提交 5f122b2d 编写于 作者: B brannx 提交者: eshellman

Update free-programming-playgrounds.md (#2754)

* Update free-programming-playgrounds.md

* remove trailing slash
上级 c1a4ef97
### Index ### Index
* [Angular](#angular) * [Angular](#angular)
* [ClojureScript](#clojurescript)
* [Crystal](#crystal) * [Crystal](#crystal)
* [CSS](#css) * [CSS](#css)
* [FlexBox](#flexbox) * [FlexBox](#flexbox)
...@@ -24,6 +25,11 @@ ...@@ -24,6 +25,11 @@
* [Plunker](http://plnkr.co) * [Plunker](http://plnkr.co)
### ClojureScript
* [Web REPL](http://clojurescript.net)
### Crystal ### Crystal
* [Compile & run code in Crystal](https://play.crystal-lang.org/#/cr) * [Compile & run code in Crystal](https://play.crystal-lang.org/#/cr)
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