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sed and grep
Post 302792891 by versd on Thursday 11th of April 2013 09:25:32 AM
04-11-2013
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I am really lost I don't know what this line does. Please help I'm very lost. Thanks in advance.
cat CPROGRAMS.c
|sed 's// /g'|tr ' ' '\012'
|grep ''
|sed 's/^*/ /'
|grep '($'|sort -u|tr -d "("` (4 Replies)
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---
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LEARN ABOUT DEBIAN
txt2regex
TXT2REGEX(1) General Commands Manual TXT2REGEX(1) NAME
txt2regex - a Regular Expression Wizard, written with bash2 builtins SYNOPSIS
txt2regex txt2regex --nocolor|--whitebg txt2regex --all|--prog <p1,p2,...,pN> txt2regex --showmeta|--showinfo <program> txt2regex --make <target> txt2regex --history <value> DESCRIPTION
txt2regex is a Regular Expression "wizard", all written with bash2 builtins, that converts human sentences to regexes. With a simple interactive interface, you just answer to questions and build your own regex for a large variety of programs, like awk, emacs, grep, perl, php, procmail, python, sed and vim. There are more than 20 supported programs. It's bash so download and run, no compilation needed. Please visit the program homepage at http://txt2regex.sf.net. OPTIONS
--all works with all registered programs --help prints the help message and quit --history <value> prints to STDOUT a regex from a history data --make <target> prints a ready regex for a common pattern --nocolor self-explanatory --prog <p1,p2,...> choose which programs to use (separated by commas) --showinfo <program> prints regex info about the program --showmeta prints a complete metachar table for all programs --version prints the program version and quit --whitebg colors adjusted to white background terminals By default, all options are turned OFF. Just call it with no options to launch the default interactive interface. DETAILS
--all is cool but requires lots of lines (~35) --nocolor is strong, so it kills --whitebg --showmeta rules, try it --showinfo uses reverse video output, --nocolor turns it off --history is getting useful, stay tunned --make is a remedy for headaches --prog is nice to use your favorite programs, mix it with --make and --history EXAMPLES
Calling the program on the default interactive interface $ txt2regex Calling the program on a white terminal $ xterm -fg black -bg white ; txt2regex --whitebg Getting information $ txt2regex --showmeta Getting specific information $ txt2regex --showinfo sed Calling it for specific programs $ txt2regex --prog vim,sed,grep,python Applying a history data $ txt2regex --history '16421x:01x:' Getting ready regexes! $ txt2regex --make hour $ txt2regex --make number3 --prog perl $ txt2regex --make date2 --all INTERFACE
The program interface is simple and easy to use. This is its contents: +---------------------------------------+ | -> Top menu | | -> Group menu | | | | -> Regexes of the programs selected | | ... | | ... | | | | -> History | | -> Your prompt | | | | -> The question | | -> The answers | | ... | | ... | +---------------------------------------+ All the basic commands can be used on the numeric pad on the keyboard, but remember to turn ON the NumLock key. Command Description . Quit the program (with confirmation) 0 Reset the Regular Expression 1-9 Answers the questions * Toggles color ON/OFF / Add/remove programs on/from the list | Insert an alternation (where allowed) ( Open a new group (where allowed) ) Close the opened group (if any) BUGS
Bug reports and contributions are VERY welcome! Please send them to the author. AUTHOR
Written and maintained by Aurelio Marinho Jargas <verde@aurelio.net> COPYRIGHT
Copyright (C) 2000, 2001, 2002, 2003, 2004 Aurelio Marinho Jargas This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. September, 28th - 2004 TXT2REGEX(1)