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Apple Wallet Discount Cards for Modern Gastronomy
My dear friend & client has just recently opened a bar, K7, just in the middle of Prague’s hip–famous Krymská street. As he wanted to offer discounts to his soon to be regulars, we did a brief brainstorm.
How to offer customers loyalty cards, without handing them a plastic thing, which nobody ever carries with them anyway?
Drink or two later, we had a brainwave. Digital Wallet Passes. For both Apple & Google.
Creative AI Battle: DALL·E vs Midjourney
July 2022 has brought us public betas of two impressive AI services for generating original images from text, OpenAI’s DALL·E 2 and Midjourney.
Both AIs offer similar “tell me what to paint” (text to image) service. Both use diffusion algorithms to reduce initial noice to an image matching your prompt, both utilise huge models trained on billions of parameters.
Let’s explore their features, strengths and weaknesses.
Note: when sharing AI generated image, always tell your prompt.
Making KioskPi — custom Raspberry Pi OS image using Pi-Gen
How to make use of Pi-Gen, a tool used to create Raspberry Pi OS images. Today, we’re gonna create our own Pi OS image featuring a Web-Based Kiosk with HDMI-CEC control. Minimalistic and performance-oriented. No desktop environments or Chromes to slow us down.
My specific use case is making a digital menu card to be displayed at three portrait mounted TVs in my friend’s canteen.
MySQL as smart JSON storage
I’ve been using this semi-relational, or SemiSQL, if you’d like, approach to SQL since around 2009. At first, I’d store the data as text or longtext types using PHP’s serialize(), but then I quickly moved to JSON.
In late 2015, with MySQL 5.7.8, our prayers were answered and the native support for JSON datatype was introduced. 🙏
Let’s have a look at the best practices using JSON in MySQL 8.
Cron backups into remote chroot using rsync [Linux how to]
A lot of us use cron & rsync -e ssh for backups. On the backup server, we’d love to chroot for many obvious reasons, but chroot breaks rsync. I’m sure you’ve tried & seen something like this:
protocol version mismatch -- is your shell clean?
Here’s my full solution on automated backups using chroot.
TLDR; if you’re only interested in making rsync work, head near the end.