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Full Discussion: awk - if else condition
Top Forums UNIX for Dummies Questions & Answers awk - if else condition Post 302894584 by CarloM on Wednesday 26th of March 2014 08:39:18 AM
Old 03-26-2014
Quote:
Originally Posted by vegasluxor
Thanks a lot. Could you please explain logic as well?
print is not used here then how come it is printing whole line? What if i want to print specific columns only?
  1. -F "," - use comma as the field separator
  2. $4 != "CAR" {$4 = "BIKE"} - if field 4 is not 'CAR' then set field 4 to BIKE (note that this will replace anything that isn't CAR, not just empty ones)
  3. 1 - always TRUE (which matches every input line and prints it, since that's the default action)
  4. OFS="," - use comma as the output field separator

EDIT: If you only want to print specific fields you could change (3) to (e.g.):
Code:
{print $1 OFS $4}

to just print fields 1 and 4.

Last edited by CarloM; 03-27-2014 at 06:48 AM..
This User Gave Thanks to CarloM For This Post:
 

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DBF_DUMP(1p)						User Contributed Perl Documentation					      DBF_DUMP(1p)

NAME
dbf_dump - Dump the record of the dbf file FORMAT
dbf_dump [options] files where options are --rs output record separator (default newline) --fs output field separator (default colon) --fields comma separated list of fields to print (default all) --undef string to print for NULL values (default empty) --memofile specifies unstandard name of attached memo file --memosep separator for dBase III dbt's (default x1ax1a) --nomemo do not try to read the memo (dbt/fpt) file --info print info about the file and fields with additional --SQL parameter, outputs the SQL create table --version print version of the XBase library --table output in nice table format (only available when Data::ShowTable is installed, overrides rs and fs) SYNOPSIS
dbf_dump -fields id,msg table.dbf dbf_dump -fs=' : ' table dbf_dump --nomemo file.dbf ssh user@host 'cat file.dbf.gz' | gunzip - | dbf_dump - DESCRIPTION
Dbf_dump prints to standard output the content of dbf files listed. By default, it prints all fields, separated by colons, one record on a line. The output record and column separators can be changed by switches on the command line. You can also ask only for some fields to be printed. The content of associated memo files (dbf, fpt) is printed for memo fields, unless you use the "--nomemo" option. You can specify reading the standard input by putting dash (-) instead of file name. AVAILABLE FROM
http://www.adelton.com/perl/DBD-XBase/ AUTHOR
(c) 1998--2011 Jan Pazdziora. SEE ALSO
perl(1); XBase(3pm); index_dump(1p) perl v5.12.4 2011-08-31 DBF_DUMP(1p)
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