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Full Discussion: Head and Tail in One Line
Top Forums Shell Programming and Scripting Head and Tail in One Line Post 302131578 by 33junaid on Sunday 12th of August 2007 11:32:15 AM
Old 08-12-2007
Head and Tail in One Line

I am new to UNIX......I have one file which contains thousnads of records with header and tailer.

Header
Record 1
Record 2
....
....
Last Record
Trailer

I want to concatenate Header and Trailer in the first line....now the output should look like this:

Header: Header value, Trailer: Trailer Value
Record 1
Record 2
....
....
Last Record

I used this command to get the trailer from file:
tail -1 output_file

But not getting logic to further do.....can anybody pls complete this script.......thanks....
 

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Jifty::Action::Record::Update(3pm)			User Contributed Perl Documentation			Jifty::Action::Record::Update(3pm)

NAME
Jifty::Action::Record::Update - Automagic update action DESCRIPTION
This class is used as the base class for Jifty::Actions that are merely updating Jifty::Record objects. To use it, subclass it and override the "record_class" method to return the name of the Jifty::Record subclass that this action should update. METHODS
arguments Overrides the "arguments" in Jifty::Action::Record method to further specify that all of the primary keys must have values when submitted; that is, they are constructors. validate_arguments We only need to validate arguments that got submitted -- thus, a mandatory argument that isn't submitted isn't invalid, as it's not going to change the record. This is opposed to the behavior inherited from Jifty::Action, where mandatory arguments must be present for the action to run. However, constructor arguments are still required. take_action Overrides the virtual "take_action" method on Jifty::Action to call the appropriate "Jifty::Record"'s "set_" methods when the action is run, thus updating the object in the database. report_success Sets the "message" in Jifty::Result to default success message, "Updated". Override this if you want to report some other more user- friendly result. possible_columns Update actions do not provide fields for columns marked as "private" or "protected". _extra_validator_args Passes "for => 'update'" to validators. _extra_canonicalizer_args Passes "for => 'update'" to canonicalizers. _extra_autocompleter_args Passes "for => 'update'" to autocompleters. SEE ALSO
Jifty::Action::Record, Jifty::Record LICENSE
Jifty is Copyright 2005-2010 Best Practical Solutions, LLC. Jifty is distributed under the same terms as Perl itself. perl v5.14.2 2011-02-10 Jifty::Action::Record::Update(3pm)
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