AWK: Difference between revisions

Latest revision as of 22:47, 10 April 2023

AWK is a pattern matching programming language primarily used in UNIX like systems for software pre-processing and other text handling tasks. It is named after initials of original writers Alfred Aho, Peter Weinberger, and Brian Kernighan and should therefore be spelled all caps.

History

1977: old awk (awk)
new awk (nawk)
POSIX awk

Constructs

Comparison Expressions: Relational Operators:

< <= == != >= > ~ !~

Conditional Expressions

Computation

+ - * / % ^

Compound Patterns

&& || !

Range Patterns
Variables
Conditional Statements: if; if/else
Loops: while; for
Program Control: next; exit
Arrays

Built-In Functions

String

sub, gsub
index
length
substr
match
split

Arithmetic

atan2
cos
exp
int
log
rand
sin
sqrt
srand

OS/2 Implementations

Compiler

Preditor/2 - Has a built in extended AWK compiler
TAWK Compiler for OS/2 from Thompson Automation Software

Interpreter

GNU awk - Open source
QTAwk 1.22 (1997-01-07) - Shareware
mawk - Michael Brennan - Open Source (GPL)
SAWK - Sandeep Dutta

Translators

a2p - AWK to PERL translator - Open source (included with Perl 5)

Editor support

Elvis - awk syntax support included by default
Lugaru Epsilon - AWK syntax highlighting, code folding and syntax-aware autoindent available as a separate download.
NEdit - XFree86 - Autoindent, autocomplete and syntax highlighting.
Preditor/2 - AWK template, syntax highlighting and debugging features.

Programmer's utilities

Exuberant ctags - Creates index files out of AWK source files - Open source - Current.

DOS Implementations

Bawk - Bob Brodt
Gawk
QTAwk - Pearl Boldt

Editor support

Elvis - awk syntax support included by default
Lugaru Epsilon - AWK syntax highlighting, code folding and syntax-aware auto-indent available as a separate download.

Java Implementations

Jawk - J2SE 5

Editor support

jEdit - Java based editor - AWK syntax highlighting built in

Publications

Leon S. Levy: A Walk Through AWK, SIGPLAN Notices Vol. 18 #12 Dec 1983, pp.69-85
Alfred V. Aho, Brian W. Kernighan, and Peter J. Weinberger: The AWK Programming Language Addison-Wesley 1988, ISBN 0-201-07981-X
Dale Dougherty, Arnold Robbins: sed & awk O’Reilly 1997, ISBN 1-56592-225-5
Arnold Robbins: GAWK: Effective AWK Programming O’Reilly 2001, ISBN 0-596-00070-7

Links

Awk Community Portal
The A-Z of Programming Languages: AWK - An interview with Alfred V. Aho - From Computerworld

@@ Line 1: / Line 1: @@
 AWK is a pattern matching programming language primarily used in [[UNIX]] like systems for software pre-processing and other text handling tasks. It is named after initials of original writers Alfred Aho, Peter Weinberger, and Brian Kernighan and should therefore be spelled all caps.
+==History==
+*1977: old awk (awk)
+*new awk (nawk)
+*POSIX awk
+==Constructs==
+;Comparison Expressions
+:Relational Operators:
+ < <= == != >= > ~ !~
+:Conditional Expressions
+:Computation
+ + - * / % ^
+:Compound Patterns
+ && || !
+:Range Patterns
+;Variables
+;Conditional Statements
+:if
+:if/else
+;Loops
+:while
+:for
+;Program Control
+:next
+:exit
+;Arrays
+==Built-In Functions==
+String
+* sub, gsub
+* index
+* length
+* substr
+* match
+* split
+Arithmetic
+* atan2
+* cos
+* exp
+* int
+* log
+* rand
+* sin
+* sqrt
+* srand
 ==OS/2 Implementations==
 ;Compiler
-* [[Preditor/2]] - Has a built in extended AWK compiler - Commercial - Discontinued.
+* [[Preditor/2]] - Has a built in extended AWK compiler
 * [[TAWK]] Compiler for OS/2 from ''Thompson Automation Software''
 ;Interpreter
-* [[GNU awk]] - Open source - Current
+* [[GNU awk]] - Open source
 * QTAwk 1.22 (1997-01-07) - Shareware
-* mawk - Michael Brennan - Open Source (GPL) - Discontinued
+* mawk - Michael Brennan - Open Source (GPL)
+* SAWK - Sandeep Dutta
 ;Translators
@@ Line 15: / Line 62: @@
 ;Editor support
-* [[Elvis]] - awk syntax support included by default - Open source - Current
+* [[Elvis]] - awk syntax support included by default
-* [[Lugaru Epsilon]] - AWK syntax highlighting, code folding and syntax-aware autoindent available as a separate download. - Commercial.
+* [[Lugaru Epsilon]] - AWK syntax highlighting, code folding and syntax-aware autoindent available as a separate download.
 * [[NEdit]] - XFree86 - Autoindent, autocomplete and syntax highlighting.
-* [[Preditor/2]] - AWK template, syntax highlighting and debugging features - Commercial - Discontinued.
+* [[Preditor/2]] - AWK template, syntax highlighting and debugging features.
 ;Programmer's utilities
@@ Line 25: / Line 72: @@
 ==DOS Implementations==
 * Bawk - Bob Brodt
-* [http://esca.atomki.hu/paradise/dos/awk-en.html Gawk]
+* Gawk
 * QTAwk - Pearl Boldt
 ;Editor support
-* [[Elvis]] - awk syntax support included by default - Open source - Current
+* [[Elvis]] - awk syntax support included by default
-* [[Lugaru Epsilon]] - AWK syntax highlighting, code folding and syntax-aware autoindent available as a seperate download. - Commercial.
+* [[Lugaru Epsilon]] - AWK syntax highlighting, code folding and syntax-aware auto-indent available as a separate download.
 ==Java Implementations==
@@ Line 36: / Line 83: @@
 ;Editor support
-* [[jEdit]] - Java based editor - AWK syntax highlighting built in - Current.
+* [[jEdit]] - Java based editor - AWK syntax highlighting built in
 ==Publications==
@@ Line 48: / Line 95: @@
 * [http://www.computerworld.com.au/article/216844/a-z_programming_languages_awk/ The A-Z of Programming Languages: AWK] - An interview with Alfred V. Aho - From [[Computerworld]]
-[[Category:Programming Languages]][[Category:AWK]]
+[[Category:Scripting Language]][[Category:AWK]]