fix(curriculum): Consolidated comments for JavaScript Algorithms and Data Structures challenges - part 1 of 4 (#38258)

* fix: consolidate/remove comments

* fix: remove => from comment

* fix: reverted changes to add same changes to another PR

* fix: removed 'the' from sentence

Co-Authored-By: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

* fix: removed 'the' from the sentence

Co-Authored-By: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/boo-who.english.md

@@ -54,7 +54,6 @@ tests:
 
 ```js
 function booWho(bool) {
-  // What is the new fad diet for ghost developers? The Boolean.
   return bool;
 }
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/chunky-monkey.english.md

@@ -47,7 +47,6 @@ tests:
 
 ```js
 function chunkArrayInGroups(arr, size) {
-  // Break it up.
   return arr;
 }
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/confirm-the-ending.english.md

@@ -56,8 +56,6 @@ tests:
 
 ```js
 function confirmEnding(str, target) {
-  // "Never give up and good luck will find you."
-  // -- Falcor
   return str;
 }
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/falsy-bouncer.english.md

@@ -42,7 +42,6 @@ tests:
 
 ```js
 function bouncer(arr) {
-  // Don't show a false ID to this bouncer.
   return arr;
 }
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/repeat-a-string-repeat-a-string.english.md

@@ -49,7 +49,6 @@ tests:
 
 ```js
 function repeatStringNumTimes(str, num) {
-  // repeat after me
   return str;
 }
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/return-largest-numbers-in-arrays.english.md

@@ -42,7 +42,6 @@ tests:
 
 ```js
 function largestOfFour(arr) {
-  // You can do this!
   return arr;
 }
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/slice-and-splice.english.md

@@ -49,7 +49,6 @@ tests:
 
 ```js
 function frankenSplice(arr1, arr2, n) {
-  // It's alive. It's alive!
   return arr2;
 }
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/truncate-a-string.english.md

@@ -45,7 +45,6 @@ tests:
 
 ```js
 function truncateString(str, num) {
-  // Clear out that junk in your trunk
   return str;
 }
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-algorithm-scripting/where-do-i-belong.english.md

@@ -67,7 +67,6 @@ tests:
 
 ```js
 function getIndexToIns(arr, num) {
-  // Find my place in this sorted array.
   return num;
 }
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/iterate-through-all-an-arrays-items-using-for-loops.english.md

@@ -61,13 +61,12 @@ tests:
 ```js
 function filteredArray(arr, elem) {
   let newArr = [];
-  // change code below this line
+  // Only change code below this line
 
-  // change code above this line
+  // Only change code above this line
   return newArr;
 }
 
-// change code here to test different cases:
 console.log(filteredArray([[3, 2, 3], [1, 6, 3], [3, 13, 26], [19, 3, 9]], 3));
 ```
 
@@ -83,13 +82,11 @@ console.log(filteredArray([[3, 2, 3], [1, 6, 3], [3, 13, 26], [19, 3, 9]], 3));
 ```js
 function filteredArray(arr, elem) {
   let newArr = [];
-  // change code below this line
   for (let i = 0; i<arr.length; i++) {
     if (arr[i].indexOf(elem) < 0) {
       newArr.push(arr[i]);
     }
   }
-  // change code above this line
   return newArr;
 }
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/iterate-through-the-keys-of-an-object-with-a-for...in-statement.english.md

@@ -72,9 +72,9 @@ tests:
 
 ```js
 function countOnline(usersObj) {
-  // change code below this line
+  // Only change code below this line
 
-  // change code above this line
+  // Only change code above this line
 }
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/modify-an-array-stored-in-an-object.english.md

@@ -58,9 +58,9 @@ let user = {
 };
 
 function addFriend(userObj, friend) {
-  // change code below this line
+  // Only change code below this line
 
-  // change code above this line
+  // Only change code above this line
 }
 
 console.log(addFriend(user, 'Pete'));

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/modify-an-object-nested-within-an-object.english.md

@@ -65,9 +65,9 @@ let userActivity = {
   }
 };
 
-// change code below this line
+// Only change code below this line
 
-// change code above this line
+// Only change code above this line
 
 console.log(userActivity);
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-data-structures/use-the-delete-keyword-to-remove-object-properties.english.md

@@ -51,9 +51,9 @@ let foods = {
   strawberries: 27
 };
 
-// change code below this line
+// Only change code below this line
 
-// change code above this line
+// Only change code above this line
 
 console.log(foods);
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/accessing-object-properties-with-variables.english.md

@@ -79,8 +79,8 @@ var testObj = {
 
 // Only change code below this line
 
-var playerNumber;       // Change this Line
+var playerNumber;       // Change this line
-var player = testObj;   // Change this Line
+var player = testObj;   // Change this line
 ```
 
 </div>

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/adding-a-default-option-in-switch-statements.english.md

@@ -75,7 +75,6 @@ function switchOfStuff(val) {
   return answer;
 }
 
-// Change this value to test
 switchOfStuff(1);
 
