how to use the findlastkey function from lodash in javascript

The findLastKey() function from Lodash library can be used to iterate over an object in reverse and return the key of the last element that matches the predicate function.

Here is an example of how to use findLastKey() function in JavaScript:

index.tsx
const _ = require('lodash');

const obj = {a: 1, b: 2, c: 3, d: 4};

const result = _.findLastKey(obj, (value, key) => {
  return value > 2 && key !== 'd';
});

console.log(result); // Output: 'c'
197 chars
10 lines

In the above example, we have first imported the lodash module and created an object obj. Then, we have called the findLastKey() function with obj and a predicate function that returns true for elements greater than 2 and keys not equal to 'd'.

The findLastKey() function has returned the key of the last element that matched the predicate function, which is 'c'.

Note that findLastKey() function works from right to left of the object, and returns the first key that satisfies the given function.