Zision week 9

week-2/Homework/extra/4-radio-stations.js → week-2/Homework/extra/1-radio-stations.js

@@ -26,7 +26,6 @@
  */
 // `getStations` goes here
 
-
 /* ======= TESTS - DO NOT MODIFY ======= */
 
 function getAvailableStations() {
@@ -36,10 +35,10 @@ function getAvailableStations() {
     const stationCount = 4;
     getAvailableStations.stations = new Array(stationCount)
       .fill(undefined)
-      .map(function() {
+      .map(function () {
         return Math.floor(Math.random() * (108 - 87 + 1) + 87);
       })
-      .sort(function(frequencyA, frequencyB) {
+      .sort(function (frequencyA, frequencyB) {
         return frequencyA - frequencyB;
       });
   }
@@ -64,7 +63,7 @@ function test(testName, fn) {
   }
 }
 
-test("getAllFrequencies() returns all frequencies between 87 and 108", function() {
+test("getAllFrequencies() returns all frequencies between 87 and 108", function () {
   const frequencies = getAllFrequencies();
   assert.deepStrictEqual(frequencies, [
     87,
@@ -88,7 +87,7 @@ test("getAllFrequencies() returns all frequencies between 87 and 108", function(
     105,
     106,
     107,
-    108
+    108,
   ]);
 });
 

week-2/Homework/extra/2-array-methods.js

@@ -0,0 +1,35 @@
+/*
+Following are set of small functions that you need to create using loops and array methods 
+
+*/
+//1)Find the Smallest Number in an Array
+//Create a function that takes an array of numbers and return the smallest number in it
+
+function findSmallestNum(arr) {}
+
+findSmallestNum([354, 15, 114, 2]); //Expected: 2
+
+findSmallestNum([-76, 1, -79, 1, 0]); //Expected: -79
+
+//2)Checking Even Numbers
+//Create a function that takes in an array and returns true if all its values are even, and false otherwise.
+function checkAllEven(arr) {}
+
+checkAllEven([1, 2, 2, 6, 9, 4]); //Expected: false
+
+checkAllEven([2, 4, 6]); //Expected: true
+//3)Half, Quarter and Eighth
+//Create a function that takes a number and return an array of three numbers: half of the number, quarter of the number and an eighth of the number.
+function getHalfQuarterEighth(number) {}
+getHalfQuarterEighth(6); //Expected:[3, 1.5, 0.75]
+
+//4)Add the index to the number
+//Given an array of numbers, create a function which returns the same array but with each element's index in the array added to itself. This means you add 0 to the number at index 0, add 1 to the number at index 1, etc...
+function addIndexes(arr) {}
+addIndexes([1, 4, 3, 4, 5]); //Expected: [1, 5, 5, 7, 9]
+
+//4)Get the Sum of All Array Elements
+//Create a function that takes an array and returns the sum of all numbers in the array.
+function getSumOfItems(arr) {}
+
+getSumOfItems([-2, 84, 23]); //Expected: 105

week-2/Homework/mandatory/0-freecodecamp.md → week-2/Homework/mandatory/0-introduction.md

@@ -1,4 +1,21 @@
-## FreeCodeCamp
+# Introducion
+
+## Instructions
+
+- Just making the tests become `passed` is not enough, you need to use the code already there, to help answer your the task properly
+- Read instructions in the README.md on how to make correct PRs to the main repo
+- Remember to use Google as much as you can help
+
+**Good Luck! Keep calm and code along**
+
+## Resources
+
+To get a better understanding of loops and arrays
+
+- [while and for loops](https://javascript.info/while-for)
+- [arrays](https://javascript.info/array)
+
+## Freecodecamp
 
 If you haven't already, you should complete all of these lessons on FreeCodeCamp - https://www.freecodecamp.org/learn
 

week-2/Homework/mandatory/1-fix-functions.js

@@ -1,6 +1,15 @@
+// Fix Functions
+
+// Aim: to understand the change code inside functions 
+//
 // The below functions are syntactically correct but not outputting the right results.
 // Look at the tests and see how you can fix them.
 