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/chaining-if-else-statements.english.md

@@ -81,7 +81,6 @@ function testSize(num) {
   // Only change code above this line
 }
 
-// Change this value to test
 testSize(7);
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-equality-operator.english.md

@@ -69,7 +69,6 @@ function testEqual(val) {
   return "Not Equal";
 }
 
-// Change this value to test
 testEqual(10);
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-greater-than-or-equal-to-operator.english.md

@@ -70,7 +70,6 @@ function testGreaterOrEqual(val) {
   return "Less than 10";
 }
 
-// Change this value to test
 testGreaterOrEqual(10);
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-inequality-operator.english.md

@@ -62,7 +62,6 @@ function testNotEqual(val) {
   return "Equal";
 }
 
-// Change this value to test
 testNotEqual(10);
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-less-than-operator.english.md

@@ -68,7 +68,6 @@ function testLessThan(val) {
   return "55 or Over";
 }
 
-// Change this value to test
 testLessThan(10);
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-less-than-or-equal-to-operator.english.md

@@ -70,7 +70,6 @@ function testLessOrEqual(val) {
   return "More Than 24";
 }
 
-// Change this value to test
 testLessOrEqual(10);
 
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-strict-equality-operator.english.md

@@ -57,7 +57,6 @@ function testStrict(val) {
   return "Not Equal";
 }
 
-// Change this value to test
 testStrict(10);
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-strict-inequality-operator.english.md

@@ -58,7 +58,6 @@ function testStrictNotEqual(val) {
   return "Equal";
 }
 
-// Change this value to test
 testStrictNotEqual(10);
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparisons-with-the-logical-and-operator.english.md

@@ -85,7 +85,6 @@ function testLogicalAnd(val) {
   return "No";
 }
 
-// Change this value to test
 testLogicalAnd(10);
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/comparisons-with-the-logical-or-operator.english.md

@@ -89,7 +89,6 @@ function testLogicalOr(val) {
   return "Inside";
 }
 
-// Change this value to test
 testLogicalOr(15);
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/counting-cards.english.md

@@ -61,8 +61,6 @@ function cc(card) {
   // Only change code above this line
 }
 
-// Add/remove calls to test your function.
-// Note: Only the last will display
 cc(2); cc(3); cc(7); cc('K'); cc('A');
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/generate-random-whole-numbers-within-a-range.english.md

@@ -59,7 +59,6 @@ function randomRange(myMin, myMax) {
 
 }
 
-// Change these values to test your function
 var myRandom = randomRange(5, 15);
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/golf-code.english.md

@@ -66,7 +66,6 @@ function golfScore(par, strokes) {
   // Only change code above this line
 }
 
-// Change these values to test
 golfScore(5, 4);
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/introducing-else-if-statements.english.md

@@ -71,7 +71,6 @@ function testElseIf(val) {
   return "Between 5 and 10";
 }
 
-// Change this value to test
 testElseIf(7);
 
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/introducing-else-statements.english.md

@@ -71,7 +71,6 @@ function testElse(val) {
   return result;
 }
 
-// Change this value to test
 testElse(4);
 
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/logical-order-in-if-else-statements.english.md

@@ -85,7 +85,6 @@ function orderMyLogic(val) {
   }
 }
 
-// Change this value to test
 orderMyLogic(7);
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/manipulating-complex-objects.english.md

@@ -99,7 +99,7 @@ var myMusic = [
     ],
     "gold": true
   }
-  // Add record here
+  // Add a record here
 ];
 
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/multiple-identical-options-in-switch-statements.english.md

@@ -79,7 +79,6 @@ function sequentialSizes(val) {
   return answer;
 }
 
-// Change this value to test
 sequentialSizes(1);
 
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/practice-comparing-different-values.english.md

@@ -61,7 +61,6 @@ function compareEquality(a, b) {
   return "Not Equal";
 }
 
-// Change this value to test
 compareEquality(10, "10");
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/profile-lookup.english.md

@@ -84,7 +84,6 @@ function lookUpProfile(name, prop){
 // Only change code above this line
 }
 
-// Change these values to test your function
 lookUpProfile("Akira", "likes");
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/record-collection.english.md

@@ -91,9 +91,7 @@ function updateRecords(id, prop, value) {
   return collection;
 }
 
