How to use numbers only in alphabet

[hcaihao]

I use

hashids = Hashids(salt="hello", min_length=6, alphabet='0123456789')

But "Alphabet must contain at least 16 unique characters." execption raised.

Why Alphabet must contain at least 16?

[malefice]

The limit is most likely there for compatibility reasons, since this is a Python port of the JavaScript hashids implementation. The same limit is present in the JS source code.

On that note, I recommend this issue be closed.

[hcaihao]

The lua port support number only alphabet, could you add an option to support this feature?

[malefice]

Like I said, I think the limit is there for compatibility reasons with the JS implementation, and the maintainers/owner of the lua port probably thought that it is ok to add support for smaller alphabets. Whether it should be added here is up to the maintainers/owner of this port.

I am neither, so even if I submit a PR, it is still their decision. They have not even responded to this issue, and you created this issue almost 3 months ago. They have not even responded to my offer to help at #32. In any case, my use case does not need a smaller alphabet, so all things considered, I cannot allocate time to do this.

[lanningspencer]

Correct me if I am wrong here, but the request to use base 10 encoding for an integer which is already base 10... would just be substituting or ciphering.

see this link Base What?

[davidaurelio]

Apologies for the long silence here.

Yes, the limitation exists for compatibility with JS.
I don’t have any strong opinions on that though, and if there’s interest I’d be happy to accept a PR that removes the limitation.

Thanks!

[sentiasa]

I'd also prefer having 0123456789 as alphabet

[bodgerbarnett]

Apologies for the long silence here.

Yes, the limitation exists for compatibility with JS. I don’t have any strong opinions on that though, and if there’s interest I’d be happy to accept a PR that removes the limitation.

Thanks!

Would I be right in saying that this would simply be a case of removing the raise exception on line 194? Or is there more to it than that?

[davidaurelio]

@bodgerbarnett are you referring to [line 194 in the python implementation(https://github.com/davidaurelio/hashids-python/blob/master/hashids.py#L194)? Or do you mean line 185?

Honestly, in the end somebody would have to try it out. I can try working through the code at some point to see what possible detrimental effects of a small alphabet would be.

In any case, it is possible to use hex encoding (`alphabet='0123456789abcdef') and change the value to/from base 10 after encoding/before decoding.

[hcaihao]

I use alphabet="0123456789cfhistu" to filter letter.

[aman-moweb]

its only support int value