Lazar Ristic

Articles: 22

Joined: Apr 23, 2021

Recently published

Article

Validate Email Addresses with Regular Expressions in JavaScript

For web developers, validating user inputs in various types of forms is of crucial importance. Since that is the starting point of data being sent between the client and the server, you need to make sure that everything starts off on the right foot - lest you end up with...

Lazar Ristic

Oct 14, 2021

Article

Rounding Numbers in JavaScript using ceil(), floor() and round()

In this article, we'll be taking a look at how to round a number to an integer (whole number) in JavaScript. JavaScript provides three different methods to achieve this goal: the round() method, the ceil() method and the floor() method. All of these are static methods of the Math object....

Lazar Ristic

Oct 13, 2021

Article

Scikit-Learn's train_test_split() - Training, Testing and Validation Sets

Scikit-Learn is one of the most widely-used Machine Learning library in Python. It's optimized and efficient - and its high-level API is simple and easy to use. Scikit-Learn has a plethora of convenience tools and methods that make preprocessing, evaluating and other painstaking processes as easy as calling a single...

Lazar Ristic

Oct 12, 2021

Article

Guide to Python's keyboard Module

Python is one of the most suitable languages for automating tasks. Whether it's repeatable (ethical) web scraping after some time period, starting some programs on a computer start up, or automating sending mundane e-mails, Python has a lot of modules that make your life easier. One of these is a...

Lazar Ristic

Sep 20, 2021

Article

Working with JavaScript's Built-In Array Functions

When working with any programming language, you'll probably need some functionality that is not integrated into that language natively. Thus, you'll either implement them yourself, or turn to using various modules or libraries. This directly affects the efficiency of your application (more memory usage, more HTTP requests, etc.). To avoid...

Lazar Ristic

Sep 10, 2021

Article

Working with JavaScript's Built-In String Functions

Lazar Ristic

Sep 09, 2021

Article

Getting Started with Collections in JavaScript

Groups of data in different forms are one of the fundemental data structures in most programming languages. In many cases, groups of data expressed through different data types are referred to as Collections. In this guide - we'll take a look at Collections in JavaScript and when to use which...

Lazar Ristic

Aug 12, 2021

Article

Guide to Regular Expressions and Matching Strings in JavaScript

Matching strings or string patterns can be a real struggle. In the most common cases, you'll need these to validate e-mails, user inputs, file names, or most kinds of input strings. While there are many pattern-matching libraries and approoaches - a time-tested approach is using Regular Expressions to define a...

Lazar Ristic

Aug 10, 2021

Article

Null Coalescing Operator in JavaScript with ECMAScript 2020

When working in a request-response lifecycle, you want to make sure that a response with the wanted body - or at least an informative response arrives so the client that requested the data stays in the loop. In case of null values, you'll probably want to return a different result....

Lazar Ristic

Aug 03, 2021