Add R-Fiddle to playgrounds (EbookFoundation#2632)

Add R section to playground and add R-Fiddle to it.
batman1911 · Nov 1, 2017 · 6d930f3 · 6d930f3
1 parent 7edba3f
commit 6d930f3
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/free-programming-playgrounds.md b/free-programming-playgrounds.md
@@ -13,6 +13,7 @@
 * [Perl](#perl)
 * [PHP](#php)
 * [Python](#python)
+* [R](#r)
 * [Ruby](#ruby)
 * [Rust](#rust)
 * [SQL](#sql)
@@ -95,6 +96,11 @@
 * [Pyfiddle](https://pyfiddle.io)
 
 
+### R
+
+* [R-Fiddle](http://www.r-fiddle.org)
+
+
 ### Ruby
 
 * [Codepad](http://codepad.org)