在awk中对数字数组进行排序

Question

如何在awk中对数组进行排序？考虑“sortNum.awk”：

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

使用echo "4 3 2 1" | awk -f sortNum.awk运行

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

我正在使用GNU Awk版本3.1.8。

Answer 1

for (i in a)不按数字顺序选择索引，您需要明确地执行此操作。

{
    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];
}