Filter an array of objects by key value into array

Question

I have a $scope variable that contains an array of objects.

$scope.arrayOfObjects = [{key:"ASS"}, 
{key:"CRT"},{key:"PRD"}]

And I have an array with this value

var arr = ["ASS", "CRT"]

I would update the array of objects with only the value of the keys into that are only in the array. How can do it?

$scope.arrayOfObjects = [{key:"ASS"},
{key:"CRT"}]

Community · Accepted Answer · 2020-06-20 09:12:55Z

1

Use array.map:

var arr = ["ASS", "CRT"];
var objArr = arr.map( _ => ({ key: _ }) );
console.log(objArr);

Or maybe

var arrayOfObjects =  [
   {key:"ASS"}, {key:"CRT"}, {key:"PRD"}
];
var arr = ["ASS", "CRT"];
var objArr = arr.map( _ => arrayOfObjects.find( _1 => _1.key == _ ) );
console.log(objArr);

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Jan 17, 2020 at 19:08

georgeawg

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2 Comments

Elias Over a year ago

I mean this is absolutely what I would do but why are you using _ as the variable name? This could be really confusing especially to some beginners. Is there any reason or just personal preference (tight code)?

georgeawg Over a year ago

In the Scala language underscore (_) is used regularly in specifying the parameter of a function literal. Other people commonly use it in JavaScript. It is a matter of personal preference and style.

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