Symbols

-u file test operator : Named Unary and File Test Operators
-u switch, perl : Switches
uc function : uc
ucfirst function : ucfirst
uid (user ID) Global Special Variables chown assumed : Talking to yourself passwd file entry from : getpwuid
$uid file statistic : stat
umask function : umask
unary operators Calling conventions for unary operations Overloadable operations Number of Operands - (negation) : Unary Negation (-) arithmetic : Autoincrement and Autodecrement Operators glob operator as : Filename globbing operator ideographic : Ideographic Unary Operators named Filename globbing operator Named Unary and File Test Operators new Data Type Wrapper Objects Object Creation Operator (new) Creating New Objects with Constructors Creating Arrays typeof Undefined