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knightpop/TaggedTypeMistake.sc

Last active September 9, 2017 17:57
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TaggedTypeMistake.sc
val userId: Long = 12
val deviceUuid: Long = 1234
val carSerialId: Long = 12345
def getHashCode(
userId: Long,
deviceUuid: Long,
carSerialId: Long
): String = {
val userIdPlus: Long = userId + 1
val deviceUuidPlus: Long = deviceUuid + 2
val carSerialIdPlus: Long = carSerialId + 3
s"$userIdPlus-$deviceUuidPlus-$carSerialIdPlus"
}
getHashCode(userId, deviceUuid, carSerialId) // Right Answer = res0: String = 13-1236-12348
getHashCode(deviceUuid, userId, carSerialId) // Wrong Answer = res1: String = 1235-14-12348
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