+
+
+// 1) mood function does this return `"I am not happy"`
+//    Only make edits inside the function
+
 function mood() {
   let isHappy = true;
 
@@ -11,9 +20,13 @@ function mood() {
   }
 }
 
+// 2) For any numerical value greater or equal to 10
+//    Hint: use constant `num` and only change isBigEnough.
+//    Variable isBigEnough needs to evaluate to a boolean
+
 function greaterThan10() {
-  let num = 10;
-  let isBigEnough;
+  const num = 10;
+  const isBigEnough;
 
   if (isBigEnough) {
     return "num is greater than or equal to 10";
@@ -22,20 +35,34 @@ function greaterThan10() {
   }
 }
 
+// 3) For any numerical value greater or equal to 10
+//    Hint: use the Array method sort()
+//    Remember to Google how to use sort method
+
 function sortArray() {
-  let letters = ["a", "n", "c", "e", "z", "f"];
+  const letters = ["a", "n", "c", "e", "z", "f"];
   let sortedLetters;
 
   return sortedLetters;
 }
 
+// 4) first5 function should return the first 5 elements of array
+//    Hint: use the Array method splice()
+//    Remember to Google how to use splice()
+
 function first5() {
   let numbers = [1, 2, 3, 4, 5, 6, 7, 8];
   let sliced;
 
   return sliced;
 }
 
+// 5) get3rdIndex function needs to take an array `arr` and give 
+//    back third element value.
+//    For example with array `[1, 2, 3, 4, 5]` it needs to return `4`
+//
+//    Hint: remember that arrays are zero-index based
+
 function get3rdIndex(arr) {
   let index = 3;
   let element;
@@ -82,7 +109,7 @@ test("first5 function works", arraysEqual(first5(), [1, 2, 3, 4, 5]));
 test(
   "get3rdIndex function works - case 1",
   get3rdIndex(["fruit", "banana", "apple", "strawberry", "raspberry"]) ===
-    "strawberry"
+  "strawberry"
 );
 test(
   "get3rdIndex function works - case 2",

week-2/Homework/mandatory/2-function-creation.js

@@ -37,9 +37,7 @@ Write a function that:
 - numbers greater 100 must be replaced with 100
 */
 
-function formatPercentage(arr) {
-
-}
+function formatPercentage(arr) {}
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
@@ -72,7 +70,7 @@ test(
     "daniel",
     "irina",
     "gordon",
-    "ashleigh"
+    "ashleigh",
   ])
 );
 test(
@@ -101,7 +99,7 @@ test(
     "c",
     "d",
     "e",
-    "f"
+    "f",
   ])
 );
 
@@ -111,6 +109,6 @@ test(
     "23%",
     "18%",
     "100%",
-    "0.37%"
+    "0.37%",
   ])
-);
+);

week-2/Homework/mandatory/3-playing-computer.js

@@ -1,3 +1,9 @@
+// Playing computer
+//
+// Aim: to understand and predict the answers of loops, and if statmetns
+//
+// You need write the answers of the below questions  1-7
+
 /*
   You have to predict the output of this program WITHOUT EXECUTING IT.
 
@@ -18,11 +24,11 @@
 let x = 2;
 let a = 6;
 
-const f1 = function(a, b) {
+const f1 = function (a, b) {
   return a + b;
 };
 
-const f2 = function(a, b) {
+const f2 = function (a, b) {
   return a + b + x;
 };
 

week-2/Homework/mandatory/4-sorting-algorithm.js

@@ -1,3 +1,9 @@
+// Sorting Algorithms
+//
+// Aim: to understand the work of loops and nested loops and array methods
+//
+// You need to create the function sortAges that takes one array as parameter input
+
 /*
 At the start of the course, you worked in teams to sort your team members, labelled by
 numbers, in ascending or descending order.
@@ -6,15 +12,17 @@ Today, you will be applying the sorting algorithm you used in that exercise in c
 
