Max Olofsson

src/extensions/nested-loops.js

@@ -10,6 +10,9 @@ const deepThree = []
 
 // 1. Using a for loop from 1 to 10, add the value of the 'loop index' to the array 'simpleOne'
 //    eg [1,2,3...]
+for (let i = 1; i <= 10; ++i) {
+  simpleOne.push(i)
+}
 
 // HINT: in the below loop, the statements and block of code needs to be changed
 // HINT: in the below loop, the var i represents the loop index
@@ -19,18 +22,58 @@ const deepThree = []
 
 // 2. Using nested for loops, add arrays to 'nestedOne' where each array has n copies of the outer 'loop index'
 //    eg [[1],[2,2],...]
+for (let i = 1; i <= 10; ++i) {
+  const toAdd = []
+  for (let j = 0; j <= i - 1; ++j) toAdd.push(i)
+  nestedOne.push(toAdd)
+}
 
 // 3. As 2, but each array should contain the values from the outer 'loop index' to 1 inclusive. Update array 'nestedTwo'
 //    eg [[1],[2,1],...]
+for (let i = 1; i <= 10; ++i) {
+  const toAdd = []
+  for (let j = i; j >= 1; --j) toAdd.push(j)
+  nestedTwo.push(toAdd)
+}
 
 // 4. As 2, but each array should contain arrays from 1 to the outer 'loop index' with the value of the outer 'loop index'. Update array 'deepOne'
 //    eg [[[1]],[[2],[2,2]],...]
+for (let i = 1; i <= 10; ++i) {
+  const toAdd = []
+  for (let j = 1; j <= i; ++j) {
+    const toAdd2 = []
+    for (let k = 1; k <= j; ++k) toAdd2.push(i)
+    toAdd.push(toAdd2)
+  }
+
+  deepOne.push(toAdd)
+}
 
 // 5. As 4, update array 'deepTwo' so that the result is:
 //       [[[1]],[[1],[1,2]],...]
+for (let i = 1; i <= 10; ++i) {
+  const toAdd = []
+  for (let j = 1; j <= i; ++j) {
+    const toAdd2 = []
+    for (let k = 1; k <= j; ++k) toAdd2.push(k)
+    toAdd.push(toAdd2)
+  }
+  deepTwo.push(toAdd)
+}
 
 // 6. As 5, update the array 'deepThree', but the result should be the average of the sum of the squares of the numbers in each array
 //       [[1],[[1],[2.5]],...]
+for (let i = 1; i <= 10; ++i) {
+  const toAdd = []
+  for (let j = 1; j <= i; ++j) {
+    const toAdd2 = []
+    let sum = 0
+    for (let k = 1; k <= j; ++k) sum += k * k
+    toAdd2.push(sum / j)
+    toAdd.push(toAdd2)
+  }
+  deepThree.push(toAdd)
+}
 
 module.exports = {
   START,

src/for-loop-and-arrays.js

@@ -6,17 +6,33 @@ let word = '' // eslint-disable-line prefer-const
 // TODO: Add code below this line to make the tests pass
 
 // 1. Use a for loop to set the sum variable to the sum of all the values in nums
+nums.forEach(element => {
+  sum += element
+});
 
 // 2. Use a for loop to populate doubledNums with every value from nums array doubled (i.e [2, 6, 24, etc...])
 const doubledNums = []
+nums.forEach(num => {
+  doubledNums.push(num * 2)
+})
 
 // 3. Use a for loop to set word variable equal to all the letters in the letters array combined as a single string
+for(let i = 0 ; i < letters.length ; ++i){
+  word += letters[i]
+}
 
 // 4. Use a for loop to populate everySecondNum with every second number from the nums array
 const everySecondNum = []
+for(let i = 0 ; i < nums.length ; ++i){
+  if(i % 2 == 0) continue
+  everySecondNum.push(nums[i])
+}
 
 // 5. Use a for loop to populate numsReversed with the numbers from nums in reverse order
 const numsReversed = []
+for(let i = nums.length -1; i >= 0; --i){
+  numsReversed.push(nums[i])
+}
 
 // do not change below this line
 module.exports = {

src/for-loop-basic.js

@@ -4,12 +4,25 @@ const evenNums = []
 const countdown = []
 
 // TODO: 1. Write a for loop that adds the numbers 0 to 3 to the numsZeroToThree array
+for(let i = 0; i <= 3; ++i){
+  numsZeroToThree.push(i)
+}
 
 // TODO: 2. Write a for loop that adds the numbers 5 to 10 to the numsFiveToTen array
+for(let i = 5; i <= 10; ++i){
+  numsFiveToTen.push(i)
+}
 
 // TODO: 3. Write a for loop that adds all the even numbers between 0 and 6 (0, 2, 4, 6) to evenNums
+for(let i = 0; i <= 6; i += 2){
+  evenNums.push(i)
+}
 
 // TODO: 4. Write a for loop that adds the numbers 3 to 0 (in that order) to the countdown array
+for(let i = 3; i >= 0; i--){
+  countdown.push(i)
+}
+
 
 // do not change below this line
 module.exports = {