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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 trouble figuring out what's best for what applications. ...
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Generating v5 UUID. What is name and namespace?

... and namespace can be used to create a hierarchy of (very probably) unique UUIDs. Roughly speaking, a type 3 or type 5 UUID is generated by hashing together a namespace identifier with a name. Type 3 UUIDs use MD5 and type 5 UUIDs use SHA1. Only 128-bits are available and 5 bits are used to specify...
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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 which is good, but I would prefer dash-less string. ...
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When are you truly forced to use UUID as part of the design?

I don't really see the point of UUID . I know the probability of a collision is effectively nil , but effectively nil is not even close to impossible. ...
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Example of UUID generation using Boost in C++

I want to generate just random UUID's, as it is just important for instances in my program to have unique identifiers. I looked into Boost UUID , but I can't manage to generate the UUID because I don't understand which class and method to use. ...
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Is there a method to generate a UUID with go language

...urns random bytes in the range 0-255, which are not all valid values for a UUID. As far as I can tell, this should be done for all the values in the slice though. If you are on linux, you can alternatively call /usr/bin/uuidgen. package main import ( "fmt" "log" "os/exec" ) func main...
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Generating a UUID in Postgres for Insert statement?

My question is rather simple. I'm aware of the concept of a UUID and I want to generate one to refer to each 'item' from a 'store' in my DB with. Seems reasonable right? ...
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How unique is UUID?

How safe is it to use UUID to uniquely identify something (I'm using it for files uploaded to the server)? As I understand it, it is based off random numbers. However, it seems to me that given enough time, it would eventually repeat it self, just by pure chance. Is there a better system or a patter...
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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 good Java's randomUUID() is in terms of not having collision? Does anybody have any experience to share? ...
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I need to generate uuid for my rails application. What are the options(gems) I have? [duplicate]

...dditional dependencies and use SecureRandom which is builtin: SecureRandom.uuid #=> "1ca71cd6-08c4-4855-9381-2f41aeffe59c" See other possible formats here. share | improve this answer |...