CODEWITHSUNDEEP
awkgawk
Håkon Hægland
Håkon Hægland

Reputation: 40758

Sort an array of numbers in awk

How can I sort an array of numbers in awk? Consider "sortNum.awk" :

{
    split($0,a," ")
    for (i in a) print a[i]
    print "####"
    asort(a)
    for (i in a) print a[i]
}

Running with echo "4 3 2 1" | awk -f sortNum.awk gives

1
4
3
2
####
4
1
2
3

I am using GNU Awk version 3.1.8.

Upvotes: 2

Views: 3047

Answers (1)

Barmar
Barmar

Reputation: 781068

for (i in a) doesn't select the indexes in numeric order, you need to do that explicitly.

{
    n = split($0,a," ");
    for (i = 1; i <= n; i++) print a[i];
    print "####"
    asort(a)
    for (i = 1; i <= n; i++) print a[i];
}

Upvotes: 7

Related Questions