week-3-JavaScript-HomeWork(All+)

Author: zubedauk

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

@@ -3,6 +3,7 @@
  Using .find(), we'd like to find the first name which starts with A and is longer than 7 letters.
 */
 
+
 // write your code here
 functionfindLongNameThatStartsWithA(names){
 letoutput=names.find(function(name){

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

@@ -6,12 +6,21 @@
  - Do not edit any of the existing code
 */
 
-varpairsByIndex=[[0,3],[1,2],[2,1],null,[3,0]];
 
+varpairsByIndex=[[0,3],[1,2],[2,1],null,[3,0]];
+lettest=pairsByIndex.some(function(value){
+returnvalue===null;
+})
+if(test){
+console.log("array contain null value");
+process.exit(1)
+}
+else{
 // 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
 // process.exit(1);
 
+
 varstudents=["Islam","Lesley","Harun","Rukmini"];
 varmentors=["Daniel","Irina","Mozafar","Luke"];
 
@@ -22,3 +31,4 @@ var pairs = pairsByIndex.map(function(indexes) {
 });
 
 console.log(pairs);
+}

week-3/1-exercises/C-array-every/exercise.js

@@ -5,7 +5,9 @@
 varstudents=["Omar","Austine","Dany","Swathi","Lesley","Rukmini"];
 vargroup=["Austine","Dany","Swathi","Daniel"];
 
-vargroupIsOnlyStudents;// complete this statement
+vargroupIsOnlyStudents=group.every(function(name){
+returnstudents.includes(name);
+});// complete this statement
 
 if(groupIsOnlyStudents){
 console.log("The group contains only students");

week-3/1-exercises/D-array-filter/exercise.js

@@ -1,14 +1,17 @@
 /*
  You are given a program that logs pairings between mentors and students
- It fails because the array `pairsById` can contain different values that break the program
+ It fails because the array `pairsById` can contain different values that 
+ break the program
  It is decided that array items which are not pairs should be filtered out
  - Finish the statement on line 11 to produce an array with valid content
  - Do not edit any of the existing code
 */
 
 varpairsByIndexRaw=[[0,3],[1,2],[2,1],null,[1],false,"whoops"];
 
-varpairsByIndex;// Complete this statement
+varpairsByIndex=pairsByIndexRaw.filter(function(value){
+returnArray.isArray(value)&&value.length>1;
+});// Complete this statement
 
 varstudents=["Islam","Lesley","Harun","Rukmini"];
 varmentors=["Daniel","Irina","Mozafar","Luke"];

week-3/1-exercises/E-array-map/exercise.js

@@ -2,4 +2,12 @@
 // Write multiple solutions using different syntax (as shown in the README)
 
 varnumbers=[0.1,0.2,0.3,0.4,0.5];
-
+varbrandNewArray;
+brandNewArray=numbers.map(function(num){
+returnnum*100;
+})
+brandNewArray=numbers.map(num=>{
+returnnum*100;
+})
+brandNewArray=numbers.map(num=>num*100);
+console.log(brandNewArray);

week-3/1-exercises/F-array-forEach/exercise.js

@@ -8,7 +8,21 @@
 */
 
 vararr=[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15];
-
+varoutput=arr.forEach(function(num,index){
+if(num%3===0&&num%5===0){
+console.log("FizzBuzz");
+}
+elseif(num%5===0){
+console.log("Buzz");
+}
+elseif(num%3===0){
+console.log("Fizz");
+}
+else{
+console.log(num);
+}
+})
+console.log(output);
 /* EXPECTED OUTPUT */
 
 /*

week-3/1-exercises/G-array-methods/exercise.js

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

week-3/1-exercises/G-array-methods/exercise2.js

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

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

@@ -9,8 +9,11 @@ To be safe to land on, a planet needs to have an Oxygen level between 19.5% and
 Write a function that finds the first safe oxygen level in the array - Oxygen between 19.5% and 23.5%
 */
 
-functionsafeLevels(){
-
+functionsafeLevels(arr){
+varfindLevel=arr.find(function(level){
+returnparseFloat(level)>19.5&&parseFloat(level)<23.5;
+})
+returnfindLevel;
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */

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

@@ -10,8 +10,16 @@
  Use the tests to confirm which message to return
 */
 
-functionbushChecker(){
-
+functionbushChecker(arr){
+if(arr.every(function(barries){
+returnbarries==="pink";
+})){
+return"Bush is safe to eat from";
+}
+else{
+return"Toxic! Leave bush alone!";
+
+}
 }
 
 /* ======= TESTS - DO NOT MODIFY ===== */