github.com/benhoyt/goawk@v1.8.1/testdata/t.intest2 (about)

     1  {
     2  	line = substr($0, index($0, " "))
     3  	print line
     4  	n = split(line, x)
     5  	x[$0, $1] = $0
     6  	print x[$0, $1]
     7  	print "<<<"
     8  for (i in x) print i, x[i]
     9  	print ">>>"
    10  	if (($0,$1) in x)
    11  		print "yes"
    12  	if ($1 in x)
    13  		print "yes"
    14  	else
    15  		print "no"
    16  }