uuid Archives - IT Nursery

Java, Programming

IT Nursery

Efficient method to generate UUID String in Java (UUID.randomUUID().toString() without the dashes)

I would like an efficient utility to generate unique sequences of bytes. UUID is a good candidate but UUID.randomUUID().toString() generates stuff like 44e128a5-ac7a-4c9a-be4c-224b6bf81b20 ...

June 1, 2022
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ios, Programming

IT Nursery

How to get a unique device ID in Swift?

How can I get a device’s unique ID in Swift? I need an ID to use in the database and as the API-key ...

May 31, 2022
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ios, Programming

IT Nursery

How to create a GUID/UUID using iOS

I want to be able to create a GUID/UUID on the iPhone and iPad. The intention is to be able to create keys ...

May 29, 2022
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Likelihood of collision using most significant bits of a UUID in Java

If I’m using Long uuid = UUID.randomUUID().getMostSignificantBits() how likely is it to get a collision. It cuts off the least significant bits, so ...

May 24, 2022
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When should I use uuid.uuid1() vs. uuid.uuid4() in python?

I understand the differences between the two from the docs. uuid1(): Generate a UUID from a host ID, sequence number, and the current ...

May 22, 2022
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Advantages and disadvantages of GUID / UUID database keys

I’ve worked on a number of database systems in the past where moving entries between databases would have been made a lot easier ...

May 21, 2022
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PHP function to generate v4 UUID

So I’ve been doing some digging around and I’ve been trying to piece together a function that generates a valid v4 UUID in ...

May 18, 2022
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How good is Java’s UUID.randomUUID?

I know that randomized UUIDs have a very, very, very low probability for collision in theory, but I am wondering, in practice, how ...

May 13, 2022
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How to test valid UUID/GUID?

How to check if variable contains valid UUID/GUID identifier? I’m currently interested only in validating types 1 and 4, but it should not ...

May 11, 2022
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Which UUID version to use?

Which version of the UUID should you use? I saw a lot of threads explaining what each version entails, but I am having ...

May 7, 2022
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