Lodash _.splitAt() Method
The Lodash _.splitAt() method takes an array and a numeric index and returns a new array containing two embedded arrays made by splitting the original array at the provided numeric index.
Syntax:
_.splitAt(array, numeric_index)
Parameters: This method takes two parameters as mentioned above and described below:
- 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 lodash contrib library to be installed. lodash contrib library can be installed using npm install lodash-contrib –save.
Example 1: In this example, we will split an array using this method at the 4th index.
Javascript
// Defining lodash contrib variable var _ = require( 'lodash-contrib' ); // Array var array = [1, 3, 6, 8, 9, 11, 3]; // Value var value = 4; // 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 : 4 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 one empty and the other same as the original array.
Javascript
// Defining lodash contrib variable var _ = require( 'lodash-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 lodash contrib variable var _ = require( 'lodash-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 ], [] ]
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