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Full Discussion: Those simple one liners
The Lounge What is on Your Mind? Those simple one liners Post 302791537 by ahamed101 on Monday 8th of April 2013 04:32:40 PM
Old 04-08-2013
Those simple one liners

I wanted to say LOL and punch my face when I saw post#11 (where Don_Cragun even reduced the string manipulation with a simple regex) in the thread https://www.unix.com/shell-programmin...ilename-2.html

I mean, when things can be done with just a one liner, sometimes I tend to forgot those simple things and go for unwanted iterations.

Does this happen to you? You write a 10 liner and "HE" comes in with a one liner and you will be like "what?". Can't agree if someone says it cause of experience not in this case at least. May be our brain misses something sometimes and thinks too complex?

--ahamed
 

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XMLCATALOG(1)							 xmlcatalog Manual						     XMLCATALOG(1)

NAME
xmlcatalog - Command line tool to parse and manipulate XML or SGML catalog files. SYNOPSIS
xmlcatalog [--shell | --create | --add type orig replace | --del values | --noout | --verbose] [catalogfile] [entities] INTRODUCTION
xmlcatalog is a command line application allowing users to monitor and manipulate XML and SGML catalogs. It is included in libxml2. Its functions can be invoked from a single command from the command line, or it can perform multiple functions in interactive mode. It can operate on both XML and SGML files. COMMAND LINE OPTIONS
--shell filename Run a shell allowing interactive queries on catalog file filename. --create filename Create a new XML catalog. Outputs to stdout, ignoring filename unless --noout is used, in which case it creates a new catalog file filename. --add 'type' 'orig' 'replace' filename Add an entry to catalog file filename. type indicates the type of entry. Possible types are 'public', 'system', 'rewriteSystem', 'delegatePublic', 'delegateSystem'amd 'rewriteURI'. 'orig' is the original reference to be replaced, and 'replace' is the URI of the replacement entity to be used. The --add option will not overwrite filename, outputing to stdout, unless --noout is used. The --add will always take three parameters even if some of the XML catalog constructs will have only a single argument. If the --add option is used following the --sgml option, only a single argument, a filename, is used. This is used to add the name of a catalog file to an SGML supercatalog, a file that contains references to other included SGML catalog files. --del 'values' filename Remove entries from the catalog file filename matching 'values'. The --del option will not overwrite filename, outputing to stdout, unless --noout is used. --noout Save output to the named file rather than outputing to stdout. --sgml Uses SGML Super catalogs for --add and --del options -v or --verbose output debugging information. SHELL COMMANDS
Invoking xmlcatalog with the --shell filename option opens a command line shell allowing interactive access to the catalog file identified by filename. Invoking the shell provides a command line prompt after which commands can be entered. public 'PublicID' Execute a public identifier lookup of the catalog entry for 'PublicID'. The corresponding entry will be output to the command line. system 'SystemID' Execute a public identifier lookup of the catalog entry for 'SystemID'. The corresponding entry will be output to the command line. add 'type' 'orig' 'replace' Add an entry to the catalog file. type indicates the type of entry. Possible types are 'public', 'system', 'rewriteSystem', 'dele- gatePublic' and 'delegateSystem'. 'orig' is the original reference to be replaced, and 'replace' is the URI of the replacement entity to be used. del 'values' Remove the catalog entry corresponding to 'values'. dump Print the current catalog. debug Print debugging statements showing the steps xmlcatalog is executing. quiet Stop printing debugging statements. exit Quit the shell. RETURN VALUES
xmlcatalog's return codes provide information that can be used when calling it from scripts. 0: normal 1: Failed to remove an entry from the catalog 2: Failed to save to the catalog, check file permissions 3: Failed to add an entry to the catalog 4: Failed to lookup and entry in the catalog REFERENCES
libxml web page: http://www.xmlsoft.org/ libxml catalog support web page:: http://www.xmlsoft.org/catalog.html James Clark's SGML catalog page:: http://www.jclark.com/sp/catalog.htm OASIS XML catalog specification: : http://www.oasis-open.org/committees/entity/spec.html AUTHOR
John Fleck. XMLCATALOG(1)
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