I really like using (and making!) programming playgrounds, and I got thinking the other day about how I didn’t have a great list of playgrounds to refer to. So I asked on Mastodon for links to cool playgrounds.

Here’s what I came up with. I’d love to know what I missed.

• Compilers: godbolt compiler explorer by Matt Godbolt
• Shaders: shadertoy by Inigo Quilez and Pol Jeremias
• Arduino / IoT: wokwi from CodeMagic
• CSS/HTML/JS: CodePen by Chris Coyier, Alex Vasquez, and team
• CSS/HTML/JS: JSFiddle by Oskar Krawczyk and Piotr Zalewa
• CSS/HTML/JS: flems by Rasmus Porsager (saves all state in the URL)
• regular expressions:
  • for many languages: regex101 by Firas Dib
  • for Ruby: Rubular by Michael Lovitt
  • for JS/PCRE: regexr by gskinner
  • for Python: Pythex by Gabriel Rodríguez
• DNS: Mess With DNS by Julia Evans and Marie Flanagan
• DNS: DNS lookup tool by Julia Evans
• nginx: nginx playground by Julia Evans
• varnish: fastly fiddle from fastly
• SQLite: sqlime by Anton Zhiyanov (lets you load arbitrary SQLite databases)
• SQL: DB fiddle from Status200
• SQL: sql playground by Julia Evans
• Postgres: postgres playground from Crunchydata (runs postgres in the browser!)
• Git: oh my git by blinry and bleeptrack
• .NET bytecode: SharpLab by Andrey Shchekin
• Python bytecode: dis this by Pamela Fox

data formats

• Floating point: Float Exposed by Bartosz Ciechanowski
• Unicode: Unicode analyzer from fontspace
• Unicode: What unicode character is this? from babelstone
• ASN.1 certificates: ASN.1 JavaScript debugger by Lapo Luchini
• SVG: sssvg (interactive SVG reference) from fffuel (lots of other cool tools there)
• CBOR: CBOR playground
• cron: crontab guru from cronitor

programming languages

• official playgrounds:
  • Go
  • Rust
  • Ruby
  • Typescript
  • Haskell, C#, Elm, Kotlin, Scala, OCaml, Crystal, Svelte
• unofficial playgrounds:
  • PHP: 3v4l by Sjon Hortensius
  • Python/JS/C/C++/Java: Python Tutor by Philip Guo
  • many languages: replit
  • others: jqplay for jq, tryapl for APL

In A Mass Conspiracy to Feed People: Food Not Bombs and the World-Class Waste of Global Cities (Duke UP, 2021), David Boarder Giles explores the ways in which capitalism simultaneously manufactures waste and scarcity. Illustrating how communities of marginalized people and discarded things gather and cultivate political possibilities, Giles documents the work of Food Not Bombs (FNB), a global movement of grassroots soup kitchens that recover wasted grocery surpluses and redistribute them to those in need. He explores FNB's urban contexts: the global cities in which late-capitalist economies and unsustainable consumption precipitate excess, inequality, food waste, and hunger. Beginning in urban dumpsters, Giles traces the logic by which perfectly edible commodities are nonetheless thrown out—an act that manufactures food scarcity—to the social order of “world-class” cities, the pathways of discarded food as it circulates through the FNB kitchen, and the anticapitalist political movements the kitchen represents. Describing the mutual entanglement of global capitalism and anticapitalist transgression, Giles captures those emergent forms of generosity, solidarity, and resistance that spring from the global city's marginalized residents.  David Boarder Giles is a Lecturer in Anthropology at the School of Humanities and Social Sciences at Deakin university, Australia. His writes about waste, cities, and social movements. He is also one of the producers of Conversations in Anthropology. Blog: https://dhboardergiles.wordpress.com/ Twitter: @DHBoarderGiles Amir Sayadabdi is Lecturer in Anthropology at Victoria University of Wellington. He is mainly interested in anthropology of food and its intersection with gender studies, migration studies, and studies of race, ethnicity, and nationalism. Learn more about your ad choices. Visit megaphone.fm/adchoices Support our show by becoming a premium member! https://newbooksnetwork.supportingcast.fm/new-books-network



Download audio: https://www.podtrac.com/pts/redirect.mp3/pdst.fm/e/chtbl.com/track/1C3AGD/traffic.megaphone.fm/NBN3681862599.mp3?updated=1645108967

What do we believe now?

We think that coronavirus is moderately contagious and is spread primarily from person to person rather than by surfaces to person. We think the best way to get COVID-19 is to join an indoor dance and singing session and that outdoor spread is rare. We think indoor masks are valuable and outdoor masks are primarily social gestures. We think cloth masks work primarily by reducing spread from someone with early COVID-19 and minimal symptoms. As of today there's a suggestion that children get mild COVID-19 infections but don't spread them well.

We believe social distancing reduces spread but has a terrible economic cost that falls primarily on non-college workers and small business owners.

We believe effective therapies will emerge gradually over the next 4-18 months and effective vaccines over the next 6-18 months.

So what could we do now that would reduce infection, possibly suppress disease, and allow the economy to reopen?

We should test and trace of course, but given the state of American government and American media (Fox, Murdoch, etc) that's unlikely to be enough.

So what else could we do that doesn't require new technology or new innovation?

We could give everyone over a better indoor mask. A mask that gives bidirectional protection, that protects against both infection and transmission. Give it first to 70+, then 60+, then every adult.

What are the features of this mask?

It's reusable of course. Washable with a filter module that's easy to replace. It comes with a UV light sterilizer than can hold several masks. It's a high air flow mask; you can wear it to your indoor CrossFit speakeasy and get your deadlifts done. It's not medical grade, but it's a hell of a lot better than a surgical mask.

If you're going to wear a damned indoor mask, it should work.

This doesn't require new science. It doesn't require new technology. It doesn't require closing the economy. At $100 a unit we could give every American adult this mask and family UV sterilization unit for 30 billion dollars.

30 billion dollars. That's nothing. Jeff Bezos could do it from his change pocket.

Want to restart the economy?

Make this mask.