Summary: this tutorial shows you how to use the JavaScript Array’s Show
JavaScript Array type provides a very powerful Deleting elements using JavaScript Array’s splice() methodTo delete elements in an array, you pass two arguments into the
The The Let’s take a look at the following example. Suppose, you have an array
The following statement deletes three elements of the
The
And the
The following figure illustrates the Inserting elements using JavaScript Array splice() methodYou can insert one or more elements into an array by
passing three or more arguments to the Consider the following syntax.
In this syntax:
Note
that the Assuming that you have an array named
The following statement inserts one element after the second element.
The
The following figure demonstrates the method call above. You can insert more than one element by passing the fourth argument, the fifth argument, and so on to the
Replacing elements using JavaScript Array splice() methodThe To do this, you pass at least three arguments with the second one that specifies the number of items to delete and the third one that indicates the elements to insert. Note that the number of elements to delete needs not to be the same as the number of elements to insert. Suppose you have an array of programming languages with four elements as follows:
The following statement replaces the second element by a new one.
The
The following figure illustrates the method call above. You
can replace one element with multiple elements by passing more arguments into the
The statement deletes one element from the second element i.e.,
In this tutorial, you have learned how to use the JavaScript Array
Was this tutorial helpful ? What does JavaScript splice return?The splice() method returns the removed item(s) in an array and slice() method returns the selected element(s) in an array, as a new array object. 2. The splice() method changes the original array and slice() method doesn't change the original array.
Is JavaScript splice destructive?The . splice() method is a destructive array method, which means it modifies the array on which it is called (disclaimer: destructive methods can be risky, especially if you use the array in question elsewhere in your program, so proceed with caution).
What is difference between slice and splice in JavaScript?Slice is used to get a new array from the original array whereas the splice is used to add/remove items in the original array. The changes are not reflected in the original array in the case of slice and in the splice, the changes are reflected in the original array.
How fast is splice JavaScript?Here's a good rule of thumb, based on tests done in Chrome, Safari and Firefox: Splicing a single value into the middle of an array is roughly half as fast as pushing/shifting a value to one end of the array.
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