jp-numerals

Convert numbers into Japanese rank format (e.g. 123455 => 12_万_3455)

inspired from number-to-chinise-words

Instaling

npm install jp-numerals

Or,

yarn add jp-numerals

Usage

numerals(n: number, base: JpNumeralUnit = JpNumeralUnit.零) => Numerals

const formatter = require('jp-numerals')
// or import { numerals } from 'jp-numerals'

const n = formatter.numerals(123456789)

Numerals.toString

n.toString()

// => returns
'1億2345万6789'

Numerals.toTuples

n.toTuples()

// => returns
[
  [1, '億'],
  [2345, '万'],
  [6789, '']
]

Numerals.toNumeralObjs

n.toNumeralObjs()

// => returns
[
  { unit: 2, character: '億', rank: 2, digits: 1 },
  { unit: 1, character: '万', rank: 1, digits: 2345 },
  { unit: 0, character: '', rank: 0, digits: 6789 } 
]

Numerals.toNumerals

n.toNumerals()

// => returns
[ 
  Numeral { raw: 123456789, unit: 2 },
  Numeral { raw: 123456789, unit: 1 },
  NumeralZero { raw: 123456789, unit: 0 } 
]

Numerals.round

• round: : (base: JpNumeralUnit) => Numerals

import {numerals} from 'jp-numerals';
const n = numerals(12_3456_7890)

n.round(JpNumeralUnit.億).toString()
// => returns
'12億'

Signed methods

• sign: () => Sign
• toSignedNumerals: () => [Sign, Numeral[]]
• toSignedTuples: () => [Sign, [number, string][]]
• toSignedNumeralObjs: () => [Sign, NumeralObj[]]
• toSignedString: () => string

import {numerals} from 'jp-numerals';
const n = numerals(-123456789)

n.sign()
// => returns -1

n.toSignedString()
// => returns '-1億2345万6789'

n.toSignedNumeralObjs()
// => returns
[
  -1,
  [
    { unit: 2, character: '億', rank: 2, digits: 1 },
    { unit: 1, character: '万', rank: 1, digits: 2345 },
    { unit: 0, character: '', rank: 0, digits: 6789 } 
  ]
]

Development

test

npm test
npm run test:watch
npm run test:prod

commit

Do not use regular git commit for semantic release.

Instead:

npm run commit

This library is based on typescript-library-starter