Perl Cookbook, Second Edition
| [SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z] validation( ) values [See also numbers strings variables][See also numbers strings variables] comma-separated initializing arrays with parsing converting strings between definedness 2nd exchanging between scalar variables false values( ), traversing hashes variable-length text fields variables constants default values for expanding in user input filehandles in functions private for loop (iterator) variables magic, creating persistent private, for subroutines private, for modules private, for subroutines scalars [See scalars] sharing among different processes strings [See strings] $VERSION variable (use pragma) VERSION( ) vertical bar (|) || operator vs. or operator separating multiple comparisons ||= (assignment) operator visual bell VRFY command vrfy program |