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Index: R

data via low-level system call : 3.2.166. sysread
file backwards : 7.2.8.6. Examples
input (awk) : 8.2.3. Awk Traps
permissions for processes : 7.2.39. IPC::Open2 - Open a Process for Both Reading and Writing
shared memory segment ID : 3.2.146. shmread

Readline module : 8.1.4. Readline Support

readlink function : 3.2.118. readlink

ReadlKey module : 8.1.4. Readline Support

ready file descriptors : 3.2.135. select (ready file descriptors)

real gid : (see $ variables, $( variable)

real uid : (see $ variables, $< variable)

real values, testing for : 3.2.25. defined

$REAL_GROUP_ID : (see $ variables, $( variable)

$REAL_USER_ID : (see $ variables, $< variable)

record delimiter : (see $ variables, $/ variable)

records

input, separator for : (see $ variables, $/ variable)
output, separator for : (see $ variables, $\ variable)
variable-length : 2.8. Formats
of various data strcutures : 4.7.5. More Elaborate Records

recursive

open functions : 3.2.102. open
use of subroutines : 2.7. Subroutines

recv function : 3.2.119. recv

redo operator

2.6.4.4. Loop control
3.2.120. redo

ref function : 3.2.121. ref

ref operator : 4.3.5. Other Tricks You Can Do with Hard References

references : 4.1. What Is a Reference?

checking for : 3.2.121. ref
circular, and memory : 5.3.9. A Note on Garbage Collection
to filehandles : 4.2.6. Filehandle Referencers
multidimensional arrays and : 4.6. A Brief Tutorial: Manipulating Lists of Lists
to objects : 4.3.4. Using Object Methods
objects as : 5.3.3. An Object Is Simply a Referenced Thingy
passing : 2.7.2. Passing References
use strict 'refs' : 7.2.59. strict - Restrict Unsafe Constructs

regexes : (see regular expressions)

regexps : (see regular expressions)

regular expressions

(see also patterns)
1.7. Regular Expressions
2.4.1. Regular Expressions
backreferences : 1.7.4. Backreferences
character classes : 1.7. Regular Expressions
extension syntax for : 2.4.1.4. Regular expression extensions
matching precedence : 2.4.1.2. The rules of regular expression matching
special variables for : 2.9.1. Regular Expression Special Variables

relational operators

(see comparison operators)
2.5.11. Relational Operators

removing : (see deleting)

rename function : 3.2.122. rename

repetition (x) operator

1.5.2. String Operators
2.5.7. Multiplicative Operators

replacing array elements : 3.2.154. splice

require function : 5.2. Modules

require operator

2.6.7. Global Declarations
2.9.4. Global Special Arrays
3.2.123. require

REs : (see regular expressions)

reserved words : 2.3.1. Variables

reset function : 3.2.124. reset

restoring filehandles : 7.2.54. SelectSaver - Save and Restore Selected Filehandle

return function : 3.2.125. return

return value subroutine : 2.7. Subroutines

reusing code

5.5.8. Thinking of Code Reuse
8.4. Programming with Style

reverse function : 3.2.126. reverse

rewinddir function

3.2.127. rewinddir
7.2.11. DirHandle - Supply Object Methods for Directory Handles

right angle bracket : (see > (right angle bracket))

right justification : 2.8.1. Format Variables

right-shift (>>) operator : 2.5.9. Shift Operators

rindex function : 3.2.128. rindex

RLENGTH variable (awk) : 6.4.2.2. a2p

rmdir function : 3.2.129. rmdir

rmtree() : 7.2.31. File::Path - Create or Remove a Series of Directories

root directory, redefining : 3.2.17. chroot

routines : (see subroutines)

row : (see records)

$RS : (see $ variables, $/ variable)

RSTART variable (awk) : 6.4.2.2. a2p

running : (see executing)

runtests() : 7.2.66. Test::Harness - Run Perl Standard Test Scripts with Statistics

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