What is memory Leaks in Android development ?

The application creates objects, they lie in memory and can not clean out after the completion of its work.

Why is this happening ?

Java has its own means of clearing memory from unused items. This is garbage collection .

The garbage collector marks all objects that can be deleted if they are not referenced. Memory leak - this is just a lost reference, which shows that the object can not be deleted.

The complexity of this bug is that until a certain time it is not visible and it can not interfere. There's a good quote from Benjamin Franklin: “A small leak will sink a great ship." Memory leaks take the RAM of the application. The amount of raw memory will grow and may one day cause your app to slow down and crash . This will lead to user dissatisfaction and most likely the app will be removed...

Привет. Не давно была задача реализовать боковое меню со списком каталогов; что бы его можно было вставить в любое место и в любую страницу! Проблема заключалась в том что список большой и для того что бы он не нагружал сервак я его закэшировал, но тут не буду указывать как закэшировал так как писать придется долго... В общем буду описывать все по порядку!

To improve the ability to display information about users in the administrative panel of the site, implemented the ability to display user avatars, both in the special UserProfile model that has One-To-One relationship to the User model, and in the User model itself, it added an avatar display via inline form.

It looks like this:

List of user profiles

Greetings to all on the continuation of the topic of self-contained snap packages. In today's part, we will discuss how to configure the application so that it can be launched not only in the console, but also in the graphical environment (KDE, GNOME, XFCE, and so on).

Good day.

I create a Duty schedule application for our technical support hotline, using Qt + MySQL.
For each month it is necessary to monthly fill in the calendar table containing the date and sign of the day off or working day..

In connection with a small question on the forum and slightly free time today. I will answer in the form of an article on how to highlight in QTextEdit all the words that need to be found in this text.

To implement this functionality, you will need to use QSyntaxHighighter , as if writing a syntax highlighting code. Here, by the way, is an example of syntax highlighting for HTML .

And here's an example.

I propose to write a small application that will have two subdirectories. One of which will compile the executable file, and the second will contain a statically linked library.

As a result, the project will look like this.

I would like to welcome everyone to the continuation of the topic concerning a self-sufficient snap package. A lot of time has passed since the publication of the previous article in which I began to acquaint you with snap technology from my experience and application. All the fault of time, business, and laziness, of course, was also present) But we will now continue the topic)

After lengthy attempts to cope with JavaScript and its glitches in different browsers, I refused to write a WYSIWYG editor.

Thanks to the community (a survey was conducted in the public in VKontakte), which also shares my point on this matter. Namely, it is better to add a normal Markdown editor than Wysiwig.

Mysql по умолчанию не ставится в SuSe. Вместо него устанавливается MariaDB Разницы никакой пока не ощутил.

Итак сервер установлен. Проверим запущен ли он в системе. За что мне нравится SuSE с первого знакомства так это Yast. Yast-Система-Управление службами Находим mariadb устанавливаем запуск при загрузке и запускаем сервис. Сервис запустился. Появился файл /var/log/mysql/mysql.log В нем видим что сервис запустился и доступен только с 127.0.0.1 А хотелось бы работать с базой и с других машин.

Открываем файл /etc/my.cf Комментируем строку

     #bind-address = 127.0.0.1

Перезапускаем сервис.

 service mariadb restart

Теперь можно соединятся с сервером ото всюду.