-// Alter values below to test your code
 updateRecords(5439, "artist", "ABBA");
-
 ```
 
 </div>

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/replacing-if-else-chains-with-switch.english.md

@@ -98,7 +98,6 @@ function chainToSwitch(val) {
   return answer;
 }
 
-// Change this value to test
 chainToSwitch(7);
 
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/returning-boolean-values-from-functions.english.md

@@ -68,7 +68,6 @@ function isLess(a, b) {
   // Only change code above this line
 }
 
-// Change these values to test
 isLess(10, 15);
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/selecting-from-many-options-with-switch-statements.english.md

@@ -68,7 +68,6 @@ function caseInSwitch(val) {
   return answer;
 }
 
-// Change this value to test
 caseInSwitch(1);
 
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/use-conditional-logic-with-if-statements.english.md

@@ -78,7 +78,6 @@ function trueOrFalse(wasThatTrue) {
 
 }
 
-// Change this value to test
 trueOrFalse(true);
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/basic-javascript/using-objects-for-lookups.english.md

@@ -99,7 +99,6 @@ function phoneticLookup(val) {
   return result;
 }
 
-// Change this value to test
 phoneticLookup("charlie");
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/create-a-module-script.english.md

@@ -43,9 +43,9 @@ tests:
 ```html
 <html>
   <body>
-    <!-- add your code below -->
+    <!-- Only change code below this line -->
 
-    <!-- add your code above -->
+    <!-- Only change code above this line -->
   </body>
 </html>
 ```
@@ -59,9 +59,7 @@ tests:
 ```html
 <html>
   <body>
-    <!-- add your code below -->
     <script type="module" src="index.js"></script>
-    <!-- add your code above -->
   </body>
 </html>
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/create-strings-using-template-literals.english.md

@@ -37,7 +37,16 @@ This new way of creating strings gives you more flexibility to create robust str
 ## Instructions
 <section id='instructions'>
 Use template literal syntax with backticks to display each entry of the <code>result</code> object's <code>failure</code> array. Each entry should be wrapped inside an <code>li</code> element with the class attribute <code>text-warning</code>, and listed within the <code>resultDisplayArray</code>.
-Use an iterator method (any kind of loop) to get the desired output.
+Use an iterator method (any kind of loop) to get the desired output (shown below).
+
+```js
+[
+  '<li class="text-warning">no-var</li>',
+  '<li class="text-warning">var-on-top</li>',
+  '<li class="text-warning">linebreak</li>'
+]
+```
+
 </section>
 
 ## Tests
@@ -71,18 +80,13 @@ const result = {
 function makeList(arr) {
   "use strict";
 
-  // change code below this line
+  // Only change code below this line
   const resultDisplayArray = null;
-  // change code above this line
+  // Only change code above this line
 
   return resultDisplayArray;
 }
-/**
+
- * makeList(result.failure) should return:
- * [ `<li class="text-warning">no-var</li>`,
- *   `<li class="text-warning">var-on-top</li>`,
- *   `<li class="text-warning">linebreak</li>` ]
- **/
 const resultDisplayArray = makeList(result.failure);
 ```
 
@@ -108,12 +112,7 @@ function makeList(arr) {
   
   return resultDisplayArray;
 }
-/**
+
- * makeList(result.failure) should return:
- * [ `<li class="text-warning">no-var</li>`,
- *   `<li class="text-warning">var-on-top</li>`,
- *   `<li class="text-warning">linebreak</li>` ]
- **/
 const resultDisplayArray = makeList(result.failure);
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/declare-a-read-only-variable-with-the-const-keyword.english.md

@@ -53,14 +53,14 @@ tests:
 function printManyTimes(str) {
   "use strict";
 
-  // change code below this line
+  // Only change code below this line
 
   var sentence = str + " is cool!";
   for (var i = 0; i < str.length; i+=2) {
     console.log(sentence);
   }
 
-  // change code above this line
+  // Only change code above this line
 
 }
 printManyTimes("freeCodeCamp");
@@ -79,15 +79,11 @@ printManyTimes("freeCodeCamp");
 function printManyTimes(str) {
   "use strict";
 
-  // change code below this line
-
   const SENTENCE = str + " is cool!";
   for (let i = 0; i < str.length; i+=2) {
     console.log(SENTENCE);
   }
 
-  // change code above this line
-
 }
 printManyTimes("freeCodeCamp");
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/mutate-an-array-declared-with-const.english.md

@@ -54,11 +54,11 @@ tests:
 const s = [5, 7, 2];
 function editInPlace() {
   'use strict';
-  // change code below this line
+  // Only change code below this line
 
   // s = [2, 5, 7]; <- this is invalid
 
-  // change code above this line
+  // Only change code above this line
 }
 editInPlace();
 ```
@@ -76,13 +76,9 @@ editInPlace();
 const s = [5, 7, 2];
 function editInPlace() {
   'use strict';
-  // change code below this line
-
-  // s = [2, 5, 7]; <- this is invalid
   s[0] = 2;
   s[1] = 5;
   s[2] = 7;
-  // change code above this line
 }
 editInPlace();
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/prevent-object-mutation.english.md

@@ -58,10 +58,10 @@ function freezeObj() {
   const MATH_CONSTANTS = {
     PI: 3.14
   };
-  // change code below this line
+  // Only change code below this line
 
 
-  // change code above this line
+  // Only change code above this line
   try {
     MATH_CONSTANTS.PI = 99;
   } catch(ex) {
@@ -87,10 +87,8 @@ function freezeObj() {
   const MATH_CONSTANTS = {
     PI: 3.14
   };
-  // change code below this line
   Object.freeze(MATH_CONSTANTS);
 
