All possible combinations


 
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# 1  
Old 07-25-2012
All possible combinations

Hi,

I have an input file like this

Code:
a
b
c
d

I want to print all possible combinations between these records in the following way

Code:
aVSb
aVSc
aVSd
bVSc
bVSd
cVSd

VS indicates versus. All thoughts are appreciated.

Thanks
# 2  
Old 07-25-2012
# 3  
Old 07-25-2012
I am novice in Perl. Do you have any other suggestions in awk or other bash scripting
# 4  
Old 07-25-2012
Well... How about Perl without any modules?
Code:
perl -nle 'push @x,$_;END{while ($#x>0) {for $i (@x[1..$#x]) {print "$x[0]VS$i";}shift @x}}' file

This User Gave Thanks to bartus11 For This Post:
# 5  
Old 07-25-2012
Code:
join -12 -22 -o1.1,2.1 file file | awk '$1 < $2 { print $1"VS"$2 }'

Regards,
Alister
This User Gave Thanks to alister For This Post:
# 6  
Old 07-26-2012
Arbitrary permutation and combination script
https://www.unix.com/shell-programmin...on-script.html
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