I've an array of objects with the following format [{'list': 'one', 'item': 1}, {'list': 'one', 'item': 2}, {'list': 'one', 'item': 3}, {'list': 'two', &...The following code: let myArray = Array.apply(null, {length: 10}).map(Number.call, Number); Creates the following Array: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] I just don't understand why. I can't find anything on the internet that explains th...I have [3, 16, 120]. when I do [3, 16, 120].map(mapper), I want to achieve, for example [4,5, 17,18, 121,122] i.e. each element map to n+1 and n+2. This is of course an example - what I want is to simply push multiple values from mapper function D...
Looking at the map function in JavaScript, what am I doing wrong here? // input: [{name: "Kevin"}, {name: "Bob"}]; // output: [{"Kevin" : 0}, {"Bob" : 1}]; var map = function(arr, property) { var i = 0;...What would be the equivalent of this without using a for loop? Unsure what array method to use function func(x){ var y = []; for(i=0;i<x.length;i++){ y.push(x[i]); y.push(x[i]); } return y; } var input = [1,2,3,4...I cannot load an image after calling map function: this.rosImgs.push({img: '../imgs/ros_eat.png', id: this.imgId}); getRosette(){ return this.rosImgs.map((obj) => <TouchableHighlight key={obj.id} onPress={() => this.imgCl...This is my Code. Where I want to Pass the Values of kvArray to Second Array. var kvArray = [{key: 1, value: 10}, {key: 2, value: 20}, {key: 3, value: 30}]; var reformattedArray = kvArray.map(obj => { var paylo...I have an object that contains an array and a couple of other values that I need to pass to the backend, but the backend needs to receive it as an array of objects. I fill in an array ($scope.student) by using checkboxes and the other values (docenti...
In my function I have the following variable: const updatedData = data.map(elements => { return {...elements, information: {programs: elements.programs.map(program => { return {...program, pids: program.pids.map(pid => { return...Using javascript functional programming methods (like map/reduce), how would one aggregate/count the status field of arr1 and transform it to an array of key/value objects in arr2. arr1 = [ {'task':'do something 1', 'status...©2020 All rights reserved.