-  // change code above this line
   try {
     MATH_CONSTANTS.PI = 99;
   } catch(ex) {

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-class-syntax-to-define-a-constructor-function.english.md

@@ -65,12 +65,12 @@ tests:
 <div id='js-seed'>
 
 ```js
-/* Alter code below this line */
+// Only change code below this line
 
-/* Alter code above this line */
+// Only change code above this line
 
 const carrot = new Vegetable('carrot');
-console.log(carrot.name); // => should be 'carrot'
+console.log(carrot.name); // Should display 'carrot'
 ```
 
 </div>

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-arrays.english.md

@@ -54,9 +54,9 @@ tests:
 
 ```js
 let a = 8, b = 6;
-// change code below this line
+// Only change code below this line
 
-// change code above this line
+// Only change code above this line
 console.log(a); // should be 6
 console.log(b); // should be 8
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-nested-objects.english.md

@@ -65,12 +65,12 @@ const LOCAL_FORECAST = {
   tomorrow: { low: 68, high: 80 }
 };
 
-// change code below this line
+// Only change code below this line
   
 const lowToday = LOCAL_FORECAST.today.low;
 const highToday = LOCAL_FORECAST.today.high;
 
-// change code above this line
+// Only change code above this line
 
 console.log(lowToday); // should be 64
 console.log(highToday); // should be 77
@@ -89,12 +89,8 @@ const LOCAL_FORECAST = {
   tomorrow: { low: 68, high: 80 }
 };
 
-// change code below this line
-  
 const { today: { low: lowToday, high: highToday }} = LOCAL_FORECAST;
 
-// change code above this line
-
 console.log(highToday); // should be 77
 console.log(highTomorrow); // should be 80
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-assign-variables-from-objects.english.md

@@ -56,12 +56,12 @@ const HIGH_TEMPERATURES = {
   tomorrow: 80
 };
 
-// change code below this line
+// Only change code below this line
   
 const highToday = HIGH_TEMPERATURES.today;
 const highTomorrow = HIGH_TEMPERATURES.tomorrow; 
 
-// change code above this line
+// Only change code above this line
 
 console.log(yesterday) // should be not defined
 console.log(highToday); // should be 77
@@ -81,12 +81,8 @@ const HIGH_TEMPERATURES = {
   tomorrow: 80
 };
 
-// change code below this line
-  
 const { today: highToday, tomorrow: highTomorrow } = HIGH_TEMPERATURES;
 
-// change code above this line
-
 console.log(highToday); // should be 77
 console.log(highTomorrow); // should be 80
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-extract-values-from-objects.english.md

@@ -61,12 +61,12 @@ const HIGH_TEMPERATURES = {
   tomorrow: 80
 };
 
-// change code below this line
+// Only change code below this line
 
 const today = HIGH_TEMPERATURES.today;
 const tomorrow = HIGH_TEMPERATURES.tomorrow;
 
-// change code above this line
+// Only change code above this line
 
 console.log(yesterday) // should be not defined
 console.log(today); // should be 77
@@ -86,12 +86,8 @@ const HIGH_TEMPERATURES = {
   tomorrow: 80
 };
 
-// change code below this line
-
 const { today, tomorrow } = HIGH_TEMPERATURES;
 
-// change code above this line
-
 console.log(yesterday) // should be not defined
 console.log(today); // should be 77
 console.log(tomorrow); // should be 80

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-destructuring-assignment-to-pass-an-object-as-a-functions-parameters.english.md

@@ -67,10 +67,10 @@ const stats = {
   average: 35.85
 };
 
-// use function argument destructuring
+// Use function argument destructuring
-// change code below this line
+// Only change code below this line
 const half = (stats) => (stats.max + stats.min) / 2.0; 
-// change code above this line
+// Only change code above this line
 
 console.log(stats); // should be object
 console.log(half(stats)); // should be 28.015

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-getters-and-setters-to-control-access-to-an-object.english.md

@@ -75,9 +75,9 @@ tests:
 <div id='js-seed'>
 
 ```js
-/* Alter code below this line */
+// Only change code below this line
 
-/* Alter code above this line */
+// Only change code above this line
 
 const thermos = new Thermostat(76); // setting in Fahrenheit scale
 let temp = thermos.temperature; // 24.44 in C
@@ -95,8 +95,6 @@ temp = thermos.temperature; // 26 in C
 <section id='solution'>
 
 ```js
-
-/* Alter code below this line */
 class Thermostat {
   constructor(fahrenheit) {
     this._tempInCelsius = 5/9 * (fahrenheit - 32);
@@ -108,7 +106,6 @@ class Thermostat {
     this._tempInCelsius = newTemp;
   }
 }
-/* Alter code above this line */
 
 const thermos = new Thermostat(76); // setting in Fahrenheit scale
 let temp = thermos.temperature; // 24.44 in C

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/write-concise-declarative-functions-with-es6.english.md

@@ -58,14 +58,14 @@ tests:
 <div id='js-seed'>
 
