splice()  Array  instance method JS Home  <<  JS Reference  <<  Array  <<  splice()

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Description

Adds and/or removes elements from within an array.

Syntax

Parameters

Examples

The code below creates an array then adds and removes elements as per the comments.

// Create an array with four elements.
var weekDays = ['Mon', 'Tues', 'Wed', 'Thurs'];

/*
 Remove element 2 and 3 from the array using the splice() method. The first 
 number within the brackets is the starting index to delete from, remember
 indexing starts from 0. The second number is number of elements to delete.
 */
weekDays.splice(1,2);
alert(weekDays); // Array now holds ['Mon', 'Thurs'].

// Add two elements starting from index 1 splice() method. 
weekDays.splice(1,0,'Sat','Sun');
alert(weekDays); // Array now ['Mon', 'Sat', 'Sun', 'Thurs'].

/*
 Remove element 2 and 3 from the array and replace with new values using the 
 splice() method.
 */
weekDays.splice(1,2,'Tues','Wed');
alert(weekDays); // Array is ['Mon', 'Tues', 'Wed', 'Thurs'].

/*
 Only first parameter entered so all elements after index removed using the 
 splice() method.
 */
weekDays.splice(1);
alert(weekDays); // Array is ['Mon'].

Related Tutorials

JavaScript Intermediate Tutorials - Lesson 1 - Arrays

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