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We have an array that contains various objects. A few objects on this array have a date field (which basically is returned as a string from the server, not a date object), while for others this field is null.The requirement is that we have to display objects without date at top, and those with date needs to be displayed after them sorted by date field.Also, for objects without date sorting needs to be done alphabetically.Exampleconst sorter = ((a, b) => { if (typeof a.date == 'undefined' && typeof b.date != 'undefined') { return -1; } ... Read More
Suppose, we have an array of objects like this −const arr = [ {"goods":"Wheat ", "from":"GHANA", "to":"AUSTRALIA"}, {"goods":"Wheat", "from":"USA", "to":"INDIA"}, {"goods":"Wheat", "from":"SINGAPORE", "to":"MALAYSIA"}, {"goods":"Wheat", "from":"USA", "to":"INDIA"}, ];We are required to write a JavaScript function that takes in one such array. The goal of function is to return an array of all such objects from the original array that have value "USA" for the "from" property of objects and value "INDIA" for the "to" property of objects.Exampleconst arr = [ {"goods":"Wheat ", "from":"GHANA", "to":"AUSTRALIA"}, {"goods":"Wheat", "from":"USA", "to":"INDIA"}, {"goods":"Wheat", "from":"SINGAPORE", "to":"MALAYSIA"}, {"goods":"Wheat", "from":"USA", "to":"INDIA"}, ... Read More
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 More
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 More
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 More
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 More
We are required to write a JavaScript function that calculates the nth root of a number and returns it.ExampleThe code for this will be −const findNthRoot = (m, n) => { try { let negate = n % 2 == 1 && m < 0; if(negate) m = −m; let possible = Math.pow(m, 1 / n); n = Math.pow(possible, n); if(Math.abs(m − n) < 1 && (m > 0 == n > 0)) return negate ? −possible : possible; } catch(e){ return null; } }; console.log(findNthRoot(45, 6));OutputAnd the output in the console will be −1.8859727740585395
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 More
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 More
Suppose, we have an array of two numbers that specify a range. We are required to write a function that finds the smallest common multiple of the provided parameters that can be evenly divided by both, as well as by all sequential numbers in the range between these parameters.The range will be an array of two numbers that will not necessarily be in numerical order.For example, if given [1, 3], then we are required to find the smallest common multiple of both 1 and 3 that is also evenly divisible by all numbers between 1 and 3. The answer here ... Read More