let numbers = Ĭonsole.log(numbers) // Output: This method is particularly useful when you need to keep track of the element that was removed. It removes the last element from an array and returns the element that was removed. pop() method is a simple and straightforward way to remove the last element from an array in JavaScript. In this tutorial, you have learned how to use the JavaScript Array splice() method to delete existing elements, insert new elements, and replace elements in an array.The. console.log(languages) // Code language: JavaScript ( javascript ) The statement deletes one element from the second element i.e., Java and inserts three new elements into the languages array. You can replace one element with multiple elements by passing more arguments into the splice() method as follows: languages.splice( 2, 1, 'C#', 'Swift', 'Go') Code language: JavaScript ( javascript ) The following figure illustrates the method call above. Code language: JavaScript ( javascript ) The languages array now still has four elements with the new second argument is 'Python' instead of 'C++'. languages.splice( 1, 1, 'Python') Code language: JavaScript ( javascript ) The following statement replaces the second element by a new one. Suppose you have an array of programming languages with four elements as follows: let languages = Code language: JavaScript ( javascript ) Note that the number of elements to delete needs not to be the same as the number of elements to insert. 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. The splice() method allows you to insert new elements into an array while deleting existing elements simultaneously. Code language: JavaScript ( javascript ) Replacing elements using JavaScript Array splice() method You can insert more than one element by passing the fourth argument, the fifth argument, and so on to the splice() method as in the following example. The following figure demonstrates the method call above. console.log(colors) // Code language: JavaScript ( javascript ) The colors array now has four elements with the new element inserted in the second position. colors.splice( 2, 0, 'purple') Code language: JavaScript ( javascript ) The following statement inserts one element after the second element. let colors = Code language: JavaScript ( javascript ) Also, the splice() method does not remove any elements, therefore, it returns an empty array. For example:Īssuming that you have an array named colors with three strings. Note that the splice() method actually changes the original array. The third argument, fourth argument, and so on are the new elements that are inserted into the array.The second argument is zero (0) that instructs the splice() method to not delete any array elements.
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