fork download
copy 
  1. v <- list(c("12", "1"), c("13", "1"), c("12", "3"))
  2. unique(sapply(v, "[[", 1))
  3.  
Success #stdin #stdout 0.24s 38792KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
[1] "12" "13"
https://ideone.com/NIxsLA
language:
R (R 3.5.2)
created:
4 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!