Advanced Functions
Learn about advanced functions in Perl.
We'll cover the following
Functions are the foundation of many advanced Perl features.
Context awareness
Perl’s built-ins know whether we’ve invoked them in void, scalar, or list context. So too can our functions. The wantarray
built-in returns undef
to signify void context, a false value to signify scalar context, and a true value to signify list context. Yes, it’s misnamed; see perldoc -f wantarray
for proof.
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