Advertisements So, I’m new to JS and currently taking courses. My instructor listed one solution, and the solution I came up with in my opinion is more ideal…I used push() method which I’d think is better. And I used Template literal inside my alert method to prevent the need to concat the string and variable….… Read More Use three prompt boxes to ask the user for three different words and then place them in an array. Use an alert box to display the array

Advertisements I’m trying to make an array of coordinate arrays, but I’m blanking out on how to doing. How do I make this happen? Code – targetLocations() { const data = [] const timer = setInterval(() => { for (let i = 0; i<store.state.location.locations.length; i++) { const coordinates = [store.state.location.locations[i]["longitude"]+","+store.state.location.locations[i]["latitude"]] data.push(coordinates) console.log("this is the data… Read More Can't make array of arrays

Advertisements I have this array of objects with months and status properties: const data = [ { "month": "Jan", "status": "Full" }, { "month": "Feb", "status": "Full" }, { "month": "Mar", "status": "Full" }, { "month": "Apr", "status": "Full" }, { "month": "May", "status": "Full" }, { "month": "Jun", "status": "Full" }, { "month": "Jul",… Read More JavaScript Identify Status For Months Starting Later

Advertisements This is beginner level. I am trying to create separate arrays for odd and even numbers from the parent array. Below the code: const arr = [22, 33, 44, 55, 66] let even = [] let odd = [] function separateArray(arr) { let j, k for( let i = 0; i < arr.length; i++… Read More Creating separate arrays for even and odd numbers

Advertisements I want to create an array of numbers which gives the square of those numbers; for example I tried this but it does not work: let arr = [1, 2, 30, 50, 7, 83, 670] let n = array.map((num)=>{ return num % num }) console.log(n) >Solution : I can see there is a small… Read More How to create an array of square of given numbers in javascript?

Advertisements let big_coordinates_arr =[ [1,2],[3,4],[5,8],[7,9]] ; let small_coordinates_arr=[ [3,4],[7,9] ] ; Exepected Output: [ [1,2],[5,8] ] Dear all, is there a way to filter an array of coordinates from an array of coordinates? There are codes similar to this from element of array at here, but I am unsure on filtering 2d-nested array. I will… Read More Filter Coordinate Array from Another Coordinate Array

Advertisements OK so I have 2 classes that are related to each other without the use of inheritance class1: public class Userformat { private String name; private int id; public Userformat(String name, int id){ this.name = name; this.id = id; } public String toString(){ return "\nname: "+ name + "\nID: " + id + "\nbooks… Read More How to detect If this class object is duplicated or not

Advertisements When I extract middle item from odd number of elements: var givenArray = [‘Maths’,’English’, ‘Social’, ‘Economics’,’Tech’] console.log(givenArray[((givenArray.length-1)/2)]) It provides output to be social which is what I am expecting but in case the number of items is even : var givenArray = [‘Maths’,’English’, ‘Social’, ‘Economics’] console.log(givenArray[((givenArray.length)/2)]) I get output Social. The actual question here… Read More How to extract the middle item or (Two Items in Middle) from an array regardless of Odd or Even Number of Items?

Advertisements I would like to get some advise through javascript cookies handling. I have these code for extracting values from cookies.However i understand all the way till .map from .reduce array method i have some doubt. Can any body tell me what is happening through these method. Especially in .reduce((arg,[key,val])=> ({…arg,[key.trim()]:decodeURIComponent(val)}), {}); this line.And also… Read More Array reduce explanation

Advertisements I’m using the below code to intersect 2 very large arrays. Is it possible to improve the performance of this as it takes such a long time as it currently stands. const arr1 = [ { “number”:”123″, “firstName”:”John”, “lastName”:”Smith”, “email”:”test1@test.com”, }, { “number”:”1234″, “firstName”:”Chad”, “lastName”:”Baker”, “email”:”test2@test.com”, } ]; const arr2 = [ { “number”:”12345″,… Read More Intersection of 2 arrays containing objects