 ```js
-// change code below this line
+// Only change code below this line
 const bicycle = {
   gear: 2,
   setGear: function(newGear) {
     this.gear = newGear;
   }
 };
-// change code above this line
+// Only change code above this line
 bicycle.setGear(3);
 console.log(bicycle.gear);
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/write-concise-object-literal-declarations-using-object-property-shorthand.english.md

@@ -54,13 +54,13 @@ tests:
 ```js
 const createPerson = (name, age, gender) => {
   "use strict";
-  // change code below this line
+  // Only change code below this line
   return {
     name: name,
     age: age,
     gender: gender
   };
-  // change code above this line
+  // Only change code above this line
 };
 console.log(createPerson("Zodiac Hasbro", 56, "male")); // returns a proper object
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/learn-about-functional-programming.english.md

@@ -41,17 +41,14 @@ tests:
 <div id='js-seed'>
 
 ```js
-/**
+// Function that returns a string representing a cup of green tea
- * A long process to prepare tea.
- * @return {string} A cup of tea.
- **/
 const prepareTea = () => 'greenTea';
 
-/**
+/*
- * Get given number of cups of tea.
+Given a function (representing the tea type) and number of cups needed, the
- * @param {number} numOfCups Number of required cups of tea.
+following function returns an array of strings (each representing a cup of
- * @return {Array<string>} Given amount of tea cups.
+a specific type of tea).
- **/
+*/
 const getTea = (numOfCups) => {
   const teaCups = [];
 
@@ -59,15 +56,12 @@ const getTea = (numOfCups) => {
     const teaCup = prepareTea();
     teaCups.push(teaCup);
   }
-
   return teaCups;
 };
 
-// Add your code below this line
+// Only change code below this line
-
+const tea4TeamFCC = null;
-const tea4TeamFCC = null; // :(
+// Only change code above this line
-
-// Add your code above this line
 
 console.log(tea4TeamFCC);
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/refactor-global-variables-out-of-functions.english.md

@@ -15,7 +15,10 @@ Adding one to a number is not very exciting, but we can apply these principles w
 
 ## Instructions
 <section id='instructions'>
-Rewrite the code so the global array <code>bookList</code> is not changed inside either function. The <code>add</code> function should add the given <code>bookName</code> to the end of an array. The <code>remove</code> function should remove the given <code>bookName</code> from an array. Both functions should return an array, and any new parameters should be added before the <code>bookName</code> parameter.
+Rewrite the code so the global array <code>bookList</code> is not changed inside either function. The <code>add</code> function should add the given <code>bookName</code> to the end of the array passed to it and return a new array (list). The <code>remove</code> function should remove the given <code>bookName</code> from the array passed to it.
+
+<strong>Note:</strong> Both functions should return an array, and any new parameters should be added before the <code>bookName</code> parameter.
+
 </section>
 
 ## Tests
@@ -45,22 +48,16 @@ tests:
 // the global variable
 var bookList = ["The Hound of the Baskervilles", "On The Electrodynamics of Moving Bodies", "Philosophiæ Naturalis Principia Mathematica", "Disquisitiones Arithmeticae"];
 
-/* This function should add a book to the list and return the list */
+// Change code below this line
-// New parameters should come before bookName
-
-// Add your code below this line
 function add (bookName) {
 
   bookList.push(bookName);
   return bookList;
   
-  // Add your code above this line
+  // Change code above this line
 }
 
-/* This function should remove a book from the list and return the list */
+// Change code below this line
-// New parameters should come before the bookName one
-
-// Add your code below this line
 function remove (bookName) {
   var book_index = bookList.indexOf(bookName);
   if (book_index >= 0) {
@@ -68,7 +65,7 @@ function remove (bookName) {
     bookList.splice(book_index, 1);
     return bookList;
 
-    // Add your code above this line
+    // Change code above this line
     }
 }
 
@@ -89,22 +86,13 @@ console.log(bookList);
 <section id='solution'>
 
 ```js
-// the global variable
+// The global variable
 var bookList = ["The Hound of the Baskervilles", "On The Electrodynamics of Moving Bodies", "Philosophiæ Naturalis Principia Mathematica", "Disquisitiones Arithmeticae"];
 
-/* This function should add a book to the list and return the list */
-// New parameters should come before the bookName one
-
-// Add your code below this line
 function add (bookList, bookName) {
   return [...bookList, bookName];
-  // Add your code above this line
 }
 
-/* This function should remove a book from the list and return the list */
-// New parameters should come before the bookName one
-
-// Add your code below this line
 function remove (bookList, bookName) {
   const bookListCopy = [...bookList];
   const bookNameIndex = bookList.indexOf(bookName);
@@ -112,7 +100,6 @@ function remove (bookList, bookName) {
     bookListCopy.splice(bookNameIndex, 1);
   }
   return bookListCopy;
-  // Add your code above this line
 }
 
 var newBookList = add(bookList, 'A Brief History of Time');

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/understand-functional-programming-terminology.english.md

@@ -46,24 +46,17 @@ tests:
 <div id='js-seed'>
 
