|
|
Home | Switchboard | Unix Administration | Red Hat | TCP/IP Networks | Neoliberalism | Toxic Managers |
| (slightly skeptical) Educational society promoting "Back to basics" movement against IT overcomplexity and bastardization of classic Unix | |||||||
(Taken from http://www.crazygrrl.com/weav/reference.php3 and modified to fit on one page, at least in Opera 8. Ow, and damn you for blogmarking this, Mathias! ;] Can't. Handle. The. Requests.)
^ |
The pattern has to appear at the beginning of a string. | ^cat matches any string that begins with cat |
|---|---|---|
$ |
The pattern has to appear at the end of a string. | cat$ matches any string that ends with cat |
. |
Matches any character. | cat. matches catT and cat2 but not catty |
[] |
Bracket expression. Matches one of any characters enclosed. | gr[ae]y matches gray or grey |
[^] |
Negates a bracket expression. Matches one of any characters EXCEPT those enclosed. | 1[^02] matches 13 but not 10 or 12 |
[-] |
Range. Matches any characters within the range. | [1-9] matches any single digit EXCEPT 0 |
? |
Preceeding item must match one or zero times. | colou?r matches color or colour but not colouur |
+ |
Preceeding item must match one or more times. | be+ matches be or bee but not b |
* |
Preceeding item must match zero or more times. | be* matches b or be or beeeeeeeeee |
() |
Parentheses. Creates a substring or item that metacharacters can be applied to | a(bee)?t matches at or abeet but not abet |
{n} |
Bound. Specifies exact number of times for the preceeding item to match. | [0-9]{3} matches any three digits |
{n,} |
Bound. Specifies minimum number of times for the preceeding item to match. | [0-9]{3,} matches any three or more digits |
{n,m} |
Bound. Specifies minimum and maximum number of times for the preceeding item to match. | [0-9]{3,5} matches any three, four, or five digits |
| |
Alternation. One of the alternatives has to match. | July (first|1st|1) will match July 1st but not July 2 |
[:alnum:] |
alphanumeric character | [[:alnum:]]{3} matches any three letters or numbers, like 7Ds |
|---|---|---|
[:alpha:] |
alphabetic character, any case | [[:alpha:]]{5} matches five alphabetic characters, any case, like aBcDe |
[:blank:] |
space and tab | [[:blank:]]{3,5} matches any three, four, or five spaces and tabs |
[:digit:] |
digits | [[:digit:]]{3,5} matches any three, four, or five digits, like 3, 05, 489 |
[:lower:] |
lowercase alphabetics | [[:lower:]] matches a but not A |
[:punct:] |
punctuation characters | [[:punct:]] matches ! or . or , but not a or 3 |
[:space:] |
all whitespace characters, including newline and carriage return | [[:space:]] matches any space, tab, newline, or carriage return |
[:upper:] |
uppercase alphabetics | [[:upper:]] matches A but not a |
// |
Default delimiters for pattern | /colou?r/ matches color or colour |
|---|---|---|
i |
Append to pattern to specify a case insensitive match | /colou?r/i matches COLOR or Colour |
\b |
A word boundary, the spot between word (\w) and non-word (\W) characters |
/\bfred\b/i matches Fred but not Alfred or Frederick |
\B |
A non-word boundary | /fred\B/i matches Frederick but not Fred |
\d |
A single digit character | /a\db/i matches a2b but not acb |
\D |
A single non-digit character | /a\Db/i matches aCb but not a2b |
\n |
The newline character. (ASCII 10) | /\n/ matches a newline |
\r |
The carriage return character. (ASCII 13) | /\r/ matches a carriage return |
\s |
A single whitespace character | /a\sb/ matches a b but not ab |
\S |
A single non-whitespace character | /a\Sb/ matches a2b but not a b |
\t |
The tab character. (ASCII 9) | /\t/ matches a tab. |
\w |
A single word character - alphanumeric and underscore | /\w/ matches 1 or _ but not ? |
\W |
A single non-word character | /a\Wb/i matches a!b but not a2b |
Society
Groupthink : Two Party System as Polyarchy : Corruption of Regulators : Bureaucracies : Understanding Micromanagers and Control Freaks : Toxic Managers : Harvard Mafia : Diplomatic Communication : Surviving a Bad Performance Review : Insufficient Retirement Funds as Immanent Problem of Neoliberal Regime : PseudoScience : Who Rules America : Neoliberalism : The Iron Law of Oligarchy : Libertarian Philosophy
Quotes
War and Peace : Skeptical Finance : John Kenneth Galbraith :Talleyrand : Oscar Wilde : Otto Von Bismarck : Keynes : George Carlin : Skeptics : Propaganda : SE quotes : Language Design and Programming Quotes : Random IT-related quotes : Somerset Maugham : Marcus Aurelius : Kurt Vonnegut : Eric Hoffer : Winston Churchill : Napoleon Bonaparte : Ambrose Bierce : Bernard Shaw : Mark Twain Quotes
Bulletin:
