shithub: kwa

ref: 8f2d3879a9c66d2633ca7ec1c3b0495981feb04f
dir: /test/t.array1/

{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]])
}