Django → Django - Tutorial 033. Passing the argument list to the order_by method to sort the QuerySet

сортировка, sort, Django

To improve the usability of article sections, we sorted articles by date, title, and number of views. In addition, the ability to find information on articles of the section has been added. This feature is implemented through several checkboxes that …

Android → Android. Java vs Qt QML - Tutorial 002. Handling of button clicks

Qt, Android, JAVA, button, QML

After we got acquainted with Hello World from the Java world and Qt QML under Android, I suggest writing an application that will have two buttons and by clicking on these buttons it will change the text in a small …

Qt → Qt/C++ - Tutorial 075. Improving the syntax of signals and slots in Qt 5.7 and above for overloaded signals and slots

слоты, Qt, сигналы

In Qt, different classes have a number of signals and slots that have overloads, so that the connection recording looks simply monstrous, when static_cast is required to specify a particular signal or slot.

So, in Qt, there is a functional …

Python → Python 3 - Tutorial 003. Basic Syntax

Синтаксис, Python 3, Syntax

The Python language has many similarities to Perl, C, and Java. However, there are some definite differences between the languages.

First Python Program

Let us execute the programs in different modes of programming.

Interactive Mode Programming

Invoking the interpreter without …

Android → Android. Java vs Qt QML - Tutorial 001. Hello World

Qt, JAVA, Android, QML

Curiosity sake decided to compare the two options for writing applications for Android. Once upon a time, I began to work on programming for Android on Java, but over time I switched to developing Desktop applications on Qt QML. But …

Python → Python 3 - Tutorial 002. Environment Setup

Python 3, Python

Python 3 is available for Windows, Mac OS and most versions of the Linux operating system.

Local Environment Setup

Open a terminal window and type "python" to find out if it is already installed and which version is installed.

Getting …

C++ → Cooking lambda functions in C ++ - Part 1

С++, лямбда функция

My favorite tool in C ++ is lambda functions, although somehow they told me that they seem scary. In fact they are lovely. They greatly simplify the writing of programs and allow you to make quite interesting decisions.

But before …

Python → Python 3 - Tutorial 001. Introduce

Python, Python 3

Python is a general-purpose interpreted, interactive, object-oriented, and high-level programming language. It was created by Guido van Rossum during 1985- 1990. Like Perl, Python source code is also available under the GNU General Public License (GPL). Python is named after …

Django → Django - Tutorial 032. Advanced search options

Django, Search

The site has functional, thanks to which you can ask a question on the forum with an article on the site to which this question relates in one way or another. This is done through external keys from the topic …

C++ → The Pimpl Programming Pattern - What You Should Know

C++, Pimpl

Basics

You may come across the Pimpl template under other names: d-pointer, compiler firewall, or even Cheshire Cat template or opaque pointer.

In its main form, the template looks like this:

• In a class, we move all private members to …

Qt → Development on Qt for iOS

ios, qt

Preamble

The most democratic country in the world has created the most totalitarian operating system. Therefore, if you want to test your software on an iPad or IPhone, you must register with https://developer.apple.com/ as a developer. At the first stage, …

Qt → Qt Cloud Messaging API available for embedded systems

Cloud, Messaging, QML

Problems with cloud messaging for embedded devices inspired the Kaltiot & SnowGrains teams to create a cross-platform Qt API that makes it easy to send messages from embedded devices. The API is called Qt Cloud Messaging API and is built …