JavaScript: Adding and Removing Elements on Arrays
JavaScript Array Methods – Push, Pop, Shift & Unshift Explained with Examples
In this JavaScript tutorial, we explore essential array operations beyond simply declaring and accessing elements. You’ll learn how to:
Add elements to the end of an array using .push()
Remove the last element from an array using .pop()
Add elements to the beginning of an array using .unshift()
Remove the first element from an array using .shift()
Understand how array indexing works (zero-based)
Use the .length property to find the size of an array
See how arrays in JavaScript are actually special types of objects
We’ll walk through practical code examples using an insectArray and a books array, showing how each method changes the array’s length and content. This is perfect for JavaScript beginners and anyone learning core data structure manipulation techniques.
Timestamps:
0:00 Intro to additional array operations
0:14 Accessing and modifying array elements
0:27 Using .length to get array size
0:50 Arrays as special objects in JavaScript
1:01 Adding elements with .push()
1:50 Removing elements with .pop()
2:53 Adding elements to the start with .unshift()
3:38 Removing elements from the start with .shift()
4:26 Summary of changes and final array state
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