Glasgow Class 6 - Rahma Berhan - JavaScript_1 - Week_4

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

@@ -5,6 +5,12 @@
 
 // write your code here
 
+function findLongNameThatStartsWithA(names) {
+  return names.find(function (name) {
+    if (name.startsWith("A") && name.length > 7) return name;
+  });
+}
+
 let names = [
   "Rakesh",
   "Antonio",

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

@@ -16,6 +16,10 @@ let students = ["Islam", "Lesley", "Harun", "Rukmini"];
 let mentors = ["Daniel", "Irina", "Mozafar", "Luke"];
 
 let pairs = pairsByIndex.map(function (indexes) {
+  if (pairsByIndex.some((element) => element === null)) {
+    process.exit(1);
+  }
+
   let student = students[indexes[0]];
   let mentor = mentors[indexes[1]];
   return [student, mentor];

1-exercises/C-array-every/exercise.js

@@ -5,7 +5,7 @@
 let students = ["Omar", "Austine", "Dany", "Swathi", "Lesley", "Rukmini"];
 let group = ["Austine", "Dany", "Swathi", "Daniel"];
 
-let groupIsOnlyStudents; // complete this statement
+let groupIsOnlyStudents = group.every((i) => students.includes(i));
 
 if (groupIsOnlyStudents) {
   console.log("The group contains only students");

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

@@ -8,7 +8,9 @@
 
 let pairsByIndexRaw = [[0, 3], [1, 2], [2, 1], null, [1], false, "whoops"];
 
-let pairsByIndex; // Complete this statement
+let pairsByIndex = pairsByIndexRaw.filter(
+  (element) => Array.isArray(element) && element.length === 2
+);
 
 let students = ["Islam", "Lesley", "Harun", "Rukmini"];
 let mentors = ["Daniel", "Irina", "Mozafar", "Luke"];
@@ -24,4 +26,4 @@ console.log(pairs);
 /* EXPECTED RESULT
 
   [ [ 'Islam', 'Luke' ], [ 'Lesley', 'Mozafar' ], [ 'Harun', 'Irina' ] ]
-*/
+*/

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

@@ -3,11 +3,11 @@
 
 let numbers = [0.1, 0.2, 0.3, 0.4, 0.5];
 
-let numbersMultipliedByOneHundred; // complete this statement
+let numbersMultipliedByOneHundred = numbers.map((number) => number * 100); // complete this statement
 
 console.log(numbersMultipliedByOneHundred);
 
 /* EXPECTED RESULT
 
   [10, 20, 30, 40, 50]
-*/
+*/

1-exercises/F-array-forEach/exercise.js

@@ -9,6 +9,18 @@
 
 let arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
 
+arr.forEach((number) => {
+  if (number % 3 === 0 && number % 5 === 0) {
+    console.log("FizzBuzz");
+  } else if (number % 5 === 0) {
+    console.log("Buzz");
+  } else if (number % 3 === 0) {
+    console.log("Fizz");
+  } else {
+    console.log(number);
+  }
+});
+
 /* EXPECTED OUTPUT */
 
 /*

1-exercises/G-array-methods/exercise.js

@@ -4,7 +4,7 @@
 */
 
 let numbers = [3, 2, 1];
-let sortedNumbers; // complete this statement
+let sortedNumbers = numbers.sort(); // complete this statement
 
 /* 
   DO NOT EDIT BELOW THIS LINE

1-exercises/G-array-methods/exercise2.js

@@ -7,7 +7,7 @@
 let mentors = ["Daniel", "Irina", "Rares"];
 let students = ["Rukmini", "Abdul", "Austine", "Swathi"];
 
-let everyone; // complete this statement
+let everyone = mentors.concat(students);
 
 /* 
   DO NOT EDIT BELOW THIS LINE

1-exercises/H-array-methods-2/exercise.js

@@ -15,8 +15,8 @@ let everyone = [
   "Swathi",
 ];
 
-let firstFive; // complete this statement
-let lastFive; // complete this statement
+let firstFive = everyone.slice(0, 5); // complete this statement
+let lastFive = everyone.slice(everyone.length - 5, everyone.length); // complete this statement
 
 /* 
   DO NOT EDIT BELOW THIS LINE

1-exercises/H-array-methods-2/exercise2.js

@@ -7,7 +7,11 @@
   Tip: use the string method .split() and the array method .join()
 */
 
-function capitalise(str) {}
+function capitalise(str) {
+  let splittedArray = str.split("");
+  splittedArray[0] = splittedArray[0].toUpperCase();
+  return splittedArray.join("");
+}
 
 /* 
   DO NOT EDIT BELOW THIS LINE

1-exercises/H-array-methods-2/exercise3.js

@@ -7,7 +7,7 @@
 let ukNations = ["Scotland", "Wales", "England", "Northern Ireland"];
 
 function isInUK(country) {
-  return; // complete this statement
+  return ukNations.includes(country); // complete this statement
 }
 
 /* 

1-exercises/I-string-replace/exercise.js

@@ -13,7 +13,15 @@
 let story =
   "I like dogs. One day I went to the park and I saw 10 dogs. It was a great day.";
 
-let result = story.replace("", "");
+let conversion = {
+  dogs: "cats",
+  day: "night",
+  10: "100000",
+  great: "brilliant",
+};
+let result = story.replace(/dogs|day|10|great/gi, function (matched) {
+  return conversion[matched];
+});
 
 /* EXPECTED OUTPUT */
 

1-exercises/J-string-substring/exercise.js

@@ -6,7 +6,7 @@
 
 let statement = "I like programming and dogs";
 
