatStringNumTimes('abc', 4), 'abcabcabcabc');
+```
+
+`repeatStringNumTimes("abc", 1)` should return the string `abc`.
+
+```js
+assert.strictEqual(repeatStringNumTimes('abc', 1), 'abc');
+```
+
+`repeatStringNumTimes("*", 8)` should return the string `********`.
+
+```js
+assert.strictEqual(repeatStringNumTimes('*', 8), '********');
+```
+
+`repeatStringNumTimes("abc", -2)` should return an empty string (`""`).
+
+```js
+assert.isEmpty(repeatStringNumTimes('abc', -2));
+```
+
+`repeatStringNumTimes("abc", 0)` should return `""`.
+
+```js
+assert.isEmpty(repeatStringNumTimes('abc', 0));
+```
+
+The built-in `repeat()` method should not be used.
+
+```js
+assert.notMatch(__helpers.removeJSComments(code), /\.repeat/g);
+```
+
+# --seed--
+
+## --seed-contents--
+
+```js
+
+```
+
+# --solutions--
+
+```js
+function repeatStringNumTimes(str, num) {
+  if (num < 1) return '';
+  return num === 1 ? str : str + repeatStringNumTimes(str, num - 1);
+}
+
+repeatStringNumTimes('abc', 3);
+```

curriculum/superblock-structure/full-stack.json

@@ -704,6 +704,7 @@
             },
             { "dashedName": "lab-mutations" },
             { "dashedName": "lab-chunky-monkey" },
+            { "dashedName": "lab-repeat-a-string" },
             {
               "dashedName": "lab-profile-lookup"
             },