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Lodash _.sortedLastIndex() Method - GeeksforGeeks

Last Updated : 02 Sep, 2024

Lodash _.sortedLastIndex() method is used to return the highest index of the array where an element can be inserted and maintain its sorted order.

_.sortedLastIndex(array, value);

• array: This parameter holds the sorted array.
• value: This parameter holds the value to evaluate.

• This method returns the index at which the value should be inserted into the array.

Example 1: In this example, we are finding the index at which we can put the given value into the given array by the use of the lodash _.sortedLastIndex() method.

const _ = require('lodash');

let x = [1, 2, 3, 4, 4, 4, 5, 6, 6]
let index = _.sortedLastIndex(x, 4);

console.log(index);

Output:

6

Example 2: In this example, we are finding the index at which we can put the given value into the given array by the use of the lodash _.sortedLastIndex() method.

const _ = require('lodash');

let x = ['a', 'b', 'c', 'd', 'e', 'e', 'e', 'f']
let index = _.sortedLastIndex(x, 'e');

console.log(index);

Output:

7

Example 3: In this example, we are finding the index at which we can put the given value into the given array by the use of the lodash _.sortedLastIndex() method.

const _ = require('lodash');

let x = ['ajax', 'django', 'mongoDb',
    'react', 'reactnative', 'yarn']
let index = _.sortedLastIndex(x, 'ruby');

console.log(index);

Output:

5

Note: This will not work in normal JavaScript because it requires the library lodash to be installed.

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