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  1. #!/bin/bash
  2. str='first , second ,, third, ,fourth   suffix'
  3. sed -E 's/[[:space:]]*(([,[:space:]])[[:space:]]*)+/\2/g' <<< "$str"
Success #stdin #stdout 0.01s 5536KB
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stdin
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Standard input is empty
stdout
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first,second,third,fourth suffix
https://ideone.com/SHO9Wp
language:
Bash (bash 5.0.3)
created:
3 years ago
visibility:
secret

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