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  1. #!/bin/bash
  2. l1='a1 a2 b1 b2 c1 c2'
  3. l2='a1 b3 c1'
  4. l1=$(comm -23 <(echo "$l1" | tr ' ' '\n' | sort) <(echo "$l2" | tr ' ' '\n' | sort) | tr '\n' ' ')
  5. echo "$l1"
Success #stdin #stdout 0s 5076KB
comments (?)
stdin 
Standard input is empty
stdout 
a2 b1 b2 c2
https://ideone.com/WskKn9
language:
Bash (bash 5.0.3)
created:
10 years ago
visibility:
secret

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