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Found 9326 Articles for Object Oriented Programming
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
406 Views
Suppose, we have two different array of objects that contains information about the questions answered by some people −const arr1=[ { PersonalID: '11', qusetionNumber: '1', value: 'Something' }, { PersonalID: '12', qusetionNumber: '2', value: 'whatever' }, { PersonalID: '13', qusetionNumber: '3', value: 'anything' }, { PersonalID: '14', qusetionNumber: '4', value: 'null' } ]; const arr2=[ { qusetionNumber: '2', chID: '111', cValue: 'red' }, { qusetionNumber: '2', chID: '112', cValue: 'green'}, { qusetionNumber: '2', chID: '113', cValue: 'blue' }, {qusetionNumber: '3', choiceID: '114', cValue: 'yellow'}, {qusetionNumber: '4', choiceID: '115', cValue: 'red'} ];We ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
311 Views
We are required to write a JavaScript function that takes in a multidimensional array of arrays of literal values. Our function should return the intersecting array of all the subarrays present in the input array.ExampleThe code for this will be −const arr = [ ["garden","canons","philips","universal"], ["universal","ola","uber","bangalore"] ]; const findMultiIntersection = (arr = []) => { const res = []; arr.forEach(el => { const thisObj = this; el.forEach(element => { if(!thisObj[element]){ thisObj[element] = true; } else{ res.push(element) }; }); }, {}); return res; }; console.log(findMultiIntersection(arr));OutputAnd the output in the console will be −[ 'universal' ]
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
388 Views
Suppose we have two arrays of literals like these −const arr1= ['a', 'b', 'c']; const arr2= ['d', 'e', 'f'];We are required to write a JavaScript function that takes in two such arrays and build all possible combinations from the arrays.So, for these two arrays, the output should look like −const output = [ad, ae, af, bd, be, bf, cd, ce, cf];ExampleThe code for this will be −const arr1= ['a', 'b', 'c']; const arr2= ['d', 'e', 'f']; const combineArrays = (...arr) => { const res = []; const combinePart = (part, index) => { arr[index].forEach(el => ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
596 Views
Suppose, we have an array that contains dates in MM-YYYY format like this −const arr = ["1-2016", "7-2015", "7-2016", "3-2016", "8-2016", "2-2016", "6-2016", "8-2015", "5-2016", "4-2016", "9-2015", "10-2015", "11-2015", "12-2015"];We are required to write a JavaScript function that takes in one such array and sorts it such that the dates in the array are arranged in oldest to newest order.ExampleThe code for this will be −const arr = ["1-2016", "7-2015", "7-2016", "3-2016", "8-2016", "2-2016", "6-2016", "8-2015", "5-2016", "4-2016", "9-2015", "10-2015", "11-2015", "12-2015"]; const padToString = (num) => { return String("0" + num).slice(-2); }; const sortByDate = (first, second) => ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
226 Views
We are required to write a JavaScript function that takes in an array of literals and finds the most frequent number in the array and how many times it is repeated.ExampleThe code for this will be −const arr = ['13', '4', '1', '1', '4', '2', '3', '4', '4', '1', '2', '4', '9', '3']; const findFrequency = (arr = []) => { const count = {}; const max = arr.reduce((acc, val, ind) => { count[val] = (count[val] || 0) + 1; if (!ind || count[val] > count[acc[0]]) { return ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
61 Views
We are required to write a JavaScript function that determines how many different ways we can remove a group of values from a sequence, leaving the original sequence in order (stable), and making sure to remove only one instance value each from the original sequence.For example − If the sequence array is −const arr = [1, 2, 1, 3, 1, 4, 4];And the array to be removed is −const arr2 = [1, 4, 4];Then there are three possible ways of doing this without disrupting the order of elements −1 --> [2, 1, 3, 1] 2 --> [1, 2, 3, 1] ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
847 Views
Suppose, we have an array of objects like this −const arr = [{ 'title': 'Hey', 'foo': 2, 'bar': 3 }, { 'title': 'Sup', 'foo': 3, 'bar': 4 }, { 'title': 'Remove', 'foo': 3, 'bar': 4 }];We are required to write a JavaScript function that takes in one such array as the first input and an array of string literals as the second input.Our function should then prepare a new array that contains all those objects whose title property is partially or fully included in the second input array of literals.ExampleThe code for ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
608 Views
Suppose, we have an array string that contains some duplicate entries like this −const arr = ['California', 'Texas', 'Texas', 'Texas', 'New York', 'Missouri', 'New Mexico', 'California'];We are required to write a JavaScript function that takes in one such array. Our function should then construct an array of objects that contains an object for each unique entry and a property "count" that contains its count in the original array.Therefore, the final output for the above array should look something like this −const output = [ {'name':'California', 'count':2}, {'name':'Texas', 'count':3}, {'name':'New York', 'count':1}, {'name':'Missouri', 'count':1}, {'name':'New Mexico', ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
292 Views
Suppose, we have one array of strings and another array of objects like this −const arr1 = [ '1956888670', '2109171907', '298845084' ]; const arr2 = [ { KEY: '1262875245', VALUE: 'Vijay Kumar Verma' }, { KEY: '1956888670', VALUE: 'Sivakesava Nallam' }, { KEY: '2109171907', VALUE: 'udm analyst' }, { KEY: '298845084', VALUE: 'Mukesh Nagora' }, { KEY: '2007285563', VALUE: 'Yang Liu' }, { KEY: '1976156380', VALUE: 'Imtiaz Zafar' }, ];We are required to write a JavaScript function that takes in two such arrays. Then our function should return a filtered version of the second ... Read More
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
835 Views
Suppose we have a short JSON object like this −const obj = {"name":"sam", "age":"24", "isMarried":"false"};Here, some of the Number and Boolean values, by mistake, have been coerced to String.Like the age property which was a Number and isMarried property which was a boolean. Our job is to write a function that takes in one such object and correctly changes these incorrect data types with the correct ones.ExampleThe code for this will be −const obj = { "name":"sam", "age":"24", "isMarried":"false" }; const convertToOriginal = (obj = {}) => { const keys = Object.keys(obj); for(let i = ... Read More