Constant Folding Like C, Perl does a certain amount of expression evaluation at compile time whenever it determines that all arguments to an

${^UNICODE} Reflects certain Unicode settings of Perl. See

truncate FILEHANDLE,LENGTH truncate EXPR,LENGTH Truncates the file opened on FILEHANDLE, or named by EXPR

syswrite FILEHANDLE,SCALAR,LENGTH,OFFSET syswrite FILEHANDLE,SCALAR,LENGTH syswrite FILEHANDLE,SCALAR

NAME

NAME

NAME

NAME

NAME

rename OLDNAME,NEWNAME Changes the name of a file; an existing file NEWNAME will be clobbered. Returns true for success, false otherwise.