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Index: R

command (debugger) : Debugger Commands
-r file test operator : Named Unary and File Test Operators
-R file test operator : Named Unary and File Test Operators
rand function : rand
random numbers
- rand
- srand
range (..) operator
- Range Operator
- Awk Traps
$rdev file statistic : stat
read function : read
readdir function
- readdir
- DirHandle - Supply Object Methods for Directory Handles
- Time Efficiency
reading
- data via low-level system call : sysread
- file backwards : Examples
- input (awk) : Awk Traps
- permissions for processes : IPC::Open2 - Open a Process for Both Reading and Writing
- shared memory segment ID : shmread
Readline module : Readline Support
readlink function : readlink
ReadlKey module : Readline Support
ready file descriptors : select (ready file descriptors)
real gid : (see $ variables, $( variable)
real uid : (see $ variables, $)
real values, testing for : defined
$REAL_GROUP_ID : (see $ variables, $( variable)
$REAL_USER_ID : (see $ variables, $)
record delimiter : (see $ variables, $/ variable)
records
- input, separator for : (see $ variables, $/ variable)
- output, separator for : (see $ variables, $\ variable)
- variable-length : Formats
- of various data strcutures : More Elaborate Records
recursive
- open functions : open
- use of subroutines : Subroutines
recv function : recv
redo operator
- Loop control
- redo
ref function : ref
ref operator : Other Tricks You Can Do with Hard References
references : What Is a Reference?
- checking for : ref
- circular, and memory : Note on Garbage Collection
- to filehandles : Filehandle Referencers
- multidimensional arrays and : Brief Tutorial: Manipulating Lists of Lists
- to objects : Using Object Methods
- objects as : An Object Is Simply a Referenced Thingy
- passing : Passing References
- use strict 'refs' : strict - Restrict Unsafe Constructs
regexes : (see regular expressions)
regexps : (see regular expressions)
regular expressions
- (see also patterns)
- Regular Expressions
- Regular Expressions
- backreferences : Backreferences
- character classes : Regular Expressions
- extension syntax for : Regular expression extensions
- matching precedence : The rules of regular expression matching
- special variables for : Regular Expression Special Variables
relational operators
- (see comparison operators)
- Relational Operators
removing : (see deleting)
rename function : rename
repetition (x) operator
- String Operators
- Multiplicative Operators
replacing array elements : splice
require function : Modules
require operator
- Global Declarations
- Global Special Arrays
- require
REs : (see regular expressions)
reserved words : Variables
reset function : reset
restoring filehandles : SelectSaver - Save and Restore Selected Filehandle
return function : return
return value subroutine : Subroutines
reusing code
- Thinking of Code Reuse
- Developing with Style
reverse function : reverse
rewinddir function
- rewinddir
- DirHandle - Supply Object Methods for Directory Handles
right angle bracket : (see > (right angle bracket))
right justification : Format Variables
right-shift (>>) operator : Shift Operators
rindex function : rindex
RLENGTH variable (awk) : p
rmdir function : rmdir
rmtree() : File::Path - Create or Remove a Series of Directories
root directory, redefining : chroot
routines : (see subroutines)
row : (see records)
$RS : (see $ variables, $/ variable)
RSTART variable (awk) : p
running : (see executing)
runtests() : Test::Harness - Run Perl Standard Test Scripts with Statistics

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