I can see why you're puzzled, that took some thought.
Nothing at all is assigned to X. It's printing a newline. print "" would have the same effect, but they saved one character by using a blank variable. Just print all by itself with no parameters would print the entire line, not what you want.
The printf statements do not print newlines, those must be explicit when using printf. So it prints a bunch of things into one long line, then uses print "" to finish off the line.
Are you sure that's OFS,$i and not OFS $i ? Two things into a single %s is a syntax error as far as I know.
It isn't a syntax error, but it isn't common. The awk printf command:
uses the concatenation of "%s" and OFS as a format string; together they print the contents of the ith input field followed by the output field separator. If there is a bug here, it is that there is an extraneous trailing field separator printed at the end of each output line before the <newline> added by the print x command.
These 2 Users Gave Thanks to Don Cragun For This Post:
Hi,
Could anyone please explain why we have arr=1 - what does this statement do?
awk -F\; 'FNR==NR{arr=1;next};$3 in arr' core.txt gmrd.txt
Any help appreciated (2 Replies)
Hi all,
I have some code like this
awk -F, '{
if ($1==3)
print $2 > "output_file"
print "1" > "new_file"
}' "input_file"
When I check output_file this has the correct values in it. However the new_file has 1 in it for every line in the input_file. If the input file has 20 lins then... (2 Replies)
hi all
can any one help me to understand this
bdf -t vfxs | awk '/\//{printf("%-30s%-10s%-10s%-10s%-5s%-10s\n",$1,$2,$3,$4,$5,$6)}'
i want to understand the numbers %-30S% (4 Replies)
Hello,
I have recently come across this awk program. Can some one shed some light on what is taking place.
awk '{!a++}END{for(i in a) if ( a >10 ) print a,i }' $FILE
Best Regards,
jaysunn (1 Reply)
Hi,
I am using awk statement to extract data from a file and write a new file with certain columns rearranged and few hard coded values added to new file.
Now i need to add a column with sysdate. can i do that inside the awk print statement?
Now:
nawk ' /^3/ BEGIN {FS=","}... (2 Replies)
Hello,
is there a way to use the awk print statement on two files at once? I would like to take two columns from one file, and one column from another file and print them as consecutive columns to a third file. Seems simple...as in:
file 1
1 a
2 b
3 c
4 d
5 e
file 2
1 t
2 u... (3 Replies)
I have a file1.txt
file1.txt
F-120009210","Felix","U-M-F-F-F-","white","yes","no","U-M-F-F-F-","Bristol","RI","true"
F-120009213","Fluffy","U-F-","white","yes","no","M-F-","Warwick","RI","true"
U-120009217","Lity","U-M-","grey","yes","yes","","Fall River","MA","true"... (4 Replies)
Hi folks,
I have a scenario to convert the update statements into insert statements using shell script (awk, sed...) or in database using regex.
I have a bunch of update statements with all columns in a file which I need to convert into insert statements.
UPDATE TABLE_A SET COL1=1 WHERE... (0 Replies)
Discussion started by: dev123
0 Replies
LEARN ABOUT CENTOS
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)