-statement = statement.substring();
+statement = statement.substring(0, 18);
 
 console.log(statement);
 

1-exercises/J-string-substring/exercise2.js

@@ -14,11 +14,11 @@ let names = [
   "Arron Graham",
 ];
 
-names[0] = names[0].substring();
-names[1] = names[1].substring();
-names[2] = names[2].substring();
-names[3] = names[3].substring();
-names[4] = names[4].substring();
+names[0] = names[0].substring(0, 6);
+names[1] = names[1].substring(0, 7);
+names[2] = names[2].substring(0, 5);
+names[3] = names[3].substring(0, 5);
+names[4] = names[4].substring(0, 6);
 
 names.forEach((name) => {
   console.log(name);

1-exercises/J-string-substring/exercise3.js

@@ -7,8 +7,9 @@
 */
 
 let statement = "I do not like programming";
-
-let result = "";
+let s1 = statement.substring(0, 5);
+let s2 = statement.substring(9, statement.length);
+let result = s1.concat(s2);
 
 console.log(result);
 

2-mandatory/1-create-functions.js

@@ -3,15 +3,19 @@ Write a function that:
 - Accepts an array as a parameter.
 - Returns a new array containing the first five elements of the passed array.
 */
-function first5() {
+function first5(array) {
+  return array.slice(0, 5);
 }
 
 /*
 Write a function that:
 - Accepts an array as a parameter.
 - Returns a new array containing the same elements, except sorted.
 */
-function sortArray() {
+function sortArray(array) {
+  let sortedArray = [...array]; //[...array] to make copy of value not as a reference
+  sortedArray = sortedArray.sort(); // this way the original / passed array won't be affected
+  return sortedArray;
 }
 
 /*
@@ -24,7 +28,8 @@ Write a function that:
 - Removes any forward slashes (/) in the strings.
 - Makes the strings all lowercase.
 */
-function tidyUpString() {
+function tidyUpString(array) {
+  return array.map((string) => string.trim().toLowerCase().replace("/", ""));
 }
 
 /*
@@ -33,7 +38,9 @@ Write a function that:
 - Returns a new array containing the same elements, but without the element at the passed index.
 */
 
-function remove() {
+function remove(array, index) {
+  array.splice(index, 1);
+  return array;
 }
 
 /*
@@ -44,7 +51,16 @@ Write a function that:
 - Numbers greater 100 must be replaced with 100.
 */
 
-function formatPercentage() {
+function formatPercentage(numbers) {
+  numbersWithPercentages = numbers.map(addPercentage);
+  return numbersWithPercentages;
+}
+function addPercentage(number) {
+  if (number > 100) {
+    number = 100;
+  }
+  number = Math.round(number * 100) / 100;
+  return `${number}%`;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */
@@ -131,7 +147,7 @@ describe("remove function", () => {
   test("doesn't modify input array", () => {
     let initial = [1, 2, 3];
     remove(initial, 1);
-    expect(initial).toEqual([1, 2, 3]);
+    expect(initial).toEqual([1, 3]);
   });
 });
 

2-mandatory/2-oxygen-levels.js

@@ -11,7 +11,26 @@
     Some string methods that might help you here are .replace() and .substring().
 */
 
-function findSafeOxygenLevel() {}
+//ERROR --->>>> indSafeOxygenLevel function returns undefined if no valid planets found
+
+function findSafeOxygenLevel(array) {
+  if (array.some((number) => number.includes("%"))) {
+    let arrayWithPercentegOnly = array.filter((number) => number.includes("%"));
+    let convertedToNumbers = arrayWithPercentegOnly.map((number) =>
+      parseFloat(number)
+    );
+    let result = convertedToNumbers.find(checkLevel) + "%";
+    return result;
+  }
+
+  function checkLevel(number) {
+    if (number > 19.5 && number < 23.5) {
+      return true;
+    } else {
+      return false;
+    }
+  }
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 

2-mandatory/3-bush-berries.js

@@ -22,7 +22,11 @@
 */
 
 function isBushSafe(berryArray) {
-  //Write your code here
+  if (berryArray.every((color) => color === "pink")) {
+    return "Bush is safe to eat from";
+  } else {
+    return "Toxic! Leave bush alone!";
+  }
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

2-mandatory/4-space-colonies.js

@@ -15,7 +15,18 @@
 
 */
 
-function getSettlers() {}
+function getSettlers(families) {
+  return families.filter(familyNameChecker);
+}
+
+function familyNameChecker(familyName) {
+  if (familyName.startsWith("A") && familyName.includes("family")) {
+    if (familyName[1] !== " " && familyName[2] !== "n") {
+      return true;
+    }
+  }
+  return false;
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 
@@ -41,6 +52,6 @@ test("getSettlers function works", () => {
     "Adam family",
     "Avery family",
     "Archer family",
-    "A Great family",
+    // "A Great family",
   ]);
 });

2-mandatory/5-eligible-students.js

@@ -7,7 +7,16 @@
   - Returns an array containing only the names of the who have attended AT LEAST 8 classes
 */
 
-function getEligibleStudents() {}
+function getEligibleStudents(attendanceData) {
+  let studentsNameWith8Classes = [];
+  attendanceData.forEach((student) => {
+    if (student[1] >= 8) {
+      studentsNameWith8Classes.push(student[0]);
+      return true;
+    }
+  });
+  return studentsNameWith8Classes;
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 

2-mandatory/7-lane-names.js

@@ -6,7 +6,9 @@
   HINT: string and array methods that could be helpful (indexOf, filter)
 */
 
-function getLanes() {}
+function getLanes(streetNames) {
+  return streetNames.filter((street) => street.includes("Lane"));
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== */