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Author Archives: Andrej Buday
7 different ways how to get NumberFormatException in Java
This article will show you the NumberFormatException, how you are getting it and what you should do to handle the exception properly. Continue reading
How to figure out if a character in a string is a number
This article is about multiple ways to pull a character from a string and check if it is a number. Continue reading
Posted in Tips & tricks
Tagged char, Character, exceptions, Java, regex, regular expression, String
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Developer Notes 001
The list of a few developer notes collected during the software development which were not enough for a self-standing article. Continue reading
Posted in Tips & tricks
Tagged curl, Enum, interpunct, Jackson, Java 8, Lombok, NUMBER, Oracle DB, Postman, serialization, String, Switch
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How To Turn Number To String With Padded Space or Zeroes
Article about a simple solution to turning numbers into specific length String with padded space. Continue reading
Flattening Stream Collections in Java
This article is about flattening the list of element list with use of Java 8 stream feature flatMap and forEach Continue reading
What does the double star operator mean in Python?
In some Python code, you might spot double stars standing next to each other. What do those two stars mean, and what is their job? We will answer all the questions in this article. Continue reading
Posted in Language basics
Tagged **kwargs, double star, double-asterisk, method arguments, power operator, Python, Python functions, two stars
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Selenium – remove html element from the DOM
This article will show you how to remove elements from HTML DOM (Document Object Model) when using automated web-browser framework Selenium. Continue reading
Posted in Tutorials
Tagged drivers, finviz.com, Firefox, Java, Selenium, stocks, time-series, web-scrapper
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How to join List String elements with a comma
In this article, we will see three different ways to print string elements of the list into one coherent text. Continue reading
How to convert private key DER to PEM file type
In this article I will show you quick work around how to turn .pem
file type into the .der
file type on Windows. Continue reading
Create PostgreSQL database for integration testing with Docker
In this article, we will explore the idea of creating a PostgreSQL database Dockerfile. We can, for example, use it for creating integration tests in a separate CI/CD workflow. Continue reading
Posted in Solutions
Tagged CI/CD, Docker, Dockerfile, integration tests, IntelliJ, postgresql
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