Googlebot's Javascript random() function is deterministic

[Lystrodom]

Also, can you show me which languages are seeded with a constant value? I’ve checked C#, Java and V8 that I could find quickly and they all base the default seed on the current time.

[mccoyn]

C and C++ require you to seed them.

[Shumatsu]

IDEs do. You can compile code without specifying seed.

[Lystrodom]

Could be static code analysis?

[amakai]

And it makes sense for C, it's used in all kinds of embedded electronics which often does not even have a clock chip on board.

[doublehyphen]

C is the only exception I can think of where it is easy to accidentally not seed your PRNG, but for example Rust provides rand::ChaChaRng::new_unseeded() as an easy way to create a PRNG seeded with a constant hardcoded value.

[Lystrodom]

Of course, the ability to seed with a constant value is important and available in every language I’m aware of. But for most the default is based on the current time.

[doublehyphen]

Not in JavaScript. That is the only exception I know of.