The _.splitAt() method takes an array and a numeric index and returns a new array containing two arrays made by splitting the original array at provided numeric index.
Syntax:
_.splitAt(array, numeric_index)
Parameters:
- array: The array to be split.
- numeric_index: The index at which array is to be split.
Return Value: This method returns a newly created array containing two arrays.
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 split an array using this method at index 3.
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib'); // Array var array = [1, 3, 6, 8, 9, 11, 3]; // Value var value = 3; // Generating Array using splitAt() method var arr =_.splitAt(array, value); console.log("Array : ", array); console.log("Numeric Value : ", value); console.log("Generated Array : ", arr); |
Output:
Array : [ 1, 3, 6, 8, 9, 11, 3 ] Numeric Value : 3 Generated Array : [ [ 1, 3, 6 ], [ 8, 9, 11, 3 ] ]
Example 2: In this example, we will split an array using this method at index 0, so will get an empty and one same as the original array.
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib'); // Array var array = [1, 3, 6, 8, 9, 11, 3]; // Value var value = 0; // Generating Array using splitAt() method var arr =_.splitAt(array, value); console.log("Array : ", array); console.log("Numeric Value : ", value); console.log("Generated Array : ", arr); |
Output:
Array : [ 1, 3, 6, 8, 9, 11, 3 ] Numeric Value : 0 Generated Array : [ [], [ 1, 3, 6, 8, 9, 11, 3 ] ]
Example 3: This method is safe for indexes outside ranges.
Javascript
// Defining underscore contrib variable var _ = require('underscore-contrib'); // Array var array = [1, 3, 6, 8, 9, 11, 3]; // Value var value = 20; // Generating Array using splitAt() method var arr =_.splitAt(array, value); console.log("Array : ", array); console.log("Numeric Value : ", value); console.log("Generated Array : ", arr); |
Output:
Array : [ 1, 3, 6, 8, 9, 11, 3 ] Numeric Value : 20 Generated Array : [ [ 1, 3, 6, 8, 9, 11, 3 ], [] ]
