Pretty. Keyboard shortcuts would be a nice addition.

Agree. Ideally then you would need a notion of "focus" — which piece is selected (bonus if there is a key to toggle between which piece has focus).

The corners appear as triangles in the figure. I counted all the triangles I could find and was confused because I only saw 7. But then I realized the 8th is around the outside of the whole figure!

I am not a JetBrains user, but it looks like that only applies to saved versions? Undo normally holds every typed change. https://www.jetbrains.com/help/idea/local-history.html#resto...

You’re usually autosaving. So it’s not every character, but maybe every minute and lots of other logical triggers like running the file. I’ve found it works very well.

In Emacs, if you select a region of text and invoke undo, it applies only to the selected text. Very useful sometimes.

(But also buggy...)

So many dead links! Sad, I would love to poke around a resource like this.

You might have luck on the wayback machine. But some of the links are really, really old: [Inscribing a regular pentagon in a circle – and proving it](https://web.archive.org/web/20001205213400/http://www.cut-th...) fell off the web after 2000!

And some others that are effectively dead, such as the page with the Java applet for Euclid's geometry.

Oh! Menus. I was confused, having come from a Hacker News link.

As in restaurant menus. Isn't that where software got the term?

Spam, menu, hamburger, byte, cookie, bug, apple...

Damn all computer lingo is just repurposed food terms isn't it?

Depending on your definition of simpler, everyone could just pair off and shake exactly one hand.

That's a good idea. Or you could have a grid of squares, with each person getting their own color when they click each one. Any of these ideas would work much better if you could prevent scripting of course.

"people want to have sex with women" Actually approximately 50% of people want to have sex with men.

Although your assertion makes logical sense, there appears to be a lot of evidence to the contrary.

https://www.photopea.com/ is similar to pixlr. I prefer it.

At first sight: It borrows a lot more from PS (including the complexity) compared to Pixlr, which seems like it wants to be a mix of Photoshop and Illustrator, but simplified like Figma. Thanks!