Arrays Arrays allow us to store multiple elements in the same variable. We can store numbers, strings, booleans, arrays, objects, and more. These can be mixed within the same array. Naming arrays in the plural form will be useful when we need to iterate over them. We can * use the
Variables let can be reassigned later on. let sum = 0; sum += 1; // or let language = "C++"; language = "JavaScript"; const cannot be reassigned. We can still change elements inside an array or object. let or const Jad encourages always starting with const. If we need to reassign
Numbers we can use underscore (_) as a numeric separator to make it easier to read. let nb = 1_000_000; // equivalent to 1000000 // 10_00 or 1_000 are equivalent to 1000 Converting from number to string Though rarely used, we can do it by calling .toString() method. Documentation on
Still with strings today. Character Access We can access a specific character in a string by using square brackets like this: string[0]; We get the first character. Combining it with Length Use the length property to get the last character, i.e., const language = "JavaScript"; language[language.
Intro I'm learning through this course by Jad Joubran. Before starting over, I've finished 58 out of 83 lessons but hardly remember anything. Let's dive into this again! This course teaches JavaScript in the context of building web applications. Prerequisites for this course are:
There were so many times I wanted to master JavaScript because I wanted to become a proper web designer. I’ve built many websites with jQuery or JavaScript already, but the way I did them isn’t something I’m proud of. Before the AI era, I just copied someone