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  1. #!/bin/bash
  2. haystack="foo 1,bar"
  3. needle='(,|^)foo(,|$)'
  4. if [[ "$haystack" =~ $needle ]]; then
  5.     echo 'exists'
  6. else
  7.     echo 'does not exist'
  8. fi
Success #stdin #stdout 0s 19656KB
comments (?)
stdin 
Standard input is empty
stdout 
does not exist
https://ideone.com/x0KVdE
language:
Bash (bash 5.0.3)
created:
6 years ago
visibility:
secret

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