fork download 
  1. /(?<=(?:aa|a)a)/
Runtime error #stdin #stdout #stderr 0.01s 6084KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
stderr 
prog.rb:1: invalid pattern in look-behind: /(?<=(?:aa|a)a)/
https://ideone.com/mUwCIE
language:
Ruby (ruby 2.5.5)
created:
2 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!