Lodash map keys and values on an object

Question

My code:

const orig = {" a ":1, " b ":2}
let result = _.mapKeys(_.mapValues(orig, (v) => v + 1), (v, k) => k.trim())

actual and desired result = { "a": 2, "b": 3 }

But is there a better Lodashy way of doing this?

Answer 1

This solution uses _.transform(), and it's a bit shorter. I'm not sure that it's better than your functional solution.

const orig = {" a ": 1, " b ": 2 };

const result = _.transform(orig, (r, v, k) => {
  r[k.trim()] = v + 1; 
});

console.log(result);

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>

Without lodash I would use Object.entries() to extract the key and value, map them to the required forms, and then use Object.fromEntries() to convert back to an object:

const orig = {" a ": 1, " b ": 2 };

const result = Object.fromEntries(Object.entries(orig).map(([k, v]) => [k.trim(), v + 1]));

console.log(result);