I'm trying to convert this
[ { "_id": "57760ecef5e7478c1e46b892" },
{ "_id": "57760f56f5e7478c1e46b896" },
{ "_id": "57760f7df5e7478c1e46b89a" } ]
to this
"_id" : [ "57760ecef5e7478c1e46b892", "57760f56f5e7478c1e46b896", "57760f7df5e7478c1e46b89a" ]
through code.
I am relatively new to the world of node.js so I don't know what to search for.
You can use the arrow functions of ES6 to do that in a very concise way:
var obj = {_id: yourArray.map((item) => item._id)}
See Arrow functions and map() for details.
var arrr = [{
"_id": "57760ecef5e7478c1e46b892"
}, {
"_id": "57760f56f5e7478c1e46b896"
}, {
"_id": "57760f7df5e7478c1e46b89a"
}]
var newObj = {
"_id": arrr.map(function(elem) {
return elem["_id"];
})
};
console.log(newObj);