add implementation table

README.md

@@ -40,12 +40,18 @@ with psycopg.connect("postgresql://...") as conn:
     print(res)          # user_2accvpp5guht4dts56je5a
 ```
 
-## Table of contents
+## Demo
+You can give it a spin at [upid.rdrn.me](https://upid.rdrn.me/).
+
+## Implementations
+
 If you don't have time for ASCII art, you can skip to the good stuff:
-* [Specification](#specification)
-* [Python implementation](#python-implementation)
-* [Rust implementation](#rust-implementation)
-* [Postgres extension](#postgres-extension)
+| Language   | Link                                                    |
+| --------   | ------------------------------------------------------- |
+| Python     | [in this repo (scroll down)](#python-implementation)    |
+| Postgres   | [in this repo (scroll down)](#postgres-extension)  |
+| Rust       | [in this repo (scroll down)](#rust-implementation)      |
+| TypeScript | [carderne/upid-ts](https://github.com/carderne/upid-ts) |
 
 ## Specification
 Key changes relative to ULID:

py/upid/core.py

@@ -53,12 +53,12 @@ def from_prefix_and_datetime(cls: type[Self], prefix: str, datetime: dt.datetime
     @classmethod
     def from_prefix_and_milliseconds(cls: type[Self], prefix: str, milliseconds: int) -> Self:
         """
-        Create a new `UPID` from a `prefix`, using the supplied `timestamp`.
+        Create a new `UPID` from a `prefix`, using the supplied `milliseconds`.
 
         `milliseconds` must be an int in milliseconds since the epoch.
 
         The timestamp is converted to 6 bytes, but we drop 1 byte, resulting
-        in a time precision of about 100 milliseconds
+        in a time precision of about 256 milliseconds
 
         The prefix is padded with 'z' characters (if too short) and
         trimmed to 4 characters (if too long). Supply a prefix of exactly