 ```js
-/**
+// Function that returns a string representing a cup of green tea
- * A long process to prepare green tea.
- * @return {string} A cup of green tea.
- **/
 const prepareGreenTea = () => 'greenTea';
 
-/**
+// Function that returns a string representing a cup of black tea
- * A long process to prepare black tea.
- * @return {string} A cup of black tea.
- **/
 const prepareBlackTea = () => 'blackTea';
 
-/**
+/*
- * Get given number of cups of tea.
+Given a function (representing the tea type) and number of cups needed, the
- * @param {function():string} prepareTea The type of tea preparing function.
+following function returns an array of strings (each representing a cup of
- * @param {number} numOfCups Number of required cups of tea.
+a specific type of tea).
- * @return {Array<string>} Given amount of tea cups.
+*/
- **/
 const getTea = (prepareTea, numOfCups) => {
   const teaCups = [];
 
@@ -71,16 +64,13 @@ const getTea = (prepareTea, numOfCups) => {
     const teaCup = prepareTea();
     teaCups.push(teaCup);
   }
-
   return teaCups;
 };
 
-// Add your code below this line
+// Only change code below this line
-
+const tea4GreenTeamFCC = null;
-const tea4GreenTeamFCC = null; // :(
+const tea4BlackTeamFCC = null;
-const tea4BlackTeamFCC = null; // :(
+// Only change code above this line
-
-// Add your code above this line
 
 console.log(
   tea4GreenTeamFCC,

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/functional-programming/understand-the-hazards-of-using-imperative-code.english.md

@@ -47,7 +47,7 @@ tests:
 ```js
 // tabs is an array of titles of each site open within the window
 var Window = function(tabs) {
-  this.tabs = tabs; // we keep a record of the array inside the object
+  this.tabs = tabs; // We keep a record of the array inside the object
 };
 
 // When you join two windows into one window
@@ -58,7 +58,7 @@ Window.prototype.join = function (otherWindow) {
 
 // When you open a new tab at the end
 Window.prototype.tabOpen = function (tab) {
-  this.tabs.push('new tab'); // let's open a new tab for now
+  this.tabs.push('new tab'); // Let's open a new tab for now
   return this;
 };
 
@@ -67,10 +67,10 @@ Window.prototype.tabClose = function (index) {
 
   // Only change code below this line
 
-  var tabsBeforeIndex = this.tabs.splice(0, index); // get the tabs before the tab
+  var tabsBeforeIndex = this.tabs.splice(0, index); // Get the tabs before the tab
-  var tabsAfterIndex = this.tabs.splice(index + 1); // get the tabs after the tab
+  var tabsAfterIndex = this.tabs.splice(index + 1); // Get the tabs after the tab
 
-  this.tabs = tabsBeforeIndex.concat(tabsAfterIndex); // join them together
+  this.tabs = tabsBeforeIndex.concat(tabsAfterIndex); // Join them together
 
   // Only change code above this line
 
@@ -80,13 +80,13 @@ Window.prototype.tabClose = function (index) {
 // Let's create three browser windows
 var workWindow = new Window(['GMail', 'Inbox', 'Work mail', 'Docs', 'freeCodeCamp']); // Your mailbox, drive, and other work sites
 var socialWindow = new Window(['FB', 'Gitter', 'Reddit', 'Twitter', 'Medium']); // Social sites
-var videoWindow = new Window(['Netflix', 'YouTube', 'Vimeo', 'Vine']); //  Entertainment sites
+var videoWindow = new Window(['Netflix', 'YouTube', 'Vimeo', 'Vine']); // Entertainment sites
 
 // Now perform the tab opening, closing, and other operations
 var finalTabs = socialWindow
-                    .tabOpen() // Open a new tab for cat memes
+  .tabOpen() // Open a new tab for cat memes
-                    .join(videoWindow.tabClose(2)) // Close third tab in video window, and join
+  .join(videoWindow.tabClose(2)) // Close third tab in video window, and join
-                    .join(workWindow.tabClose(1).tabOpen());
+  .join(workWindow.tabClose(1).tabOpen());
 console.log(finalTabs.tabs);
 ```
 
