ltsv.awk

#!/usr/bin/nawk -f
BEGIN {
	FS="\t"
}
{
	for (i in hash)
		delete hash[i]
	for (i = 1; i <= NF; i++) {
		sep = index($i, ":")
		key = substr($i, 1, sep - 1)
		val = substr($i, sep + 1, length($i) - sep)
		hash[key] = val
	}

	for (i in hash)
		print i "=" hash[i]
	print "------------"
}