助数詞「じょすうし」

Build with:

$ scripts/build && scripts/index
$ scripts/minify # optionally

The result is a static site:

• index.html
• style.css
• main.js
• data/

Example:

$ serve &

On data/

The JSON files under data/ works as the database. Each is names after the hexadecimal representation of the codepoints of the character used in the counter itself, preceeded with a _. For example "日" is data/_065e5.json.

The object itself is of the following Counter type:

type Counter = {
  repr: Ruby,
  tags: string[],
  cases: Record<number, Ruby>,
};
type Ruby = [kanji: string, reading: string];

tags is a list of *things* (usually plural nouns) that the counter applies for, in English. The name Ruby comes from the <ruby> HTML element, where <rt> would be reading.

The cases property lists the special cases in reading/writing for given numbers. A negative number indicates an exact match, otherwise the case will be re-used for larger numbers. For example -3 will be used for 3日 only, while 3 would be used for 3日, 13日, 23日...

The (generated) data/index.js file defines a counterIndexJSON variables. It contains a JSON, which is a list of [name: string, tags: string[]]. name is the name of a file in data/ without its extension (so "_065e5" for the example of 日).

Some Resources Used

• Tae Kim - Numbers and Counting
• American / Japanese Higher Numbers
• Tofugu - 350 Japanese Counters