@@ -102,7 +102,7 @@ console.log(finalTabs.tabs);
 ```js
 // tabs is an array of titles of each site open within the window
 var Window = function(tabs) {
-  this.tabs = tabs; // we keep a record of the array inside the object
+  this.tabs = tabs; // We keep a record of the array inside the object
 };
 
 // When you join two windows into one window
@@ -113,16 +113,16 @@ Window.prototype.join = function (otherWindow) {
 
 // When you open a new tab at the end
 Window.prototype.tabOpen = function (tab) {
-  this.tabs.push('new tab'); // let's open a new tab for now
+  this.tabs.push('new tab'); // Let's open a new tab for now
   return this;
 };
 
 // When you close a tab
 Window.prototype.tabClose = function (index) {
-  var tabsBeforeIndex = this.tabs.slice(0, index); // get the tabs before the tab
+  var tabsBeforeIndex = this.tabs.slice(0, index); // Get the tabs before the tab
-  var tabsAfterIndex = this.tabs.slice(index + 1); // get the tabs after the tab
+  var tabsAfterIndex = this.tabs.slice(index + 1); // Get the tabs after the tab
 
-  this.tabs = tabsBeforeIndex.concat(tabsAfterIndex); // join them together
+  this.tabs = tabsBeforeIndex.concat(tabsAfterIndex); // Join them together
   return this;
  };
 
@@ -133,9 +133,9 @@ var videoWindow = new Window(['Netflix', 'YouTube', 'Vimeo', 'Vine']); //  Enter
 
 // Now perform the tab opening, closing, and other operations
 var finalTabs = socialWindow
-                    .tabOpen() // Open a new tab for cat memes
+  .tabOpen() // Open a new tab for cat memes
-                    .join(videoWindow.tabClose(2)) // Close third tab in video window, and join
+  .join(videoWindow.tabClose(2)) // Close third tab in video window, and join
-                    .join(workWindow.tabClose(1).tabOpen());
+  .join(workWindow.tabClose(1).tabOpen());
 ```
 
 </section>

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/convert-html-entities.english.md

@@ -47,7 +47,6 @@ tests:
 
 ```js
 function convertHTML(str) {
-  // :)
   return str;
 }
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/diff-two-arrays.english.md

@@ -65,7 +65,6 @@ tests:
 ```js
 function diffArray(arr1, arr2) {
   var newArr = [];
-  // Same, same; but different.
   return newArr;
 }
 
@@ -101,7 +100,6 @@ function diffArray(arr1, arr2) {
   Object.keys(h2).forEach(function(e) {
      if (!(e in h1)) newArr.push(h2[e]);
   });
-  // Same, same; but different.
   return newArr;
 }
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/drop-it.english.md

@@ -46,7 +46,6 @@ tests:
 
 ```js
 function dropElements(arr, func) {
-  // Drop them elements.
   return arr;
 }
 
@@ -65,7 +64,6 @@ dropElements([1, 2, 3], function(n) {return n < 3; });
 
 ```js
 function dropElements(arr, func) {
-  // Drop them elements.
   while (arr.length && !func(arr[0])) {
     arr.shift();
   }

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/everything-be-true.english.md

@@ -54,7 +54,6 @@ tests:
 
 ```js
 function truthCheck(collection, pre) {
-  // Is everyone being true?
   return pre;
 }
 
@@ -73,7 +72,6 @@ truthCheck([{"user": "Tinky-Winky", "sex": "male"}, {"user": "Dipsy", "sex": "ma
 
 ```js
 function truthCheck(collection, pre) {
-  // Does everyone have one of these?
   return collection.every(function(e) { return e[pre]; });
 }
 ```

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/seek-and-destroy.english.md

@@ -46,7 +46,6 @@ tests:
 
 ```js
 function destroyer(arr) {
-  // Remove all the values
   return arr;
 }
 
@@ -69,7 +68,6 @@ function destroyer(arr) {
   [].slice.call(arguments, 1).forEach(function(e) {
     hash[e] = true;
   });
-  // Remove all the values
   return arr.filter(function(e) { return !(e in hash);});
 }
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/spinal-tap-case.english.md

@@ -43,8 +43,6 @@ tests:
 
 ```js
 function spinalCase(str) {
-  // "It's such a fine line between stupid, and clever."
-  // --David St. Hubbins
   return str;
 }
 
@@ -63,8 +61,6 @@ spinalCase('This Is Spinal Tap');
 
 ```js
 function spinalCase(str) {
-  // "It's such a fine line between stupid, and clever."
-  // --David St. Hubbins
   str = str.replace(/([a-z](?=[A-Z]))/g, '$1 ');
   return str.toLowerCase().replace(/\ |\_/g, '-');
 }

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/steamroller.english.md

@@ -42,7 +42,6 @@ tests:
 
 ```js
 function steamrollArray(arr) {
-  // I'm a steamroller, baby
   return arr;
 }
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/intermediate-algorithm-scripting/wherefore-art-thou.english.md

@@ -46,7 +46,6 @@ tests:
 
 ```js
 function whatIsInAName(collection, source) {
-  // What's in a name?
   var arr = [];
   // Only change code below this line
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/caesars-cipher.english.md

