Latest Articles

When a MySQL 8.0 client connects to a MySQL 5.7 server, the client overrides charset to utf8mb4 and breaks Japanese on a latin1 server — here is the fix.

Creating a dashboard and advertisement slideshow as a web application on a website, and displaying it on Windows digital signage.

Here's an introduction to a code snippet that waits for an element to disappear, using Pyppeteer, which is Python's version of Puppeteer. The same approach should work similarly in Puppeteer's JavaScript version.

Why specifying `choices` on a Django `CharField` makes `list_filter` faster — it bypasses the DISTINCT query the admin runs to enumerate filter values.

Even though the Pipfile specifies ```plaintext [packages] ... Werkzeug = "<1.0.0" ``` running ```plaintext pipenv install --system --skip-lock --dev --deploy ``` installs version 1.0.1.

Launch VSCode (`code.cmd`) from a Flutter Windows app via `Process.run`. Covers how to pass arguments and handle quoting issues correctly.

Dart's `dio` HTTP client lowercases all request header names, which can break authentication against old servers that treat header casing as significant.

Sometimes, USB memory sticks that have been used for creating OS installation media may have a corrupted partition table, making it impossible to format them using the "Disk Utility" app.

When Django uses multiple databases and `ForeignKey` cannot traverse across them — `router.allow_relation` behavior and raw SQL workarounds.

Fix `zlib`-related errors when `pip install mysqlclient` (old MySQL-python) — `brew install zlib` and add the right `LDFLAGS`.

Notes on porting a JAN code check-digit validation script from ASP.NET / JavaScript to PHP, with a working PHP sample.

Install ChromeDriver 126 on Ubuntu 22.04 and run Selenium against it — apt + manual download steps, plus matching the Chromium / Chrome version.

Set the system timezone of Alpine Linux to JST (Asia/Tokyo), including how to do it inside a Dockerfile.

When building a Docker image on a Mac, you might encounter the "no space left on device" error. This can happen even when there seems to be enough storage space available, leaving you puzzled about the cause.

Fix compile errors when installing Python's `grpcio` — workarounds for missing C++ headers and CFLAGS adjustments to make `pip install grpcio` succeed.

Fix screen redraw issues when Mac Quick Look or Finder content is displayed on a DisplayLink-connected screen.

Inspect `django-redis` cached values directly from `manage.py shell` — both `cache.get` and the raw Redis client commands.

Insert a custom HTML snippet or help text into a Django Admin Inline formset (TabularInline / StackedInline) — implementation patterns.

If you want to create a different URL for Django's Admin while keeping /admin/ intact: Create an instance using `from django.contrib.admin import AdminSite` and `site = AdminSite(name='staff')`.

Suppress the geckodriver log file in Selenium Firefox by setting `service_log_path` (or sending it to `os.devnull`).