=over =item prototype FUNCTION X<prototype> =item prototype Returns the prototype of a function as a string (or L<C<undef>|/undef EXPR> if the function has no prototype). FUNCTION is a reference to...

=over =item setpriority WHICH,WHO,PRIORITY X<setpriority> X<priority> X<nice> X<renice> Sets the current priority for a process, a process group, or a user. (See L<setpriority(2)>.) Raises an excep...

=over =item gmtime EXPR X<gmtime> X<UTC> X<Greenwich> =item gmtime Works just like L<C<localtime>|/localtime EXPR>, but the returned values are localized for the standard Greenwich time zone. Note:...

=over =item no MODULE VERSION LIST X<no declarations> X<unimporting> =item no MODULE VERSION =item no MODULE LIST =item no MODULE =item no VERSION See the L<C<use>|/use Module VERSION LIST> functio...

=over =item untie VARIABLE X<untie> Breaks the binding between a variable and a package. (See L<tie|/tie VARIABLE,CLASSNAME,LIST>.) Has no effect if the variable is not tied. =back

=over =item else =item elsif =item for =item foreach =item if =item unless =item until =item while These flow-control keywords are documented in L<perlsyn/"Compound Statements">. =back

=over =item and =item cmp =item eq =item ge =item gt =item isa =item le =item lt =item ne =item not =item or =item x =item xor These operators are documented in L<perlop>. =back

=head1 NAME X<data structure> X<complex data structure> X<struct> perldsc - Perl Data Structures Cookbook =head1 DESCRIPTION Perl lets us have complex data structures. You can write something like ...

=over =item getpwnam NAME X<getpwnam> X<getgrnam> X<gethostbyname> X<getnetbyname> X<getprotobyname> X<getpwuid> X<getgrgid> X<getservbyname> X<gethostbyaddr> X<getnetbyaddr> X<getprotobynumber> X<...

=over =item system LIST X<system> X<shell> =item system PROGRAM LIST Does exactly the same thing as L<C<exec>|/exec LIST>, except that a fork is done first and the parent process waits for the chil...