I am trying to binding dynamic checkboxes on FormArray, when I reproduce  on stackblitz its work, but show me error on my IDE, and I am using Array.prototype.map not the rxjs map and I got error in console.log:     core.js:9110 ERROR TypeError: this....
I have an array which contains objects. I am creating a map of this array to renders the names with a span component.  let data = [{"id": "01", "name": "Hi"}, {"id": "02", "name": "Hello"...
Given the following array of member data, I'm to return an array of memberID's for members whose membership status not current.  Here's the member data:    var members = [   {     firstName: 'Howard',     lastName: 'Lee',...
I'm about two weeks into studying React and working on my first SPA.  I'm loving react and able to figure out many of my problems but I've run into two problems on this MusicPlayer component I'm making.  One is that when I change src...
So I have an array of objects :  var arr = [     {name: 'John', cars: '2', railcard: 'yes', preferences: ['taxi', 'tram', 'walking']},     {name: 'Mary', cars: '0', railcard: 'no'...
There is an array of objects   const data = [{     "name": "08/20/2018",     "id": "name_1" }, {     "name": "12/23/2018",     "id": "name_2" }]   and I would like to map this array of o...
I have 2 arrays.  1) An array of ID's. ex. item_ids: [1, 4, 12]  2) An array of Objects   ex.   items: [   0: {id: 1...},   1: {id: 5...},   2: {id: 12...} ]   I need to build a NEW array that consists of objects from the second array, items whos...
I was working on a FreeCodeCamp algorithm problem where I was asked to title-case a given string, as in to make the first letter of every word capitalized. I managed to do so using this code:  function titleCase(str) {   var wordArr = str.split("...
New to javascript and trying to learn! I am trying to map through two array of objects, and if a certain property matches, pull in specific information into an array.   let result;  let arrNames = [{   name: "A" }, {   name: "B" }, {...
I am near the end of creating my application.   So it is for banks accounts where they ask you to give the first letter of your password, then for example fourth, etc.  I'm tired of counting on my own so I created this app.  But there is the last...

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