Articles about Quick help

What are Javascript classes and how to use them

What are javascript classes Classes are a fundamental concept in object-oriented programming, and they are used in many programming languages, but it wasn’t like this in Javascript. Until ECMAScript2015, known as ES6, classes didn’t exist in JS. In 2015 with the update classes were introduced as syntactic sugar for the existing prototype inheritance model. What classes bring is a more comfortable and more readable syntax for objects and inheritance.

6 min read

What is scikit learn – introduction to popular machine learning and data science Python library

Scikit-learn is one of the most widely-used Python packages for data science and machine learning. It enables you to perform many operations and provides a variety of algorithms. Scikit-learn also offers excellent documentation about its classes, methods, and functions, as well as the explanations on the background of used algorithms. Scikit-learn supports: data preprocessing, dimensionality reduction, model selection, regression, classification, cluster analysis. It also provides several datasets you can use to test your models.

9 min read

Essential knowledge about what are Javascript functions with examples

Function in programming is one of the most basic elements. It is a set of statements that perform some activity to get the result. In lots of cases, the action is performed using the data which are provided as input. The statements in the function are executed every time the function is invoked. Functions are used to avoid repeating the same code. The idea is to gather tasks that are executed more than ones into a function and then call the function wherever you want to run that code.

6 min read

Python list – definition and usage

Python has several collection data types — the types that might hold multiple data items at once. Lists are immutable and ordered Python sequence collections.To be more precise, the collections don’t store data items. They keep the references to them. You can have the references to the objects of different types (integers, floating-point numbers, complex numbers, Booleans, strings, other lists or tuples, sets or dictionaries, custom-defined types, and so on) in one list.

16 min read

How to Start with Machine Learning?

Machine learning is about using sample data to build mathematical models that enable computer systems to perform tasks without obtaining explicit instructions. Image recognition, self-driving vehicles, Internet search engines, computer vision, spam email filtering, and many other systems use machine learning. It’s also applied in financial forecasts, medical diagnostics, fraud detection, and so on. Machine learning is a vast and promising area. It offers exciting solutions to real-world problems as well as a variety of well-paid jobs.

6 min read

Object-oriented programming in Python

Python allows writing programs following several programming paradigms (like procedural programming, functional programming, object-oriented programming) and to combine them. Object-oriented programming is one of the most widely used paradigms today. It is based on the use of objects — entities that contain data members called attributes and bounded functions (routines, procedures) called methods. Objects are instances of classes. In other words, classes mostly define the structure of objects and serve as templates for creating them.

10 min read

5 reasons why you should learn Javascript

Javascript is one of the most popular programming languages in previous years, but lots of people still ask the question, why it’s worth to learn JS. Since a few years, Javascript spread so much that it’s visible almost everywhere, front-end, back-end and even mobile development and the popularity of this programming language is not getting smaller. There are tones of different frameworks which grown on Javascript basics and are used almost in every project which needs any user interface.

5 min read

Loops in Python – comparison and performance

Python is one of the most popular programming languages today. It’s an interpreted and high-level language with elegant and readable syntax. However, Python is generally significantly slower than Java, C#, and especially C, C++, or Fortran. Sometimes performance issues and bottlenecks might seriously affect the usability of applications. Fortunately, in most cases, there are solutions to improve the performance of Python programs. There are choices developers can take to improve the speed of their code.

8 min read

13 useful JavaScript array tips and tricks you should know

An array is one of the most common concepts of Javascript, which gives us a lot of possibilities to work with data stored inside. Taking into consideration that array is one of the most basic topics in Javascript which you learn about at the beginning of your programming path, in this article, I would like to show you a few tricks which you may not know about and which may be very helpful in coding!

6 min read

For loop, while loop, do…while loop and other JavaScript loops – comparison and performance

Loops play an essential role in software development, and they are used to iterate through the arrays or other elements that are iterable. In Javascript, we have a few different types of loops. It sometimes can be confusing which loop we should use in a particular case and which one will be the best in case of our performance. In this article, I’m going to compare the loops in Javascript, describe their pros and cons, test the speed of each of them.

7 min read