So I've got problem which continues on my previous one (from few months ago: unix.com/shell-programming-scripting/171764-delete-duplicate-lines-twist.html ).
Good, proven, working solutions for that old problem are those:
Code:
awk '{cur=$0; gsub(/[^[:alnum:]]/, "", cur); if (!a[tolower(cur)]++) print}'
and
Code:
awk '{s=tolower($0);gsub("[^[:alnum:]]","",s);x[s]=$0} END {for(i in x) print x[i]}'
These 2 approaches yield same results (but with different final order of lines, which is really unimportant for me).
These lines (any of them) are also, what I need modified now to work a little different, and that is purpose of this new topic:
I now don't need awk (in his search for duplicate lines in file) to consider and compare whole lines anymore. But only first parts of lines until it reaches character '*' (asterisk). Asterisk is separator in my file and everything that comes after asterisk, awk should not bother with (its like he got to end of the line). Asterisk occurs in every line in file but sometimes there is more then one per line (this should not confuse awk, and he should still take into account only first part of line, until first asterisk appears.
If someone can make good solution for this would save me week of work... also eternal gratitude from me
Hi,
I came to know that using awk '!x++' removes the duplicate lines. Can anyone please explain the above syntax. I want to understand how the above awk syntax removes the duplicates.
Thanks in advance,
sudvishw :confused: (7 Replies)
Hi,
I'm trying to create an XML sitemap of our dynamic ecommerce sites SEO Friendly URLs and am trying to create the initial page listing.
I have a CSV file that looks like the following and need duplicate the lines based on a value which needs calculating.
... (2 Replies)
Hello again, I am wanting to remove all duplicate blocks of XML code in a file. This is an example:
input:
<string-array name="threeItems">
<item>item1</item>
<item>item2</item>
<item>item3</item>
</string-array>
<string-array name="twoItems">
<item>item1</item>
<item>item2</item>... (19 Replies)
Hi,
I have a file with date in it like:
UserString1
UserString2
UserString3
UserString4
UserString5
I need two entries for each line so it reads like
UserString1
UserString1
UserString2
UserString2
etc. Can someone help me with the awk command please?
Thanks (4 Replies)
Hello,
I am new to Linux environment , I working on Linux script which should send auto email based on the specific condition from log file. Below is the sample log file
Name m/c usage
abc xxx 10
abc xxx 20
abc xxx 5
xyz ... (6 Replies)
Hi experts, I have a tab-delimited file with one column containing values separated by a comma. I wish to duplicate the entire line for every value in that comma-delimited field.
For example:
$cat file
4444 4444 4444 4444
9990 2222,7777 6666 2222 ... (3 Replies)
I create a CGI in bash/html.
My awk script looks like :
echo "<table>"
for fn in /var/www/cgi-bin/LPAR_MAP/*;
do
echo "<td>"
echo "<PRE>"
awk -F',|;' -v test="$test" '
NR==1 {
split(FILENAME ,a,"");
}
$0 ~ test {
if(!header++){
... (12 Replies)
Discussion started by: Tim2424
12 Replies
LEARN ABOUT LINUX
igawk
IGAWK(1) Utility Commands IGAWK(1)NAME
igawk - gawk with include files
SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ...
igawk [ all gawk options ] [ -- ] program-text file ...
DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1).
AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like
@include getopt.awk
in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path.
OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports.
EXAMPLES
cat << EOF > test.awk
@include getopt.awk
BEGIN {
while (getopt(ARGC, ARGV, "am:q") != -1)
...
}
EOF
igawk -f test.awk
SEE ALSO gawk(1)
Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995.
AUTHOR
Arnold Robbins (arnold@skeeve.com).
Free Software Foundation Nov 3 1999 IGAWK(1)
03-11-2012
Awk and duplicate lines - little complicated
