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  1. #!/bin/bash
  2. s="#Foo bar
  3. Foo bar
  4. #Baz foo
  5. Baz foo"
  6. perl -pe 's/o{2,}/"O" x length($&)/ge' <<< "$s"
Success #stdin #stdout 0.01s 5432KB
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stdin
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Standard input is empty
stdout
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#FOO bar
FOO bar
#Baz fOO
Baz fOO
https://ideone.com/EY14RZ
language:
Bash (bash 5.0.3)
created:
2 years ago
visibility:
secret

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