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can understand one line of code
s### is the substitution operator using the # character as the delimiter instead of the more conventional s/// delimiters. The $ denotes the end of the string (perlre).
Tip #6 from the Basic debugging checklist:
B::Deparse can help identify this.
Update: correction thanks to johngg
A foolish day
Just another day
Internet cleaning day
The real first day of Spring
The real first day of Autumn
Wait a second, ... is this poll a joke?
Results (493 votes),