Ebenezer wk3

week-1/1-exercises/J-functions/exercise.js

@@ -1,5 +1,6 @@
 function halve(number) {
   // complete the function here
+  return number / 2;
 }
 
 var result = halve(12);

week-1/3-extra/2-piping.js

@@ -16,15 +16,15 @@
   the final result to the variable goodCode
 */
 
-function add() {
-
+function add(num1, num2) {
+  return num1 + num2;
 }
 
-function multiply() {
-
+function multiply(num1, num3) {
+  return num1 * num2;
 }
 
-function format() {
+function format(num) {
 
 }
 

week-2/1-exercises/B-boolean-literals/exercise.js

@@ -5,7 +5,10 @@
   Add the required variables with the correct boolean values assigned.
 */
 
-var codeYourFutureIsGreat = true;
+const codeYourFutureIsGreat = false;
+const mozafarIsCool = false;
+const calculationCorrect = true;
+const moreThan10Students = false;
 
 /* 
   DO NOT EDIT BELOW THIS LINE

week-2/1-exercises/D-predicates/exercise.js

@@ -6,21 +6,17 @@
 */
 
 // Finish the predicate function to test if the passed number is negative (less than zero)
-function isNegative(number) {
-
-}
+function isNegative(number) {}
 
 // Finish the predicate function to test if the passed number is between 0 and 10
-function isBetweenZeroAnd10(number) {
-
-}
+function isBetweenZeroAnd10(number) {}
 
 /* 
   DO NOT EDIT BELOW THIS LINE
   --------------------------- */
-var number = 5;
-var numberNegative = isNegative(number);
-var numberBetweenZeroAnd10 = isBetweenZeroAnd10(number);
+const number = 5;
+const numberNegative = isNegative(number);
+const numberBetweenZeroAnd10 = isBetweenZeroAnd10(number);
 console.log("The number in test is " + number);
 console.log("Is the number negative? " + numberNegative);
 console.log("Is the number between 0 and 10? " + numberBetweenZeroAnd10);
@@ -32,4 +28,3 @@ console.log("Is the number between 0 and 10? " + numberBetweenZeroAnd10);
   Is the number negative? false
   Is the number between 0 and 10? true
 */
-

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

@@ -1,45 +1,42 @@
 // The below functions are syntactically correct but not outputting the right results.
 // Look at the tests and see how you can fix them.
 
-function mood() {
-  let isHappy = true;
-
+function mood(isHappy) {
+  // let isHappy = true;
   if (isHappy) {
     return "I am happy";
-  } else {
-    return "I am not happy";
   }
+  return "I am not happy";
 }
 
-function greaterThan10() {
+function greaterThan10(isBigEnough) {
   let num = 10;
-  let isBigEnough;
-
-  if (isBigEnough) {
+  // let isBigEnough;
+  if (num >= 10) {
     return "num is greater than or equal to 10";
   } else {
     return "num is not big enough";
   }
 }
 
 function sortArray() {
-  let letters = ["a", "n", "c", "e", "z", "f"];
+  const letters = ["a", "n", "c", "e", "z", "f"];
   let sortedLetters;
-
+  sortedLetters = letters.sort();
   return sortedLetters;
 }
 
 function first5() {
-  let numbers = [1, 2, 3, 4, 5, 6, 7, 8];
+  const numbers = [1, 2, 3, 4, 5, 6, 7, 8];
   let sliced;
-
+  sliced = numbers.slice(0, 5);
   return sliced;
 }
 
 function get3rdIndex(arr) {
-  let index = 3;
+  const index = 3;
   let element;
-
+  element = arr[index];
   return element;
 }
 

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

@@ -5,7 +5,9 @@ Write a function that:
 - removes any forward slashes (/) in the strings
 - makes the string all lowercase
 */
-function tidyUpString(strArr) {}
+ function tidyUpString(strArr) {
+
+ }
 
 /*
 Complete the function to check if the variable `num` satisfies the following requirements:
@@ -15,7 +17,16 @@ Complete the function to check if the variable `num` satisfies the following req
 Tip: use logical operators
 */
 
-function validate(num) {}
+function validate(num) {
+ if ((typeof num === 'number') && (num % 2 === 0) && (num <= 100))
+  {
+ return true;
+  }
+  else 
+  {
+   return false;
+  }
+}
 
 /* 
 Write a function that removes an element from an array
@@ -26,7 +37,8 @@ The function must:
 */
 
 function remove(arr, index) {
-  return; // complete this statement
+ const removed = arr.splice(index, 1);
+  return arr;
 }
 
 /*
@@ -38,6 +50,17 @@ Write a function that:
 */
 
 function formatPercentage(arr) {
+  const percentage = arr.map(function(n) {
+    if (n < 100)
+    { 
+      console.log(`${Number(n.toFixed(2))}%`); 
+    } 
+    else 
+    {
+     console.log("100%");
+    }
+
+  })
 
 }
 
@@ -72,7 +95,7 @@ test(
     "daniel",
     "irina",
     "gordon",
-    "ashleigh"
+    "ashleigh",
   ])
 );
 test(
@@ -101,7 +124,7 @@ test(
     "c",
     "d",
     "e",
-    "f"
+    "f",
   ])
 );
 
@@ -111,6 +134,6 @@ test(
     "23%",
     "18%",
     "100%",
-    "0.37%"
+    "0.37%",
   ])
-);
+);

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

@@ -6,13 +6,14 @@
 
   Answer the following questions:
 
