shithub: trueawk

ref: d7f37646965ee26214da0e1d97f3c1d54349ae2d
dir: /testdir/t.array1/

View raw version 
{for(i=1; i<=NF; i++) {
	if (x[$i] == "")
		y[++n] = $i
	x[$i]++
 }
}
END {
	for (i=0; i<n; i++)
		print (y[i], x[y[i]])
}