Github user mxm commented on the pull request:
https://github.com/apache/flink/pull/796#issuecomment-109998768
My bad. Sorry for bothering. I had slightly modified the example. We could,
however, just remove the if statement and it would work without creating an
external process:
```bash
[[ "hello bli blub 123 353" =~ ^([0-9a-zA-Z/.-]+).*$ ]]
SLAVE=${BASH_REMATCH[1]}
```
I agree that it is cleaner to have only one comment character. Only
disadvantage I see is that it breaks backwards-compatibility. The whole thing
needs a bit of cleanup. For example, the "network topology" seems a bit weird
and is probably a legacy feature.
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