awk displaying duplicates

[grapes12]

awk command displays duplicates

awk 'BEGIN {while ( getline < "sun5-printers.txt") {arr[$0]++ } } { if (!($0 in a
rr ) ) { print } }' sun8-printers.txt > diffs.txt

or is it my do command:

for i in `cat diffs.txt`
do
   printer="$(awk -F: '{print $1}' | cut -c11-18 diffs.txt)"
   echo $printer
done

herewith is the output run with ksh -x:

+ cat diffs.txt
+ + cut -c11-18 diffs.txt
+ awk -F: {print $1}
printer= 0117bd1
 2201bl7
 5001bl1
+ echo 0117bd1 2201bl7 5001bl1
0117bd1 2201bl7 5001bl1
+ + cut -c11-18 diffs.txt
+ awk -F: {print $1}
printer= 0117bd1
 2201bl7
 5001bl1
+ echo 0117bd1 2201bl7 5001bl1
0117bd1 2201bl7 5001bl1
+ + cut -c11-18 diffs.txt
+ awk -F: {print $1}
printer= 0117bd1
 2201bl7
 5001bl1
+ echo 0117bd1 2201bl7 5001bl1
0117bd1 2201bl7 5001bl1

 

[grapes12]

I resolved the problem.
removed the for i statement
and only used the
printer_list as a variable

printer_list="$(awk -F: '{print $1}' diffs.txt | cut -c11-18)"
echo $printer

No-more duplicates