 Create a function called sortAges which:
 - takes an array of mixed data types as input
-- removes any non-number data types without using the built-in javascript filter method
+- removes any non-number data types without using the built-in javascript filter method 
 - returns an array of sorted ages in ascending order 
   - HARD MODE - without using the built-in javascript sort method 😎
 
 You don't have to worry about making this algorithm work fast! The idea is to get you to
 "think" like a computer and practice your knowledge of basic JavaScript.
 */
-
-function sortAges(arr) {}
+//1)Create the function inside, Think about nested loops
+function sortAges(arr) {
+  //create function here
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 

week-3/Homework/mandatory/0-freecodecamp.md → week-3/Homework/mandatory/0- Introduction.md

@@ -2,6 +2,10 @@
 
 You should complete all of these FreeCodeCamp exercises - https://www.freecodecamp.org/learn
 
+Go to **JavaScript Algorithms and Data Structures Certification (300 hours)**
+
+Open section **Basic Data Structures** and do the following exercises
+
 - Introduction to the Basic Data Structure Challenges
 - Use an Array to Store a Collection of Data
 - Access an Array's Contents Using Bracket Notation
@@ -15,16 +19,8 @@ You should complete all of these FreeCodeCamp exercises - https://www.freecodeca
 - Check For The Presence of an Element With indexOf()
 - Iterate Through All an Array's Items Using For Loops
 - Create complex multi-dimensional arrays
-- Add Key-Value Pairs to JavaScript Objects
-- Modify an Object Nested Within an Object
-- Access Property Names with Bracket Notation
-- Use the delete Keyword to Remove Object Properties
-- Check if an Object has a Property
-- Iterate Through the Keys of an Object with a for...in Statement
-- Generate an Array of All Object Keys with Object.keys()
-- Modify an Array Stored in an Object
 
-and you should attempt all of these
+Then open **Basic Algorithm Scripting** and attempt all of these 
 
 - Convert Celsius to Fahrenheit
 - Reverse a String

week-3/Homework/mandatory/1-oxygen-levels.js

@@ -7,8 +7,26 @@ Their computer detects a list of nearby planets that have Oxygen in their atmosp
 To be safe, they need to land on the first unamed 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(). Let's look at a quick
+example before trying the exercise.
 */
 
+/* .replace() allows us to add something where we removed something*/
+let greeting = "Good Morning";
+greeting.replace('Morning', 'Evening'); // outputs Good Evening
+
+
+/* .substring() allows us to remove things from strings */
+let dessert = "ice cream and pancakes";
+
+let newdessert = dessert.substring(0, 9);
+
+console.log(newdessert); // returns ice cream
+
+/* + + + + + + + */
+/* Now try the exercise */
+
 function safeLevels() {
 
 }

week-3/Homework/mandatory/2-bush-berries.js

@@ -8,7 +8,25 @@
   Create a function which checks if the bush has ALL PINK berries and is safe for the astronauts to eat from the bush.
 
   Use the tests to confirm which message to return
-*/
+
+  This exercise can be solved in a few different ways. One way might include the array methods
+  .some() and .every(). The .some() method tests to see if some of the values (at least 1) in an array 
+  match what you're looking for and returns true or false. .every() will only return true 
+  if all values match watch you're looking for. Let's first look at an example that will 
+  teach you how to use these methods.
+ */
+
+let array = [12, 73, 92, 45, 100, 14, 61];
+
+array.some((value) => {return (value % 2 == 0)}); /* this will return true as SOME values 
+will have a remainder of 0 i.e. they are even numbers*/
+
+array.every((value) => {return (value % 2 == 0)}); /* this will return false as not ALL 
+values will have a remainder of 0 i.e. there are some odd numbers in the array too*/
+
+/* + + + + + + + + + + + + + + */
+
+/* Now try to complete the exercise */
 
 function bushChecker() {