London10-Onur-Atas-JavaScript-Core-1-Coursework-Week4

2-mandatory/1-create-functions.js

@@ -3,15 +3,18 @@ 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) {
+array.sort();
 }
 
 /*
@@ -24,7 +27,9 @@ Write a function that:
 - Removes any forward slashes (/) in the strings.
 - Makes the strings all lowercase.
 */
-function tidyUpString() {
+function tidyUpString(array) {
+ return array.map((array => array.trim().replace (/, ' ')));
+
 }
 
 /*
@@ -33,9 +38,14 @@ 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) {
+  return array.filter(function(element, idx) {
+    return idx !== index;
+  });
 }
 
+
+
 /*
 Write a function that:
 - Takes an array of numbers as input.
@@ -44,9 +54,18 @@ Write a function that:
 - Numbers greater 100 must be replaced with 100.
 */
 
-function formatPercentage() {
+function formatPercentage(numbers) {
+  return numbers.map(function(number) {
+
+    var roundedNumber = Math.round(number * 100) / 100;
+    var cappedNumber = Math.min(roundedNumber, 100);
+    var formattedPercentage = cappedNumber.toFixed(2) + "%";
+
+    return formattedPercentage;
+});
 }
 
+
 /* ======= TESTS - DO NOT MODIFY ===== */
 
 test("first5 function works for more than five elements", () => {

2-mandatory/2-oxygen-levels.js

@@ -11,7 +11,20 @@
     Some string methods that might help you here are .replace() and .substring().
 */
 
-function findSafeOxygenLevel() {}
+function findSafeOxygenLevel(planets) {
+
+    for (let i = 0; i < planets.length; i++) {
+
+    const planet = planets[i];
+    const oxygenLevel = Number(planet.substring(0, planet.length - 1));
+    if (oxygenLevel >= 19.5 && oxygenLevel <= 23.5) {
+    return planet;
+    }
+    }
+    return "No safe oxygen level found.";
+    }
+
+
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 

2-mandatory/3-bush-berries.js

@@ -22,7 +22,14 @@
 */
 
 function isBushSafe(berryArray) {
-  //Write your code here
+  const hasNonPinkBerries = berryArray.some(berry => berry !== 'pink');
+  const hasOnlyPinkBerries = !hasNonPinkBerries && berryArray.length > 0;
+
+  if (hasOnlyPinkBerries) {
+    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 +15,12 @@
 
 */
 
-function getSettlers() {}
+function getSettlers(colonisers) 
+{ const settlers = colonisers.filter(coloniser => {
+  return coloniser.startsWith('A') && coloniser.endsWith('family');
+});
+
+return settlers;}
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 

2-mandatory/5-eligible-students.js

@@ -7,7 +7,14 @@
   - Returns an array containing only the names of the who have attended AT LEAST 8 classes
 */
 
-function getEligibleStudents() {}
+function getEligibleStudents() {
+  const eligibleStudents = students
+    .filter(student => student.attendance >= 8)
+    .map(student => student.name);
+
+  return eligibleStudents;
+
+}
 
 /* ======= TESTS - DO NOT MODIFY ===== */
 

2-mandatory/7-lane-names.js

@@ -6,7 +6,10 @@
   HINT: string and array methods that could be helpful (indexOf, filter)
 */
 
-function getLanes() {}
+function getLanes(streetNames) {
+    return streetNames.filter(name => name.includes('Lane'));
+  }
+
 
 /* ======= TESTS - DO NOT MODIFY ===== */