-  1. This program throws an error. Why? (If you can't find it, try executing it).
-  2. Remove the line that throws the error.
-  3. What is printed to the console?
-  4. How many times is "f1" called?
-  5. How many times is "f2" called?
-  6. What value does the "a" parameter take in the first "f1" call?
-  7. What is the value of the "a" outer variable when "f1" is called for the first time?
+  1. This program throws an error. Why? (If you can't find it, try executing it). Ans: ReferenceError: b is not defined. 
+                                                             Trying to console out b which is not a defined variable outside the function block.
+  2. Remove the line that throws the error. Ans: console.log(b) is removed.
+  3. What is printed to the console? Ans: console prints out 2 6 4 9 6 13 8
+  4. How many times is "f1" called? Ans: f1 is the else which is 9 and 13 ( twice)
+  5. How many times is "f2" called? Ans: f2 even numbers are 2 , 6, 4, 6, 8 (5 times)
+  6. What value does the "a" parameter take in the first "f1" call? Ans: 1st parameter call a = 6
+  7. What is the value of the "a" outer variable when "f1" is called for the first time? Ans: a + 1 = 7 
 */
 
 let x = 2;
@@ -28,7 +29,7 @@ const f2 = function(a, b) {
 
 console.log(x);
 console.log(a);
-console.log(b);
+// console.log(b);
 
 for (let i = 0; i < 5; ++i) {
   a = a + 1;

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

@@ -14,7 +14,15 @@ You don't have to worry about making this algorithm work fast! The idea is to ge
 "think" like a computer and practice your knowledge of basic JavaScript.
 */
 
-function sortAges(arr) {}
+function sortAges(arr) {
+const sorted = arr.filter(function(value) {
+    return typeof value === "number"
+});
+ const ascendSort  = sorted.sort(function(a, b) {
+   return a - b;
+ })
+return ascendSort;
+ }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 

week-3/1-exercises/A-array-find/exercise.js

@@ -7,6 +7,10 @@
 
 var names = ["Rakesh", "Antonio", "Alexandra", "Andronicus", "Annam", "Mikey", "Anastasia", "Karim", "Ahmed"];
 
+var findName = names.find(name => {
+  return name.charAt(0) || name.length > 7;
+})
+
 var longNameThatStartsWithA = findLongNameThatStartsWithA(names);
 
 console.log(longNameThatStartsWithA);

week-3/1-exercises/B-array-some/exercise.js

@@ -6,7 +6,7 @@
   - Do not edit any of the existing code
 */
 
-var pairsByIndex = [[0, 3], [1, 2], [2, 1], null, [3, 0]];
+var pairsByIndex = [[0, 3], [1, 2], [2, 1],null,[3, 0]];
 
 // If there is a null value in the array exit the program with the error code
 // https://nodejs.org/api/process.html#process_process_exit_code
@@ -18,7 +18,14 @@ var mentors = ["Daniel", "Irina", "Mozafar", "Luke"];
 var pairs = pairsByIndex.map(function(indexes) {
   var student = students[indexes[0]];
   var mentor = mentors[indexes[1]];
-  return [student, mentor];
+  const nullCheck = (element) => element === null;
+  if(pairsByIndex.some(nullCheck) === true) {
+    process.exit(1)
+  }
+  else
+  {return [student, mentor];}
+
 });
 
+
 console.log(pairs);

week-3/2-mandatory/1-oxygen-levels.js

@@ -9,32 +9,51 @@ To be safe, they need to land on the first unamed planet that has Oxygen levels
 Write a function that finds the oxygen level of the first safe planet - Oxygen between 19.5% and 23.5%
 */
 
-function safeLevels() {
-
+function safeLevels(arr) {
+   const convert = arr.map(function(level) {
+   return (parseFloat(level))
+}) 
+console.log(convert);
+const levels = convert.filter(function(n) {
+  return n > 19.5 && n < 23.5;
+})
+return `${levels[0]}%`
 }
 
+
 /* ======= TESTS - DO NOT MODIFY ===== */
 
-const oxygenLevels1 = ["24.2%", "11.3%", "19.9%", "23.1%", "29.3%", "20.2%"]
-const oxygenLevels2 = ["30.8%", "23.5%", "18.8%", "19.5%", "20.2%", "31.6%"]
+const oxygenLevels1 = ["24.2%", "11.3%", "19.9%", "23.1%", "29.3%", "20.2%"];
+const oxygenLevels2 = ["30.8%", "23.5%", "18.8%", "19.5%", "20.2%", "31.6%"];
+const oxygenLevels3 = ["200%", "21.1%"];
+
+const util = require('util');
 
-function test(test_name, expr) {
+function test(test_name, actual, expected) {
     let status;
-    if (expr) {
-      status = "PASSED";
+    if (actual === expected) {
+        status = "PASSED";
     } else {
-      status = "FAILED";
+        status = `FAILED: expected: ${util.inspect(expected)} but your function returned: ${util.inspect(actual)}`;
     }
-  
+
     console.log(`${test_name}: ${status}`);
 }
 
 test(
-    "safeLevels function works - case 2",
-    safeLevels(oxygenLevels1) === "19.9%"
+    "safeLevels function works - case 1",
+    safeLevels(oxygenLevels1),
+    "19.9%"
 );
 
 test(
     "safeLevels function works - case 2",
-    safeLevels(oxygenLevels2) === "20.2%"
+    safeLevels(oxygenLevels2),
+    "20.2%"
+);
+
+test(
+    "safeLevels function works - case 3",
+    safeLevels(oxygenLevels3),
+    "21.1%"
 );