how to use the sortedlastindexby function from the lodash library in typescript

The sortedLastIndexBy function from the Lodash library allows you to find the index position to insert an element in a sorted array based on a computed value. Here is an example of how to use it in Typescript:

index.ts
import sortedLastIndexBy from 'lodash/sortedLastIndexBy';

interface Person {
  name: string;
  age: number;
}

const people: Person[] = [
  { name: 'John', age: 25 },
  { name: 'Jane', age: 30 },
  { name: 'Bob', age: 35 },
];

const index = sortedLastIndexBy(
  people,
  { name: 'Joel', age: 28 }, // the element to insert
  (person) => person.age // the computed value to sort by
);

console.log(index); // output: 2
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In this example, we import the sortedLastIndexBy function and define an array of Person objects. Then we call the sortedLastIndexBy function, passing in the array, the element to insert, and a function which computes the value to sort by (in this case, the age property). The sortedLastIndexBy function returns the index position at which to insert the element in the sorted array.

Note that because sortedLastIndexBy returns an index position rather than actually inserting the element into the array, you will need to use splice or other array functions to actually insert the element.