fork download
copy 
  1. #!/bin/bash
  2.  
  3. s="foo FOOfOoFoOBARBARbarbarbAr";
  4. grep -Eo '[Ff][Oo][Oo]|BAR' <<< "$s"
  5.  
  6. grep -Po '(?i:foo)|BAR' <<< "$s"
  7.  
Success #stdin #stdout 0.01s 5504KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
foo
FOO
fOo
FoO
BAR
BAR
foo
FOO
fOo
FoO
BAR
BAR
https://ideone.com/i6JRbL
language:
Bash (bash 5.0.3)
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!