_It’s Play inDay, so I thought I might pass along this _list of programming playgrounds I happened across recently. Some of them you may already be familiar with (e.g., JSFiddle), but for me a lot of these playgrounds were novel. I’m particularly impressed with the compiler explorer, and crontab guru had me shouting “My God, where was this 15 years ago? I could’ve really used this!” I think the next one I’m going to dive into is Oh My Git xkcd 1597 ( is a little too real for comfort).
Happy playing!