How to get first n elements of an object using lodash?

Question

I want to get the first n key/value pairs from an object (not an array) using lodash. I found this answer for underscore, which says to use use first (doesn\'

Answer 1

If you look at the loadash documentation for first. It only takes in an array as its argument, and this is probably not the API to use.

See: https://lodash.com/docs/3.10.1#first

Here is 1 method you can solve it using standard Javascript API.

The catch here is that you can use the Object.keys(...)[index] API to retrieve the element's key based on their position.

Then all you need to do is just loop n number of times and using the derived key push it into another object.

var firstN = 2;
var o={a:7, b:8, c:9};
var result = {};

for (var index=0; index < firstN; index++) {
  var key = Object.keys(o)[index];
  result[key] = o[key];
}

console.log(result);