JavaScript for Beginners #52 The concat() Array Method
Here, we will learn about the concat method for arrays in JavaScript. This method allows us to merge two or more arrays together.
0:00 Introduction to concat
0:12 Setting up two arrays
0:36 Merging two arrays using concat
1:26 Reversing the order
1:46 Using concat() with an empty array [].concat()
2:42 Writing a function that merges arrays using concat()
5:10 Using the forEach method to loop through our new array
6:07 Copying an array using concat()
8:17 Merging two arrays of objects using concat()
9:43 Using the forEach method to loop through our new array
Last Example:
class Items {
constructor(item, price, stock) {
this.item = item;
this.price = price;
this.stock = stock;
}
description() {
return `${this.item} costs $${this.price}. We currently have ${this.stock} in our store.`;
}
}
const groceryItems = [
new Items("Bread", 3, 30),
new Items("Milk", 4, 50),
new Items("Steak", 5, 10),
new Items("Rice", 1, 100),
];
const generalItems = [
new Items("Broom", 10, 3),
new Items("Microwave", 50, 2),
new Items("TV", 1000, 1),
new Items("Paper", 2, 300),
];
JavaScript Playlist:
• JavaScript for Beginners
MDN concat() Method:
https://developer.mozilla.org/en-US/d...
MDN forEach() Method:
https://developer.mozilla.org/en-US/d...
MDN Classes:
https://developer.mozilla.org/en-US/d...
NodeJS:
nodejs.org
VS Code:
code.visualstudio.com
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