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Lodash _.sampleSize() Method - GeeksforGeeks

Last Updated : 03 Sep, 2024

Lodash's _.sampleSize() method returns an array of a specified number (n) of random, unique elements from a collection (array, object, or string). It ensures no duplicates and handles empty collections by returning an empty array.

_.sampleSize(array, n);

• array: This parameter holds the sample collection.
• n: This parameter holds the number of elements to sample.

This method returns an array of n random elements.

Example 1: In this example, we are printing the random elements of the given array in the console by the use of the lodash _.sampleSize() method.

const _ = require('lodash');

let x = [1, 2, 7, 10, 13, 15];
let result = _.sampleSize(x, 2);

console.log(result);

Output:

[10, 13]

Example 2: In this example, we are printing the random elements of the given array in the console by the use of the lodash _.sampleSize() method.

const _ = require('lodash');

let x = ['mango', 'apple', 'banana',
    'orange', 'grapes'];
let result = _.sampleSize(x, 3);

console.log(result);

Output:

[ 'grapes', 'orange', 'banana' ]

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

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