Convert Object array to String Array

Question

I have an Object array that looks like the following:

var array = [
 {'id':1,'description':test},
 {'id':2,'description':test},
 {'id':3,'description':test}
]

And I want to convert it to look like this:

var newArray = [
 1, 2, 3
]

So it's basically taking the object array, extracting the id's out of the objects, and creating a new array that contains the id's that were extracted. Is there a way to do this in one line? Even better if a new array doesn't have to get created and array is just updated.

Answer 1

var test ="sai";
var array = [
 {'id':1,'description':test},
 {'id':2,'description':test},
 {'id':3,'description':test}
]
console.log(array.map(function(obj){return obj.id}))

Answer 2

iterate the array using foreach and populate newArray

var newArray = [];
array.forEach(funtion(element){
 newArray.push(element.id);
});
console.log( newArray );

Answer 3

array.map(function (item) { 
 return item["id"];
}

If you'd like to have anew instance of the mapped array:

var newarray = [];
array.forEach(function (item) {
 newarray.push(item["id"]);
}

Answer 4

array.map(function(element) {return element.id})

OP Requirement: better if array is just updated

array = array.map(function(element) {return element.id})

• Harpreet Singh: @TaoP.R.O.P asked for it