Add missing expected results to exercises and fix typos

1-exercises/A-array-find/exercise.js

@@ -1,4 +1,4 @@
-/* 
+/*
   You are given an array of names.
   Using .find(), we'd like to find the first name which starts with A and is longer than 7 letters.
 */

1-exercises/D-array-filter/exercise.js

@@ -20,3 +20,8 @@ let pairs = pairsByIndex.map(function (indexes) {
 });
 
 console.log(pairs);
+
+/* EXPECTED RESULT
+
+  [ [ 'Islam', 'Luke' ], [ 'Lesley', 'Mozafar' ], [ 'Harun', 'Irina' ] ]
+*/

1-exercises/E-array-map/exercise.js

@@ -2,3 +2,12 @@
 // Write multiple solutions using different syntax (as shown in the README)
 
 let numbers = [0.1, 0.2, 0.3, 0.4, 0.5];
+
+let numbersMultipliedByOneHundred; // complete this statement
+
+console.log(numbersMultipliedByOneHundred);
+
+/* EXPECTED RESULT
+
+  [10, 20, 30, 40, 50]
+*/

2-mandatory/2-oxygen-levels.js

@@ -1,14 +1,14 @@
 /*
     Many years into the future, a team of Space Voyagers find their ship is low on Oxygen and need to dock
     somewhere safe while they call home for help.
-  
+
     Their computer detects a list of nearby planets that have Oxygen in their atmosphere.
 
     To be safe, they need to land on the first unnamed planet that has Oxygen levels between 19.5% and 23.5%.
 
     Write a function that finds the oxygen level of the first safe planet - Oxygen between 19.5% and 23.5%
 
-    Some string methods that might help you here are .replace() and .substring(). 
+    Some string methods that might help you here are .replace() and .substring().
 */
 
 function findSafeOxygenLevel() {}
@@ -33,6 +33,6 @@ test("findSafeOxygenLevel function filters out invalid percentages", () => {
   ).toEqual("21.1%");
 });
 
-test("findSafeOxygenLevel function returns undefined if no valid plants found", () => {
+test("findSafeOxygenLevel function returns undefined if no valid planets found", () => {
   expect(findSafeOxygenLevel(["50"])).toBeUndefined();
 });

2-mandatory/6-journey-planner.js

@@ -1,17 +1,17 @@
 /*
- Before we go the big story; we will introduce more string methods.
- Some of the methods you're using in Array have similar ones with strings.
- Methods like : IndexOf, Include, Search, Slice , Spilt and more.
- 
- You can always google how a method of a string works!
+ Before we go to the big story, we will introduce some more string methods.
+ Some of the methods you're using on arrays are similar to ones you can use on strings.
+ Methods like: IndexOf, Include, Search, Slice , Spilt and more.
+
+ You can always Google how a method of a string works!
  Here are links to some of those:
   - https://www.w3schools.com/js/js_string_methods.asp
   - https://javascript.info/string#quotes
  Now let's do this small exercise
- 
+
  Using string methods update the checkCodeIsThere() function
   - The function will have a string as a paramter
-  - The function should check if the string has the word "code" exists in the string
+  - The function should check if the word "code" exists in the string
   - If it does exist, return the index of it, if not return "Not found"
 
  Hint: search for string methods like Includes and IndexOf.
@@ -32,27 +32,27 @@ function checkCodeIsThere(stringText) {
   The input provided contains a list of locations in London. Each of locations is followed by a list
   of transport modes that can be used to get there.
   Let's see an example:
-  
-  To take to Tower Bridge, you can use tube or river boat. This information will represented as 
+
+  To take to Tower Bridge, you can use tube or river boat. This information will represented as
     ["Tower Bridge", "tube", "river boat"]
 
   Where
     the 1st element says the name of the location,
-    and rest of them says the transport modes.
+    and rest of them say the transport modes.
 
-  You will then get a list of these information, e.g:
+  You will then get a list of this information, e.g:
   [
     ["Tower Bridge", "tube", "river boat"],
     ["Abbey road", "double decker"],
     ["London Eye", "tube", "river boat", "bus"]
   ]
 
-  You have to finish up the body of journeyPlanner function that should tell where I can go if I only
+  You have to finish up the body of journeyPlanner function that should tell me where I can go if I only
   want to use a specific mode of transport. But before jumping straight to the main function, we will
   break down the whole task into smaller steps that make our job easier.
 
-  This technic is also referred as "problem decomposition". It helps you to reduce scope of the problem 
-  by only focusing on a small chunk of the whole problem at a time.)
+  This technique is also referred to as "problem decomposition". It helps you to reduce the scope of the problem
+  by only focusing on a small chunk of the whole problem at a time.
 */
 
 /*
@@ -61,7 +61,7 @@ function checkCodeIsThere(stringText) {
      e.g: ["Tower Bridge", "tube", "river boat"]
    - Returns an array including the available transport modes to the given location
      e.g: ["tube", "river boat"]
-  
+
   Hint: Use the corresponding array method to split the array.
 */
 function getTransportModes() {}
@@ -74,12 +74,12 @@ function getTransportModes() {}
         e.g: ["tube", "river boat"]
      2) Second parameter is a string containing a transport mode
         e.g: "river boat"
-     
-   - Returns 
+
+   - Returns
      * True if the location in the first parameter is accessible by the transport mode given in second parameter
      * Otherwise, returns false
-    
-  Hint: Use the corresponding array method to decide if an element is member of an array.
+
+  Hint: Use the corresponding array method to decide if an element is included in an array.
 */
 function isAccessibleByTransportMode() {}
 
@@ -113,12 +113,12 @@ function getLocationName() {}
   - Returns an array of where I can go if I only want to use a specific mode of transport.
 
   NOTE: only the location names should be returned, not the name of transports.
-  
+
   HINTS:
    - Use the function you implemented above.
-   - Use array method to remove locations that is not accessible by the given transportMode.
+   - Use array method to remove locations that are not accessible by the given transportMode.
    - Use array method to manipulate its elements.
-   
+
   Advanced challange: try to use arrow function when invoking an array method.
 */
 function journeyPlanner(locations, transportMode) {