I think your main impediment is you need to know how awk script work:
Every awk-script consists of three parts (although each part is optional): the first part is marked with BEGIN and is executed before the first line of the input is read. The second part is not marked with a name and is executed every time a line of input is read. The last part is named END and is executed after the last line of input is read.
For instance:
Code:
awk 'BEGIN {
printf( "Here we start.\n" );
}
{
print;
}
END {
printf( "Here it ends.\n" );
}' /path/to/input
This will print the input file unaltered (the single "print" command in the middle does that), surrounded by "Here we start" at the top (the effect of the BEGIN clause) and "Here it ends" at the bottom (the effect of the END clause).
Your original script printed "no duplicates" several times because the process - deciding upon printing it or not, then printing it eventually - was done for every line over and over. Dons script worked because he put that into the END-part and just manipulated a flag without printing anything in the main part.
You should be able with this to change his script into doing whatever you want it to do.
hi there
I'm getting a string from a sqlplus query, and I need to compare it with another string
Problem here, is that the string i get from query brings a 'carriage return' with it, and comparing throws always false value.
i need to delete all carriage retun charactres in string.
how... (6 Replies)
Hi friends
I need to return string value in functions
can anyone help me out to return string values rather than integer.
#!/bin/bash
add_a_user()
{
USER=$1
COMPANY=$2
shift; shift;
echo "Adding user $USER ..."
echo "$USER working in $COMPANY ..."
ret_type=YES
return... (1 Reply)
Hi there
i have a script which will create unix user accounts. Id like to validate the entered string so that it is specifically 8 characters or less and consists of only ! not
Is there a way to validate a string against a regular expression.. i.e
size=`printf "$var | wc -m`
... (1 Reply)
I have a folder of scripts:
bash:/folderpath/> ls
beginFile.sh
beginFileBackup.sh
beginAnother.sh
beginAnotherBackup.sh
beginJunk.sh
beginJunkBackup.sh
I'd like to be able to call just one (beginFile.sh) using this type of scheme:
#Run the beginFile script without the word "Backup" in... (1 Reply)
function blah {
return "string"
}
it keeps saying string: not found
How can i do this guys? Because I'm trying to do something like this
function print_daemon_options {
echo "Start Daemons - Please enter one or a combination of the following:"
if isDatasubEnabled &&... (11 Replies)
Gurus,
I have a files from where lines are like following
<ns0:ccid>123456789</ns0:ccid>
<ns0:ccid>1234
56789</ns0:ccid>
I would like to grep any number which will be as below (with carrige return): As 123456789 any number so I have to use the regular expression
<ns0:ccid>1234... (3 Replies)
Hello,
Awk seem treat the pattern as regular expression, how can awk search not using regular expression? e.g. just represent for "", not "A" or "a" . I don't want to add backslash . (2 Replies)
here is what i want to achieve... consider a file contains below contents. the file size is large about 60mb
cat dump.sql
INSERT INTO `table1` (`id`, `action`, `date`, `descrip`, `lastModified`) VALUES (1,'Change','2011-05-05 00:00:00','Account Updated','2012-02-10... (10 Replies)
Hi,
temp="/usr=25,/usr/lib=12"
How to get only dir names with out values.
I tried like below but no use.
tmp=${temp##*,}
echo $tmp
o/p:
/usr/lib=12
expected o/p:
/usr /usr/lib ---> in array (13 Replies)
Hi,
I am writing a script in awk trying to replace strings that are math expressions with their result.
For example, I have a file that looks like this:
5-1
32/8-1
4*12
17+1-3
I would like to get the following output:
4
3
48
15
I tried doing it the following way (using the "bc"... (8 Replies)
Discussion started by: avi.levi
8 Replies
LEARN ABOUT CENTOS
end
END(7) PostgreSQL 9.2.7 Documentation END(7)NAME
END - commit the current transaction
SYNOPSIS
END [ WORK | TRANSACTION ]
DESCRIPTION
END commits the current transaction. All changes made by the transaction become visible to others and are guaranteed to be durable if a
crash occurs. This command is a PostgreSQL extension that is equivalent to COMMIT(7).
PARAMETERS
WORK, TRANSACTION
Optional key words. They have no effect.
NOTES
Use ROLLBACK(7) to abort a transaction.
Issuing END when not inside a transaction does no harm, but it will provoke a warning message.
EXAMPLES
To commit the current transaction and make all changes permanent:
END;
COMPATIBILITY
END is a PostgreSQL extension that provides functionality equivalent to COMMIT(7), which is specified in the SQL standard.
SEE ALSO BEGIN(7), COMMIT(7), ROLLBACK(7)PostgreSQL 9.2.7 2014-02-17 END(7)