diff --git a/src/advanced/advanced.js b/src/advanced/advanced.js index 8b2b193..29c9eb0 100644 --- a/src/advanced/advanced.js +++ b/src/advanced/advanced.js @@ -5,21 +5,66 @@ const nums = [1, 10, 3, 9, 4, 8, 5, 7, 6, 2, -5, -2, -4, -9] // eslint-disable-l // to prove you have done this, set the variable indexOfTen to the iteration index when you find 10 let hasTen = false let indexOfTen = -1 +for (let i = 0; i < nums.length; i++) { + if(nums[i] == 10){ + hasTen = true + indexOfTen = i + break + } + +} + // 2. Use a for loop to count how many numbers in the array are divisible by 3 let divisibleByThreeCount = 0 +for (let i = 0; i < nums.length; i++) { + if(nums[i] % 3 == 0){ + divisibleByThreeCount += 1 + } + +} // 3. use a for loop to find the average of the numbers in the array let average = 0 +let sum = 0 +for (let i = 0; i < nums.length; i++) { + sum += nums[i] + +} +average = sum / nums.length // 4. use a for loop to find the largest number in the array let largest = 0 +for (let i = 0; i < nums.length; i++) { + if(nums[i] > largest){ + largest = nums[i] + } +} + // 5. use a for loop to find the smallest number in the array let smallest = 100000 +for (let i = 0; i < nums.length; i++) { + if(nums[i] < smallest){ + smallest = nums[i] + } + +} // 6. find the median of the numbers in the array let median = 0 +let middle = Math.floor(nums.length / 2) +nums.sort() + +for (let i = 0; i < nums.length; i++) { + + if(nums.length % 2 !== 0){ + median = nums[middle] + } else { + median = Math.ceil((nums[middle - 1] + nums[middle]) / 2) + } +} + module.exports = { hasTen, diff --git a/src/extensions/nested-loops.js b/src/extensions/nested-loops.js index 1d0044b..ca43343 100644 --- a/src/extensions/nested-loops.js +++ b/src/extensions/nested-loops.js @@ -13,25 +13,86 @@ const deepThree = [] // 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 -// for (let i = 5; i < 7; i++) { -// Your code here -// } +for (let i = START; i <= END; i++) { + simpleOne.push(i) +} // 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 = START; i <= END; i++) { + + const x = [] + for (let j = 0; j < i; j++) { + x.push(i) + + } + nestedOne.push(x) + +} // 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 = START; i <= END; i++) { + const x = [] + for (let j = i; j >= 1; j--) { + x.push(j) + + } + nestedTwo.push(x) + +} // 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 = START; i <= END; i++) { + const x = [] + for (let j = 1; j <= i; j++) { + const y = [] + + for (let k = 1; k <= j; k++) { + y.push(i) + + } + x.push(y) + } + deepOne.push(x) + +} + +for (let i = START; i <= END; i++) { + const x = [] + + for (let j = 1; j <= i; j++) { -// 5. As 4, update array 'deepTwo' so that the result is: -// [[[1]],[[1],[1,2]],...] + const y = [] + for (let k = 1; k <= j; k++) { + y.push(k) + + } + x.push(y) + } + deepTwo.push(x) +} // 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 = START; i <= END; i++) { + const x = [] + for (let j = 1; j <= i; j++) { + let sumSquares = 0 + const y = [] + for (let k = 1; k <= j; k++) { + sumSquares += k * k + + } + let average = sumSquares / j + y.push(average) + x.push(y) + } + deepThree.push(x) + +} + module.exports = { START, END, diff --git a/src/for-loop-and-arrays.js b/src/for-loop-and-arrays.js index 6635155..28e4d5f 100644 --- a/src/for-loop-and-arrays.js +++ b/src/for-loop-and-arrays.js @@ -6,17 +6,35 @@ 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 - +for (let i = 0; i < nums.length; i++) { + sum += nums[i] +} // 2. Use a for loop to populate doubledNums with every value from nums array doubled (i.e [2, 6, 24, etc...]) const doubledNums = [] +for (let i = 0; i < nums.length; i++) { + doubledNums.push(nums[i]*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 = 1; i < nums.length; i+=2) { + + 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 = { diff --git a/src/for-loop-basic.js b/src/for-loop-basic.js index dc3775a..5b28f24 100644 --- a/src/for-loop-basic.js +++ b/src/for-loop-basic.js @@ -4,13 +4,28 @@ const evenNums = [] const countdown = [] // TODO: 1. Write a for loop that adds the numbers 0 to 3 to the numsZeroToThree array +for (let index = 0; index < 4; index++) { + numsZeroToThree.push(index) +} // TODO: 2. Write a for loop that adds the numbers 5 to 10 to the numsFiveToTen array -// 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 = 5; i < 11; 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 < 7; i++) { + if(i % 2 == 0){ + 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 = { a: numsZeroToThree,