What does this expression in Perl programming do?
$variable =~ /^\s*$/;
What does this expression in Perl programming do? $variable =~ /^\s*$/;
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That’s looking for a line start (^), followed by zero or more whitespace (\s*) characters, followed by a line end ($).
It’s essentially looking for blank/empty lines.
I’d expect the expression to be used in something like:
in order to perform the check and a following action.