[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]
/o pattern-matching modifier
O_ flags
2nd
O_NONBLOCK option
OASIS group
object attributes
object methods
object-oriented programming
2nd
objects
cloning parent objects
closures as
constructing
2nd
destroying
2nd
determining subclass membership
managing class data
managing instance data
tied objects
oct( )
octal numbers, converting
values, working with symbolic file permissions instead
octets
treating Unicode strings as
open pragma
open( )
[See also processes] caching open filehandles
creating temporary files
file access modes
file descriptors, creating aliases for
filehandles
storing in variables
filtering output
magic open
reading from other programs
unusual filenames
opendir( )
globbing
readdir( )
opening file descriptors
files
OpenSSL libraries
operators line input
2nd
overloading
OR functionality in regular expressions
or operator, vs. || operator
ord( )
outer( )
outlaw $_ program
outline programs
output controlling decimal places
controlling for other programs
filtering
flushing
gathering from programs
random access I/O
writing to other programs
output( )
output_fh( )
output_file( )
overloading operators
overridden methods
overriding built-in functions
signal handlers
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