Perl in a Nutshell, 2nd Edition

Perl Functions by Category

Here are Perl’s functions and function-like keywords, arranged by category. Note that some functions appear in more than one category.

Scalar manipulation

chomp, chop, chr, crypt, hex, index, lc, lcfirst, length, oct, ord, pack, q//, qq//, reverse, rindex, sprintf, substr, tr///, uc, ucfirst, y///

Regular expressions and pattern matching

m//, pos, qr//, quotemeta, s///, split, study

Numeric functions

abs, atan2, cos, exp, hex, int, log, oct, rand, sin, sqrt, srand

Array processing

pop, push, shift, splice, unshift

List processing

grep, join, map, qw//, reverse, sort, unpack

Hash processing

delete, each, exists, keys, values

Input and output

binmode, close, closedir, dbmclose, dbmopen, die, eof, fileno, flock, format, getc, print, printf, read, readdir, rewinddir, seek, seekdir, select, syscall, sysread, sysseek, syswrite, tell, telldir, truncate, warn, write

Fixed-length data and records

pack, read, syscall, sysread, syswrite, unpack, vec

Filehandles, files, and directories

chdir, chmod, chown, chroot, fcntl, glob, ioctl, link, lstat, mkdir, open, opendir, readlink, rename, rmdir, stat, symlink, sysopen, umask, unlink, utime

Flow of program control

caller, continue, die, do, dump, eval, exit, goto, last, next, redo, return, sub, wantarray

Scoping

caller, import, local, my, package, use

Miscellaneous

defined, dump, eval, formline, local, my, prototype, reset, scalar, undef, wantarray

Processes and process groups

alarm, exec, fork, getpgrp, getppid, getpriority ...