From f2e8f3b6b67b46ca2ac51a303b4bc216a7287ddc Mon Sep 17 00:00:00 2001 From: Tuva Aarseth Date: Mon, 23 Sep 2024 13:01:40 +0200 Subject: [PATCH] Completed all exercises --- src/advanced/advanced.js | 33 +++++++++++++++++++ src/extensions/nested-loops.js | 58 ++++++++++++++++++++++++++++++++-- src/for-loop-and-arrays.js | 19 +++++++++++ src/for-loop-basic.js | 16 ++++++++++ 4 files changed, 123 insertions(+), 3 deletions(-) diff --git a/src/advanced/advanced.js b/src/advanced/advanced.js index 8b2b193..83edd6f 100644 --- a/src/advanced/advanced.js +++ b/src/advanced/advanced.js @@ -6,21 +6,54 @@ const nums = [1, 10, 3, 9, 4, 8, 5, 7, 6, 2, -5, -2, -4, -9] // eslint-disable-l let hasTen = false let indexOfTen = -1 +for (let i = 0; i < nums.length; i++) { + if (nums[i] === 10) { + indexOfTen = i + hasTen = true + 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++ + } +} + // 3. use a for loop to find the average of the numbers in the array let average = 0 +for (let i = 0; i < nums.length; i++) { + average += nums[i] +} +average = average / 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 +nums.sort((a, b) => a - b) +const medNum = nums.splice(nums.length / 2 - 1, 2) +console.log(medNum) +median = (medNum[0] + medNum[1] - 1) / 2 module.exports = { hasTen, indexOfTen, diff --git a/src/extensions/nested-loops.js b/src/extensions/nested-loops.js index 1d0044b..2b9314a 100644 --- a/src/extensions/nested-loops.js +++ b/src/extensions/nested-loops.js @@ -13,25 +13,77 @@ 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 = 1; i < 11; 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 = 1; i <= 10; i++) { + const temp = [] + for (let k = 1; k <= i; k++) { + temp.push(i) + } + nestedOne.push(temp) +} + // 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 temp = [] + for (let k = i; k > 0; k--) { + temp.push(k) + } + nestedTwo.push(temp) +} + // 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 temp = [] + for (let k = 1; k <= i; k++) { + const temp2 = [] + for (let j = 1; j <= k; j++) { + temp2.push(i) + } + temp.push(temp2) + } + deepOne.push(temp) +} + // 5. As 4, update array 'deepTwo' so that the result is: // [[[1]],[[1],[1,2]],...] +for (let i = 1; i <= 10; i++) { + const temp = [] + for (let k = 1; k <= i; k++) { + const temp2 = [] + for (let j = 1; j <= k; j++) { + temp2.push(j) + } + temp.push(temp2) + } + deepTwo.push(temp) +} + // 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 temp = [] + for (let k = 1; k <= i; k++) { + let sum = 0 + for (let j = 1; j <= k; j++) { + sum += j * j + } + temp.push([sum / k]) + } + deepThree.push(temp) +} + module.exports = { START, END, diff --git a/src/for-loop-and-arrays.js b/src/for-loop-and-arrays.js index 6635155..ad124eb 100644 --- a/src/for-loop-and-arrays.js +++ b/src/for-loop-and-arrays.js @@ -7,17 +7,36 @@ let word = '' // eslint-disable-line prefer-const // 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 = 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 = { a: sum, diff --git a/src/for-loop-basic.js b/src/for-loop-basic.js index dc3775a..e4d0b34 100644 --- a/src/for-loop-basic.js +++ b/src/for-loop-basic.js @@ -5,12 +5,28 @@ const countdown = [] // TODO: 1. Write a for loop that adds the numbers 0 to 3 to the numsZeroToThree array +for (let i = 0; i < 4; 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 < 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 += 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 > -1; i--) { + countdown.push(i) +} + // do not change below this line module.exports = { a: numsZeroToThree,