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Full Discussion: combining two files
Top Forums UNIX for Dummies Questions & Answers combining two files Post 302241495 by radoulov on Monday 29th of September 2008 01:41:01 PM
Old 09-29-2008
Quote:
NR == FNR this condition I am little confused..
While reading the first non-empty input file (NR == FNR)[...]
If you run a simple:

Quote:
man awk|grep -E 'F?NR'
FNR The input record number in the current input file.
NR The total number of input records seen so far.
...
So, consider the following:

Code:
$ repeat 3 print line$((++i))>>file{1..2}
$ head file[12]
==> file1 <==
line1
line2
line3

==> file2 <==
line1
line2
line3
$ awk '{ 
  printf "filename is: %s, NR is %d,\
  FNR is %d,\
  $0 is %s,\
  NR == FNR: true/false --> %s\n",
  FILENAME,
  NR,
  FNR,
  $0,
  NR == FNR?"true":"false"
}' file[12]
filename is: file1, NR is 1,  FNR is 1,  $0 is line1,  NR == FNR: true/false --> true
filename is: file1, NR is 2,  FNR is 2,  $0 is line2,  NR == FNR: true/false --> true
filename is: file1, NR is 3,  FNR is 3,  $0 is line3,  NR == FNR: true/false --> true
filename is: file2, NR is 4,  FNR is 1,  $0 is line1,  NR == FNR: true/false --> false
filename is: file2, NR is 5,  FNR is 2,  $0 is line2,  NR == FNR: true/false --> false
filename is: file2, NR is 6,  FNR is 3,  $0 is line3,  NR == FNR: true/false --> false

 

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LEARN ABOUT DEBIAN

jifty::web::session::none

Jifty::Web::Session::None(3pm)				User Contributed Perl Documentation			    Jifty::Web::Session::None(3pm)

NAME

       Jifty::Web::Session::None - A null session handler for jifty

DESCRIPTION

       Jifty depends on its sessions to keep users logged in, to store continuations and to allow developers to store user-specific data.  In
       general, you don't want to disable them. But sometimes, the development benefits of Jifty lead you to build applications that genuinely
       don't want per-user sessions. That's where "Jifty::Web::Session::None" comes in. By specifying that you want to use
       "Jifty::Web::Session::None" as your Jifty session handler, you tell Jifty to avoid ever reading, writing or storing a user session.  No
       cookies get set. Nothing gets stored in the database.

USAGE

       In your "etc/config.yml":

	---
	framework:
	  Web:
	    SessionClass:: Jifty::Web::Session::None

METHODS

       All methods in this class are dummy methods which do no work. This class mocks the API provided by "Jifty::Web::Session".

   new
       Takes no arguments. Returns a Jifty::Web::Session::None.

   id
       Returns false.

   create
       Returns true.

   load
       Returns true.

   unload
       Returns true.

   loaded
       Returns true.

   get
       Returns false.

   set
       Returns false.

   remove
       Returns true.

   set_continuation
       Returns false.

   get_continuation
       Returns false.

   remove_continuation
       Returns false.

   continuations
       Returns false.

   set_cookie
       Returns false.

   cookie_name
       Returns false.

   expires
       Returns false.

perl v5.14.2							    2010-09-25					    Jifty::Web::Session::None(3pm)
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