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Articles by AmitDiwan
Page 503 of 840
Converting a comma separated string to separate arrays within an object JavaScript
Suppose, we have a string like this −const str = 'dress/cotton/black, dress/leather/red, dress/fabric, houses/restaurant/small, houses/school/big, person/james';We are required to write a JavaScript function that takes in one such string. The function should then prepare an object of arrays like this −const output = { dress = ["cotton", "leather", "black", "red", "fabric"]; houses = ["restaurant", "school", "small", "big"]; person = ["james"]; };Exampleconst str = 'dress/cotton/black, dress/leather/red, dress/fabric, houses/restaurant/small, houses/school/big, person/james'; const buildObject = (str = '') => { const result = {}; const strArr = str.split(', '); strArr.forEach(el => { const values ...
Read MoreJavaScript Bubble sort for objects in an array
Suppose, we have a constructor class that creates Shoe objects like this −class Shoe { constructor(name, price, type) { this.name = name; this.price = price; this.type = type; } };We are using this class to fill an array with objects like this −const arr = [ new Shoe('Nike AirMax 90', '120', 'Casual'), new Shoe('Jordan Retro 1', '110', 'Casual'), new Shoe('Jadon Doc Martens', '250', 'Seasonal boots'), new Shoe('Adidas X Ghosted', '110', 'Athletic'), new Shoe('Nike Vapourmax Flyknit', '250', 'Casual'), new Shoe('Aldo Loafers', '130', 'Formal'), ...
Read MoreFlatten array to 1 line in JavaScript
Suppose, we have a nested array of numbers like this −const arr = [ [ 0, 0, 0, −8.5, 28, 8.5 ], [ 1, 1, −3, 0, 3, 12 ], [ 2, 2, −0.5, 0, 0.5, 5.3 ] ];We are required to write a JavaScript function that takes in one such nested array of numbers. The function should combine all the numbers in the nested array to form a single string.In the resulting string, the adjacent numbers should be separated by a whitespaces and elements of two adjacent arrays should be separated by a comma.ExampleThe code for ...
Read MoreFlat array of objects to tree in JavaScript
Suppose, we have an array of objects like this −const arr = [ { id: '1', name: 'name 1', parentId: null }, { id: '2', name: 'name 2', parentId: null }, { id: '2_1', name: 'name 2_1', parentId: '2' }, { id: '2_2', name: 'name 2_2', parentId: '2' }, { id: '3', name: 'name 3', parentId: null }, { id: '4', name: 'name 4', parentId: null }, { id: '5', name: 'name 5', parentId: null }, { id: '6', name: 'name 6', parentId: null }, { id: '7', name: 'name 7', ...
Read MorePartition N where the count of parts and each part are a power of 2, and part size and count are restricted in JavaScript
We are required to write a JavaScript function that takes in a number. The function should divide the number into chunks according to the following rules −The number of chunks should be a power−of−two, Each chunk should also have a power-of-two number of items (where size goes up to a max power of two, so 1, 2, 4, 8, 16, 32, 32 being the max)Therefore, for example, 8 could be divided into 1 bucket −[8]9 could be −[8, 1]That works because both numbers are powers of two, and the size of the array is 2 (also a power of two).Let's ...
Read MoreCheck how many objects are in the array with the same key in JavaScript
Suppose, we have an array of objects containing some data about some users like this −const arr = [ { "name":"aaa", "id":"2100", "designation":"developer" }, { "name":"bbb", "id":"8888", "designation":"team lead" }, { "name":"ccc", "id":"6745", "designation":"manager" }, { "name":"aaa", "id":"9899", "designation":"sw" } ];We are required to write a JavaScript function that takes in one such array. Then our ...
Read MoreRegroup JSON array in JavaScript
Suppose, we have a JSON array of objects like this −const arr = [ { "id": "03868185", "month_10": 6, }, { "id": "03870584", "month_6": 2, }, { "id": "03870584", "month_7": 5, }, { "id": "51295", "month_1": 1, }, { "id": "51295", "month_10": 1, }, { "id": "55468", "month_11": 1, } ];Here, we ...
Read MoreMerge two sorted arrays to form a resultant sorted array in JavaScript
We are required to write a JavaScript function that takes in two sorted array of numbers. The function should merge the two arrays together to form a resultant sorted array and return that array.For example −If the two arrays are −const arr1 = [2, 6, 6, 8, 9]; const arr2 = [1, 4, 5, 7];Then the output array should be −const output = [1, 2, 4, 6, 6, 7, 8, 9];ExampleThe code for this will be −const arr1 = [2, 6, 6, 8, 9]; const arr2 = [1, 4, 5, 7]; const mergeSortedArrays = (arr1 = [], arr2 = []) ...
Read MoreHow to merge two arrays with objects in one in JavaScript?
Suppose, we have two arrays of objects like these −const arr1 = [ {name:'test', lastname: 'test', gender:'f'}, {name:'test1', lastname: 'test1', gender:'f'}, {name:'test2', lastname: 'test2', gender:'m'} ]; const arr2 = [ {name:'test21', lastname: 'test21', gender:'f'}, {name:'test1', lastname: 'test1', gender:'f'}, {name:'test2', lastname: 'test2', gender:'m'}, {name:'test22', lastname: 'test22', gender:'m'} ];These arrays do not have any repeating objects within (repeating on the basis of 'name' property) but there exist some objects with repeating names in the first and second objects.We are required to write a JavaScript function that takes two such arrays and returns a new array.The ...
Read MoreGenerating a random number that is divisible by n in JavaScript
We are required to write a JavaScript function that takes in a number as the only argument. The function should then return a random generated number which is always divisible by the number provided by the argument.ExampleThe code for this will be −const num = 21; // function that generates random numbers divisible by n with a default upper limit of 1000000 const specialRandom = (num = 1, limit = 1000000) => { // getting a random number const random = Math.random() * limit; // rounding it off to be divisible by num const res = ...
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