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Android extract array of properties of array of objects

By : Jim C
Date : October 18 2020, 06:10 AM
seems to work fine Probably the cleanest way to do it is to use Streams. Something like this:
code :
List<String> listOfP2= listOfObjects.stream().map(x->x.getP2()).collect(Collectors.toList());

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How to extract 2 properties from an array of objects as an observabe?

By : Sebastian Vallejo
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further You may use map operator from RxJS first, then use map from Array, as follows:
code :
// first use the map operator from RxJS    
    // then use Array.prototype.map
        x.map(return {longiture:x.longitude, latitude:x.latitude})
           x.map(return {longiture:x.longitude, latitude:x.latitude})

javascript extract certain properties from all objects in array

By : 김동훈
Date : March 29 2020, 07:55 AM
I wish this helpful for you Use object destructuring to get the properties, and generate a new object using shorthand property names:
code :
const dummyArray = [{ "att20": "att20", "att30": "att30", "att70": "att70", "att80": "att80"}, { "att20": "att20", "att30": "att30", "att70": "att70", "att80": "att80"}];

const result = dummyArray.map(({ att20, att30, att70, att80 }) => ({


Extract these properties from an array of Objects

By : user2065118
Date : March 29 2020, 07:55 AM
hop of those help? You could map the wanted keys of the object and generate a new object by mapping the array.
code :
function getSubset(array, keys) {
    return array.map(o => Object.assign(...keys.map(k => ({ [k]: o[k] }))));

var objArr = [{ name: "name", description: "description", date: "date" }, { name: "name", description: "description", date: "date" }, { name: "name", description: "description", date: "date" }];

console.log(getSubset(objArr, ['name', 'description']));

From an array of objects, extract value of properties for each object and put in a different array

By : user2132003
Date : March 29 2020, 07:55 AM
I wish did fix the issue. I have a group of filters that is an Reactive Forms Object. I’ve taken the property values of the object and pushed it into an array. , According to your desired result, I think you can use ES6 functions.
code :
const result = yourTable.map(element => Object.values(element));

From an array of objects, extract value of two properties into an array

By : Erkan Kuş
Date : March 29 2020, 07:55 AM
this one helps. This should work - if your elements don't have a foo or anotherfoo they'll come out as undefined
code :
objArray = [{
  foo: 1,
  bar: 2,
  anotherfoo: 5
}, {
  foo: 3,
  bar: 4,
  anotherfoo: 8

function myfunction(arr) {
  return arr.map(function(e) {
    return {
      foo: e.foo,
      anotherfoo: e.anotherfoo

newArray = myfunction(objArray);

// newArray is [{foo:1, anotherfoo:5},{foo:3, anotherfoo:8}]
function myfunction2(arr) {
  return arr.map(({foo, anotherfoo}) => 
                 ({foo, anotherfoo}));
function myfunction(arr) {
  return arr.map(function(e) {
    var newfoo;
    if(e.foo==="something") {newfoo = anotherfoo+1;} else{newfoo = anotherfoo-1;}
    return {
      foo: e.foo,
      anotherfoo: newfoo
function myfunction2(arr) {
  return arr.map(({foo, anotherfoo}) => {
                   if(foo==="something") {anotherfoo+=1} else{anotherfoo -=1};
                   return {foo, anotherfoo}});
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