Vol 25, No.12 (December, 2013) Rational Fools vs. Efficient Crooks The efficient markets hypothesis : Political Skeptic Bulletin, 2013 : Unemployment Bulletin, 2010 : Vol 23, No.10 (October, 2011) An observation about corporate security departments : Slightly Skeptical Euromaydan Chronicles, June 2014 : Greenspan legacy bulletin, 2008 : Vol 25, No.10 (October, 2013) Cryptolocker Trojan (Win32/Crilock.A) : Vol 25, No.08 (August, 2013) Cloud providers as intelligence collection hubs : Financial Humor Bulletin, 2010 : Inequality Bulletin, 2009 : Financial Humor Bulletin, 2008 : Copyleft Problems Bulletin, 2004 : Financial Humor Bulletin, 2011 : Energy Bulletin, 2010 : Malware Protection Bulletin, 2010 : Vol 26, No.1 (January, 2013) Object-Oriented Cult : Political Skeptic Bulletin, 2011 : Vol 23, No.11 (November, 2011) Softpanorama classification of sysadmin horror stories : Vol 25, No.05 (May, 2013) Corporate bullshit as a communication method : Vol 25, No.06 (June, 2013) A Note on the Relationship of Brooks Law and Conway Law
History:
Fifty glorious years (1950-2000): the triumph of the US computer engineering : Donald Knuth : TAoCP and its Influence of Computer Science : Richard Stallman : Linus Torvalds : Larry Wall : John K. Ousterhout : CTSS : Multix OS Unix History : Unix shell history : VI editor : History of pipes concept : Solaris : MS DOS : Programming Languages History : PL/1 : Simula 67 : C : History of GCC development : Scripting Languages : Perl history : OS History : Mail : DNS : SSH : CPU Instruction Sets : SPARC systems 1987-2006 : Norton Commander : Norton Utilities : Norton Ghost : Frontpage history : Malware Defense History : GNU Screen : OSS early history
Classic books:
The Peter Principle : Parkinson Law : 1984 : The Mythical Man-Month : How to Solve It by George Polya : The Art of Computer Programming : The Elements of Programming Style : The Unix Hater’s Handbook : The Jargon file : The True Believer : Programming Pearls : The Good Soldier Svejk : The Power Elite
Most popular humor pages:
Manifest of the Softpanorama IT Slacker Society : Ten Commandments of the IT Slackers Society : Computer Humor Collection : BSD Logo Story : The Cuckoo's Egg : IT Slang : C++ Humor : ARE YOU A BBS ADDICT? : The Perl Purity Test : Object oriented programmers of all nations : Financial Humor : Financial Humor Bulletin, 2008 : Financial Humor Bulletin, 2010 : The Most Comprehensive Collection of Editor-related Humor : Programming Language Humor : Goldman Sachs related humor : Greenspan humor : C Humor : Scripting Humor : Real Programmers Humor : Web Humor : GPL-related Humor : OFM Humor : Politically Incorrect Humor : IDS Humor : "Linux Sucks" Humor : Russian Musical Humor : Best Russian Programmer Humor : Microsoft plans to buy Catholic Church : Richard Stallman Related Humor : Admin Humor : Perl-related Humor : Linus Torvalds Related humor : PseudoScience Related Humor : Networking Humor : Shell Humor : Financial Humor Bulletin, 2011 : Financial Humor Bulletin, 2012 : Financial Humor Bulletin, 2013 : Java Humor : Software Engineering Humor : Sun Solaris Related Humor : Education Humor : IBM Humor : Assembler-related Humor : VIM Humor : Computer Viruses Humor : Bright tomorrow is rescheduled to a day after tomorrow : Classic Computer Humor
The Last but not Least Technology is dominated by two types of people: those who understand what they do not manage and those who manage what they do not understand ~Archibald Putt. Ph.D
Copyright © 1996-2021 by Softpanorama Society. www.softpanorama.org was initially created as a service to the (now defunct) UN Sustainable Development Networking Programme (SDNP) without any remuneration. This document is an industrial compilation designed and created exclusively for educational use and is distributed under the Softpanorama Content License. Original materials copyright belong to respective owners. Quotes are made for educational purposes only in compliance with the fair use doctrine.
FAIR USE NOTICE This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available to advance understanding of computer science, IT technology, economic, scientific, and social issues. We believe this constitutes a 'fair use' of any such copyrighted material as provided by section 107 of the US Copyright Law according to which such material can be distributed without profit exclusively for research and educational purposes.
This is a Spartan WHYFF (We Help You For Free) site written by people for whom English is not a native language. Grammar and spelling errors should be expected. The site contain some broken links as it develops like a living tree...
|
|
You can use PayPal to to buy a cup of coffee for authors of this site |
Disclaimer:
The statements, views and opinions presented on this web page are those of the author (or referenced source) and are not endorsed by, nor do they necessarily reflect, the opinions of the Softpanorama society. We do not warrant the correctness of the information provided or its fitness for any purpose. The site uses AdSense so you need to be aware of Google privacy policy. You you do not want to be tracked by Google please disable Javascript for this site. This site is perfectly usable without Javascript.
Last modified: March 12, 2019
