fork(1) download 
  1. x <- c("aaa","aaaa","abababcdcd","cdababcdcd")
  2. gsub("(.{2,})\\1+","\\1",x)
  3. gsub("(.{2,})\\1+","\\1",x, perl=TRUE)
Success #stdin #stdout 0.19s 183680KB
comments (?)
stdin 
Standard input is empty
stdout 
[1] "aaa"        "aa"         "abcd"       "cdababcdcd"
[1] "aaa"    "aa"     "abcd"   "cdabcd"
https://ideone.com/kapxyZ
language:
R (R 3.5.2)
created:
6 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!