When working with objects, we may need to check if a certain key exists or has a certain value. Let’s say we have a dog object: And we want to validate whether or n…

Knowing how to check for duplicates in an array can be useful in many different situations. Here are two ways to accomplish this: Combination of some() and indexOf(…

Let's go over a few ways to combine arrays in Javascript! Concatenate We have two arrays, an array of numbers and an array of colors. We can use [].concat syntax to…

As developers, we frequently find ourselves needing to perform certain asynchronous tasks. What if we want to do this in a loop? Let's dive into a few examples of c…