@@ -43,12 +43,11 @@ tests:
 <div id='js-seed'>
 
 ```js
-function rot13(str) { // LBH QVQ VG!
+function rot13(str) {
 
   return str;
 }
 
-// Change the inputs below to test
 rot13("SERR PBQR PNZC");
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/cash-register.english.md

@@ -15,6 +15,23 @@ Return <code>{status: "INSUFFICIENT_FUNDS", change: []}</code> if cash-in-drawer
 Return <code>{status: "CLOSED", change: [...]}</code> with cash-in-drawer as the value for the key <code>change</code> if it is equal to the change due.
 Otherwise, return <code>{status: "OPEN", change: [...]}</code>, with the change due in coins and bills, sorted in highest to lowest order, as the value of the <code>change</code> key.
 <table class='table table-striped'><tr><th>Currency Unit</th><th>Amount</th></tr><tr><td>Penny</td><td>$0.01 (PENNY)</td></tr><tr><td>Nickel</td><td>$0.05 (NICKEL)</td></tr><tr><td>Dime</td><td>$0.1 (DIME)</td></tr><tr><td>Quarter</td><td>$0.25 (QUARTER)</td></tr><tr><td>Dollar</td><td>$1 (DOLLAR)</td></tr><tr><td>Five Dollars</td><td>$5 (FIVE)</td></tr><tr><td>Ten Dollars</td><td>$10 (TEN)</td></tr><tr><td>Twenty Dollars</td><td>$20 (TWENTY)</td></tr><tr><td>One-hundred Dollars</td><td>$100 (ONE HUNDRED)</td></tr></table>
+
+See below for an example of a cash-in-drawer array:
+
+```js
+[
+  ["PENNY", 1.01],
+  ["NICKEL", 2.05],
+  ["DIME", 3.1],
+  ["QUARTER", 4.25],
+  ["ONE", 90],
+  ["FIVE", 55],
+  ["TEN", 20],
+  ["TWENTY", 60],
+  ["ONE HUNDRED", 100]
+]
+```
+
 </section>
 
 ## Instructions
@@ -52,21 +69,9 @@ tests:
 ```js
 function checkCashRegister(price, cash, cid) {
   var change;
-  // Here is your change, ma'am.
   return change;
 }
 
-// Example cash-in-drawer array:
-// [["PENNY", 1.01],
-// ["NICKEL", 2.05],
-// ["DIME", 3.1],
-// ["QUARTER", 4.25],
-// ["ONE", 90],
-// ["FIVE", 55],
-// ["TEN", 20],
-// ["TWENTY", 60],
-// ["ONE HUNDRED", 100]]
-
 checkCashRegister(19.5, 20, [["PENNY", 1.01], ["NICKEL", 2.05], ["DIME", 3.1], ["QUARTER", 4.25], ["ONE", 90], ["FIVE", 55], ["TEN", 20], ["TWENTY", 60], ["ONE HUNDRED", 100]]);
 ```
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/palindrome-checker.english.md

@@ -63,7 +63,6 @@ tests:
 
 ```js
 function palindrome(str) {
-  // Good luck!
   return true;
 }
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/javascript-algorithms-and-data-structures-projects/telephone-number-validator.english.md

@@ -90,7 +90,6 @@ tests:
 
 ```js
 function telephoneCheck(str) {
-  // Good luck!
   return true;
 }
 

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/understand-the-prototype-chain.english.md

@@ -14,21 +14,20 @@ function Bird(name) {
   this.name = name;
 }
 
-typeof Bird.prototype; // => object
+typeof Bird.prototype; // yields 'object'
 ```
 
 Because a <code>prototype</code> is an object, a <code>prototype</code> can have its own <code>prototype</code>! In this case, the <code>prototype</code> of <code>Bird.prototype</code> is <code>Object.prototype</code>:
 
 ```js
-Object.prototype.isPrototypeOf(Bird.prototype);
+Object.prototype.isPrototypeOf(Bird.prototype); // returns true
-// returns true
 ```
 
 How is this useful? You may recall the <code>hasOwnProperty</code> method from a previous challenge:
 
 ```js
 let duck = new Bird("Donald");
-duck.hasOwnProperty("name"); // => true
+duck.hasOwnProperty("name"); // yields true
 ```
 
 The <code>hasOwnProperty</code> method is defined in <code>Object.prototype</code>, which can be accessed by <code>Bird.prototype</code>, which can then be accessed by <code>duck</code>. This is an example of the <code>prototype</code> chain.
@@ -65,7 +64,7 @@ function Dog(name) {
 
 let beagle = new Dog("Snoopy");
 
-Dog.prototype.isPrototypeOf(beagle);  // => true
+Dog.prototype.isPrototypeOf(beagle);  // yields true
 
 // Fix the code below so that it evaluates to true
 ???.isPrototypeOf(Dog.prototype);

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/object-oriented-programming/verify-an-objects-constructor-with-instanceof.english.md

@@ -60,8 +60,6 @@ tests:
 <div id='js-seed'>
 
 ```js
-/* jshint expr: true */
-
 function House(numBedrooms) {
   this.numBedrooms = numBedrooms;
 }