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"...
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...
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 have 2 arrays   var array1 = ["1", "2", "3", "4", "5", "6"]   and  var array2 = [   { offId: "4", offname: "four" },   { offId: "9", offname: "nine" },   { offId: "...
Basically i have two arrays which i am using it for the configuration of buttons.  First array which defines how many buttons should be present and in order.  buttonGroups: [ 0, 2 ]   Another array of objects which says about the actual buttons....
I am trying to get an array of (distinct) keys from an array of objects.  arr =[    {id: 1, desc: "", name: "", objectives: Array(3), …},    {id: 2, desc: "", name: "", objectives: Array(3), …},    {id: 3, desc: &#...
I'm trying to create a new array of objects (usersData) using map() in order to add a new property assigned with a value from a secondary array (countries). During my tests I've noticed that my original array of objects (users) has been modif...

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