feat(client, learn): add helper functions for common validation operations (#38605)

Co-authored-by: Randell Dawson <5313213+RandellDawson@users.noreply.github.com>

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/access-multi-dimensional-arrays-with-indexes.english.md

@@ -39,7 +39,7 @@ tests:
   - text: <code>myData</code> should be equal to <code>8</code>.
     testString: assert(myData === 8);
   - text: You should be using bracket notation to read the correct value from <code>myArray</code>.
-    testString: assert(/myData=myArray\[2\]\[1\]/.test(code.replace(/\s/g, '')));
+    testString: assert(/myData=myArray\[2\]\[1\]/.test(__helpers.removeWhiteSpace(code)));
 
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/iterate-through-an-array-with-a-for-loop.english.md

@@ -37,7 +37,7 @@ tests:
   - text: You should use a <code>for</code> loop to iterate through <code>myArr</code>.
     testString: assert(/for\s*\(/g.test(code) && /myArr\s*\[/g.test(code));
   - text: You should not attempt to directly assign the value 20 to <code>total</code>.
-    testString: assert(!code.replace(/\s/g, '').match(/total[=+-]0*[1-9]+/gm));
+    testString: assert(!__helpers.removeWhiteSpace(code).match(/total[=+-]0*[1-9]+/gm));
 ```
 
 </section>

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/local-scope-and-functions.english.md

@@ -43,7 +43,7 @@ tests:
       }
       assert.throws(declared, ReferenceError);
   - text: You should add a local <code>myVar</code> variable.
-    testString: assert(/functionmyLocalScope\(\)\{.+(var|let|const)myVar[\s\S]*}/.test(code.replace(/\s/g, '')));
+    testString: assert(/functionmyLocalScope\(\)\{.+(var|let|const)myVar[\s\S]*}/.test(__helpers.removeWhiteSpace(code)));
 
 
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/replace-loops-using-recursion.english.md

@@ -57,9 +57,9 @@ tests:
   - text: <code>sum([2, 3, 4, 5], 3)</code> should equal 9.
     testString: assert.equal(sum([2, 3, 4, 5], 3), 9);
   - text: Your code should not rely on any kind of loops (<code>for</code> or <code>while</code> or higher order functions such as <code>forEach</code>, <code>map</code>, <code>filter</code>, or <code>reduce</code>.).
-    testString: assert(!removeJSComments(code).match(/for|while|forEach|map|filter|reduce/g));
+    testString: assert(!__helpers.removeJSComments(code).match(/for|while|forEach|map|filter|reduce/g));
   - text: You should use recursion to solve this problem.
-    testString: assert(removeJSComments(sum.toString()).match(/sum\(.*\)/g).length > 1);
+    testString: assert(__helpers.removeJSComments(sum.toString()).match(/sum\(.*\)/g).length > 1);
 ```
 
 </section>
@@ -80,16 +80,6 @@ function sum(arr, n) {
 
 </div>
 
-### After Test
-<div id='js-teardown'>
-
-```js
-const removeJSComments = str => str.replace(/\/\*[\s\S]*?\*\/|\/\/.*$/gm, '');
-
-```
-
-</div>
-
 </section>
 
 ## Solution

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/subtract-one-number-from-another-with-javascript.english.md

@@ -33,7 +33,7 @@ tests:
   - text: The variable <code>difference</code> should be equal to 12.
     testString: assert(difference === 12);
   - text: You should only subtract one number from 45.
-    testString: assert(/difference=45-33;?/.test(code.replace(/\s/g, '')));
+    testString: assert(/difference=45-33;?/.test(__helpers.removeWhiteSpace(code)));
 ```
 
 </section>

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/understanding-undefined-value-returned-from-a-function.english.md

@@ -39,7 +39,7 @@ tests:
   - text: Returned value from <code>addFive</code> should be <code>undefined</code>.
     testString: assert(addFive() === undefined);
   - text: Inside the <code>addFive</code> function, you should add <code>5</code> to the <code>sum</code> variable.
-    testString: assert(addFive.toString().replace(/\s/g, '').match(/sum=sum\+5|sum\+=5/));
+    testString: assert(__helpers.removeWhiteSpace(addFive.toString()).match(/sum=sum\+5|sum\+=5/));
 
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-recursion-to-create-a-countdown.english.md

@@ -52,9 +52,9 @@ tests:
   - text: <code>countdown(5)</code> should return <code>[5, 4, 3, 2, 1]</code>
     testString: assert.deepStrictEqual(countdown(5), [5, 4, 3, 2, 1]);
   - text: Your code should not rely on any kind of loops (<code>for</code>, <code>while</code> or higher order functions such as <code>forEach</code>, <code>map</code>, <code>filter</code>, and <code>reduce</code>).
-    testString: assert(!removeJSComments(code).match(/for|while|forEach|map|filter|reduce/g));
+    testString: assert(!__helpers.removeJSComments(code).match(/for|while|forEach|map|filter|reduce/g));
   - text: You should use recursion to solve this problem.
-    testString: assert(removeJSComments(countdown.toString()).match(/countdown\s*\(.+\)/));
+    testString: assert(__helpers.removeJSComments(countdown.toString()).match(/countdown\s*\(.+\)/));
 ```
 
 </section>
@@ -76,15 +76,6 @@ function countdown(n){
 
 </div>
 
-### After Test
-<div id='js-teardown'>
-
-```js
-const removeJSComments = str => str.replace(/\/\*[\s\S]*?\*\/|\/\/.*$/gm, '');
-```
-
-</div>
-
 </section>
 
 ## Solution

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-recursion-to-create-a-range-of-numbers.english.md

@@ -25,9 +25,9 @@ tests:
   - text: Your function should return an array.
     testString: assert(Array.isArray(rangeOfNumbers(5, 10)));
   - text: Your code should not use any loop syntax (<code>for</code> or <code>while</code> or higher order functions such as <code>forEach</code>, <code>map</code>, <code>filter</code>, or <code>reduce</code>).
-    testString: assert(!removeJSComments(code).match(/for|while|forEach|map|filter|reduce/g));
+    testString: assert(!__helpers.removeJSComments(code).match(/for|while|forEach|map|filter|reduce/g));
   - text: <code>rangeOfNumbers</code> should use recursion (call itself) to solve this challenge.
-    testString: assert(removeJSComments(rangeOfNumbers.toString()).match(/rangeOfNumbers\s*\(.+\)/));
+    testString: assert(__helpers.removeJSComments(rangeOfNumbers.toString()).match(/rangeOfNumbers\s*\(.+\)/));
   - text: <code>rangeOfNumbers(1, 5)</code> should return <code>[1, 2, 3, 4, 5]</code>.
     testString: assert.deepStrictEqual(rangeOfNumbers(1, 5), [1, 2, 3, 4, 5]);
   - text: <code>rangeOfNumbers(6, 9)</code> should return <code>[6, 7, 8, 9]</code>.
@@ -51,15 +51,6 @@ function rangeOfNumbers(startNum, endNum) {
 
 </div>
 
-### After Test
-<div id='js-teardown'>
-
-```js
-const removeJSComments = str => str.replace(/\/\*[\s\S]*?\*\/|\/\/.*$/gm, '');
-```
-
-</div>
-
 </section>
 
 ## Solution