How to implement floating point 36 credit conversion


i want to achieve this js code in rust .
but I don't know how to translate float point by 36 credit

i found this library of radix_fmt
but not support f64

I don't understand what you mean by "credit". All this code seems to do is take a random number between 0 and 1 and output a base-36 string representation of it. The JS implementation I have access to (Firefox) performs the conversion to 10 or 11 significant figures (about 57 bits, which is understandable given the 53-bit precision of f64). Since the number is always between 0 and 1, the first two characters are always 0. and then a 10 or 11 character random string follows.

This can be easily done using the rand crate, by choosing 11 of the 36 possible digits (Playground):

static BASE_36_DIGITS: &[u8; 36] = b"0123456789abcdefghijklmnopqrstuvwxyz";

fn random_base36() -> String {
    let mut rng = thread_rng();
        .chain(BASE_36_DIGITS.choose_multiple(&mut rng, 11).copied().map(char::from))
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