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Full Discussion: CSV File parse help in Perl
Top Forums Shell Programming and Scripting CSV File parse help in Perl Post 302180064 by era on Saturday 29th of March 2008 12:50:58 PM
Old 03-29-2008
That's a somewhat idiosyncratic script, I'm not sure which parts are suitable for a person of your age.

(2, 3, 6) is a list. Map takes the function you give it and applies it to each item on the list in turn, and returns the result as a new list. Within map, $_ refers to the current item. So the map returns $F[2] followed by $F[3] followed by $F[6]. The rest is just formatting.

Oh, the final crucial point is the option -a (mnemonic: more like awk) which says to split the input into @F and, -F "\t" which says to do that splitting on the tab character.
Last edited by era; 03-29-2008 at 02:19 PM..
 

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LEARN ABOUT OPENDARWIN

consolemessage

ConsoleMessage(8)					    BSD System Manager's Manual 					 ConsoleMessage(8)

NAME

     ConsoleMessage -- Send a message to SystemStarter

SYNOPSIS

     ConsoleMessage [-v] message
     ConsoleMessage [-v] -S
     ConsoleMessage [-v] -F
     ConsoleMessage [-v] -s service
     ConsoleMessage [-v] -f service
     ConsoleMessage [-v] -q setting
     ConsoleMessage [-v] -b path
     ConsoleMessage [-v] -u

DESCRIPTION

     The ConsoleMessage utility may be used by startup item scripts to send messages to SystemStarter (see SystemStarter(8)).

     The default behavior is to send the specified message to SystemStarter to be displayed on the console.  SystemStarter will attempt to local-
     ize the string using the current startup item's localization dictionaries.

     ConsoleMessage may also be used to give feedback to SystemStarter indicating which services provided by the startup item have succeeded or
     failed.

OPTIONS

     -v       verbose mode (prints errors to stdout)

     -S       mark all services provided by this item as successful

     -F       mark all services provided by this item as failed

     -s       mark the service as successful

     -f       mark the service as failed

     -q       query SystemStarter for the value of the configuration variable setting (result will be printed to stdout).

     -b       Tell SystemStarter to load the display bundle at the specified path

     -u       Tell SystemStarter to unload the current display bundle

NOTES

     When a service name is not specified, ConsoleMessage assumes its parent process identification (see getppid(2)) is that of a startup item
     script, and uses that token to find the correct list of services provided by the current item. If the process calling ConsoleMessage is not a
     startup item script, it is necessary to explicitly provide service names.

SEE ALSO

     SystemStarter(8)

     http://www.opensource.apple.com/projects/documentation/howto/html/SystemStarter_HOWTO.html

HISTORY

     The ConsoleMessage utility appeared in Darwin 6.0

Darwin								  April 12, 2002							    Darwin
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