how to use the sortedindex function from the underscore library in typescript

To use the sortedIndex function from the Underscore library in Typescript, you must first install the library using the following command:

index.ts
npm install underscore
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After that, you can import the _ object from the Underscore library in your Typescript file and use the sortedIndex function on arrays.

Here is an example:

index.ts
import * as _ from 'underscore';

const myArray: number[] = [10, 20, 30];

const index = _.sortedIndex(myArray, 25);

console.log(index); // Output: 2
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The sortedIndex function returns the index where the given value should be inserted into the sorted array to maintain its order. In the example above, 25 should be inserted at index 2 to maintain the sorted order of the array [10, 20, 25, 30].

Note that the sortedIndex function assumes that the array is already sorted. If it is not sorted, the result may be incorrect.