The built-in array function filter will help you filter out the unwanted elements from the array and return a new array consisting only of suitable items. To work correctly, the filter function accepts a parameter called “filtering function” or “filtering predicate”....
Iterating over the elements of the array in JavaScript is a very common task. In this tutorial you’ll learn how to use the built-in array function forEach to go over all array elements....
The --save option for npm install or npm i allows you to add the npm module you’re installing to the file package.json. This way it’ll become one of the project dependencies and will be automatically installed the next time you run npm install....
Node package manager supports semantic versioning. To take full advantage of it, you can use the symbols tilde(~) or caret(^). Tilde(~) means approximately equivalent to version. "moment": "~2.29.1" In this example npm install will pick up the latest release of the module moment starting from 2....
When I started learning JS, one of the most powerful tools I discovered, was the ability to check if a variable is empty. My definition of emptiness was hardly a scientific one as I didn’t mean to check if it was defined or not....
Similarly to generating a random float number within the specific range, you can write a function to get a random integer with a range. function getRandomIntegerInRange(min, max) { return Math.floor(Math.random() * (Math....
To add a new value to the beginning of the JS array, you can use the function Array.unshift. Here’s how it works. ...
Loose equality in JS in a powerful tool that allows you to loosely compare different values. If the types of the values don’t match, JavaScript will do a typecast (most often to a string type) and then do the comparison....
Nothing can be simpler than comparing two numbers. However, there are some details that you need to know about comparing numbers in JS. ...
In JavaScript, there are 2 different zeros. A regular 0 is a bit different from -0 in JS. ...