1*23f24377SWarner Losh{ x[$1] = $1 2*23f24377SWarner Losh delete x[$1] 3*23f24377SWarner Losh n = 0 4*23f24377SWarner Losh for (i in x) n++ 5*23f24377SWarner Losh if (n != 0) 6*23f24377SWarner Losh print "error", n, "at", NR 7*23f24377SWarner Losh} 8