Lodash _.sortedLastIndexOf() Method

The _.sortedLastIndexOf method is used to return the highest index of the array where an element can be inserted and maintain its sorted order. Also this method is like _.lastIndexOf except that it performs a binary search on a sorted array.
Syntax:

_.sortedLastIndexOf(array, value)

Parameters: This method accepts two parameters as mentioned above and described below:

• array: This parameter holds the array to inspect.
• value: This parameter holds the value to search for.

Return Value: It returns the index of the matched value, else -1.
Example 1: Here, const _ = require(‘lodash’) is used to import the lodash library into the file.

javascript

// Requiring the lodash library
const _ = require("lodash");

// Original array
let y = [4, 5, 7, 7, 7]

// Use of _.sortedLastIndexOf()
// method
let index = _.sortedLastIndexOf(y, 7);

// Printing the output
console.log(index);

Output:

4

Example 2:

javascript

// Requiring the lodash library
const _ = require("lodash");

// Original array
let y = ['p', 'q', 'r', 't', 't', 'u', 's', 't' ]

// Use of _.sortedLastIndexOf()
// method
let index = _.sortedLastIndexOf(y, 't');

// Printing the output
console.log(index);

Output:

7