Django → Analysis of errors in the development and promotion of a site on Django - Custom tag<cut>

development, Django, Custom

And now some thoughts on the topic of custom tags, and whether they should be introduced at all.

The short answer is NO.

Now let's think about this topic - "Why?" . There is such a well-known Russian-language resource Habr, …

Django → Analysis of errors in the development and promotion of a site on Django - Multilingual forms

forms, Мультиязычноть, Django, Translations

With this publication, I would like to start sharing my observations after almost seven years of supporting the EVILEG project. So that every newbie could roughly understand and imagine whether it is worth doing a similar or different functionality or …

Java → Java Array Programs

Java, Interview

Arrays in java:

• An array is the basic Data Structure that contains items of similar data types.
• There is always an ordering amongst the position of the element.
• It can be accessed with the help of the indices. Java supports …

C++ → Leet Code Solutions - 003 - Longest Substring Without Repeating Characters

cpp, LeetCode, C++, C++17, string

Solution "Longest Substring Without Repeating Characters" on Leet Code

class Solution {
public:
    int lengthOfLongestSubstring(string s) {
        string candidate_str = "";
        string checking_str = "";
        size_t position = std::string::npos;
        for (auto& ch : s)
        {
            position = checking_str.find(ch);
            if (position …

C++ → Leed Code Solutions - 002 - Add Two Numbers

LeetCode, cpp, C++

Solution "Add Two Numbers" on Leet Code

/**
 * Definition for singly-linked list.
 * struct ListNode {
 *     int val;
 *     ListNode *next;
 *     ListNode() : val(0), next(nullptr) {}
 *     ListNode(int x) : val(x), next(nullptr) {}
 *     ListNode(int x, ListNode …

C++ → Leet Code Solutions - 001 - Two Sum

cpp, LeetCode, C++

Two Sum solution on Leet Code

The simple solution

class Solution {
public:
    vector<int> twoSum(vector<int>& nums, int target) {
        for (int i = 0; i < nums.size(); ++i)
        {
            for (int j = i + 1; j < nums.size(); ++j) …

Django → Django - Lesson 059. Saving the selected language in user settings

python, language, django, translation

In this article, I would like to show an example of how you can make a link on the site so that the user can switch between languages on the site.

But I will show a more advanced version of …

Projects based on Qt → How to implement TLSv1.2 on Qt 4.8.1

qssl

Initially, QSsl in Qt 4.8.1 (released about 13 years ago) used only the maximum of TLS v1.0.

Today is 2022 and Tls v1.0 and v1.1 are being blocked by almost every decent site on the internet.

Qt in QSsl uses …

Django → Django - Tutorial 058. Database Growth Due to django_session Table

Django, Postgres, garbage collection, Python, PostgreSQL

Lately, I have noticed that the fatal moment is approaching, when the disk space for the site on the hosting will catastrophically cease to be enough. And the database dump becomes incredibly huge, although there are no obvious prerequisites for …

Django → Django Rest Framework - Tutorial 001. Adding Token Authentication

Django Rest Framework, QML, Authentication, Token, drf, Felgo

At the moment I am actively working on an application that will work with the REST API of a Django site. And one of the first steps was to set up user authentication by token, but in order for this …

Django → Django - Lesson 057. Multilanguage support in MarkdownField with auto populate functionality

MarkdownField, markdown, modeltranslation, Django

The article How to write auto populate field functionality described the simplest functionality of the MarkdownField field to support markdown syntax on a site with automatic generation of html content.

I did not immediately show advanced functionality to make it …

Django → Django - Tutorial 056. How to convert image to WEBP format when saving to ImageField

ImageField, Django, WEBPField, webp, Python

WEBP is an image compression format that was introduced by Google in 2010. Its main advantage is its low size without visible loss of quality compared to formats such as JPEG or PNG. Therefore, it is quite logical to use …