Article competition on JavaRush. Digest #2: October 9-12

Hi all! The second week of the JavaRush student competition is coming to an end . Over the past few days, new participants have appeared, as well as clear leaders in the number of published works. It only gets more interesting :) If you haven't entered the competition yet, let us remind you that you have the whole weekend ahead of you, and it's not too late to share your Java learning story or valuable practice. In the meantime, check out a selection of the latest articles.

Little tricks with Heroku

Igor from Kiev shared life hacks for working with the free PaaS platform Heroku . This will be useful for novice programmers who use it to host their first projects. The main problem with “free cheese” is the regulated operating time of the application. Igor found several ways to bypass time restrictions and prevent the application from falling asleep.

Equals and hashCode contracts or whatever it is

Aleksandr Zimin (St. Petersburg) published detailed material about the rules for overriding methods equalsand hashCodetheir relationships, and also explained what happens if only one of the methods is overridden. As Alexander writes, he prepared this article to help himself, in order to collect the most complete information in one material. Therefore, if you have suggestions on what else can be added to the guide - read, write :)

Pattern Builder

Nina Mozharskaya (Kiev) prepared another material for the competition, showing the work of the Builder template using a detailed practical example.

Json scheme: why and who needs it

Sergeev Victor from St. Petersburg devoted a separate article to the use of Json schemas in Java. Json (JavaScript Object Notation) is a universal format for interaction between projects, which “grew” from JavaScript, but in fact its scope is much wider. Almost every programming language has libraries that make working with Json easier. What are the advantages of Json schemas for Java programming - read the material.

What to teach, where to teach, how to teach?

The most popular post among readers included in the second digest was written by Dmitry Mukhin . In his debut article about IT, he shared his experience of learning Java. What to watch, what to read, what to code on? Which books were the most clear, which courses were the most effective? The result is a concentrated portion of useful sources.

Sorting algorithms in theory and practice

The most active competitor, Viacheslav from St. Petersburg, published the third material. This time he shared with the JavaRush community a detailed overview of the types of sorting algorithms. If you want to understand the topic “from and to” - welcome! There are a few days left before we choose the winners, so like the content you like, or even better, publish your posts as part of the competition in the Random group . All the best :) JavaRush team.