Underscore.js _.splat() Method

The _.splat() method takes a function that accepts one or more arguments and hence returns a function that takes an array and uses its elements as the arguments to the original function.

Syntax:

_.splat( function );

Parameters:

• function: original function containing arguments.

Return Value: This method returns a function.

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

underscore.js contrib library can be installed using npm install underscore-contrib –save.

Example 1: In this example, we will see the use of the _.splat() method.

javascript

// Defining underscore contrib variable
const _ = require('underscore-contrib');

function addNum(a, b) {
    return a + b;
}

let listTwoNamesFromArray = _.splat(addNum);

console.log(listTwoNamesFromArray([1, 2]));

Output:

3

Example 2: In this example, we will see the use of the _.splat() method.

javascript

// Defining underscore contrib variable
const _ = require('underscore-contrib');

function addNum(a, b) {
    return a + " : " + b;
}

let listTwoNamesFromArray = _.splat(addNum);

console.log(listTwoNamesFromArray(
    ["GeeksforGeeks", "Computer Science Portal for Geeks"]));

Output:

GeeksforGeeks : Computer Science Portal for Geeks