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| # ru-plurals | ||
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| [](https://npmjs.org/package/ru-plurals "View this project on npm") | ||
| [](https://flow.org) | ||
| [](https://jestjs.io) | ||
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| Simple functional pluralization of Russian, Belarusian, and Ukrainian words. | ||
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| ## Install | ||
| ```bash | ||
| npm install --save ru-plurals | ||
| # or | ||
| yarn add ru-plurals | ||
| ``` | ||
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| ## Usage | ||
| #### plural | ||
| ```ts | ||
| import { plural } from 'ru-plurals'; | ||
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| const ruble = plural('рубль', 'рубля', 'рублей'); | ||
| const work = plural('работает', 'работают'); // same as plural('работает', 'работают', 'работают'); | ||
| const coffee = plural('кофе'); // same as plural('кофе', 'кофе', 'кофе') | ||
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| ruble(101) // 'рубль' | ||
| ruble(500) // 'рублей' | ||
| work(21) // 'работает' | ||
| coffee(2) // 'кофе' | ||
| ``` | ||
| #### format | ||
| ```ts | ||
| import { format } from 'ru-plurals'; | ||
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| const meters = format((count, word) => `${count} {word}`, 'метр', 'метра', 'метров'); | ||
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| meters(1) // '1 метр' | ||
| meters(200) // '200 метров' | ||
| ``` | ||
| with jsx: | ||
| ```ts | ||
| const distance = format( | ||
| (count, word) => ( | ||
| <div> | ||
| <div>{count}</div> | ||
| <span>{word}</span> | ||
| </div> | ||
| ), | ||
| 'метр', | ||
| 'метра', | ||
| 'метров', | ||
| ); | ||
| ``` |
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| // @flow strict | ||
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| type Plural = (number: ?number) => string; | ||
| import plural from './plural'; | ||
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| // N - number parameter (e.g. or ?number) | ||
| // R - retyrn type | ||
| export type Formatter = <N, R>(number: N, word: string) => R; | ||
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| function format(formatter: Formatter) { | ||
| return (_plural: Plural) => (number: ?number) => | ||
| formatter(number, _plural(number)); | ||
| function format( | ||
| formatter: Formatter, | ||
| one: string, | ||
| two?: string, | ||
| five?: string, | ||
| ) { | ||
| return (number: ?number) => formatter(number, plural(one, two, five)(number)); | ||
| } | ||
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| export default format; |
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| /* eslint-disable sonarjs/no-duplicate-string */ | ||
| import plural from './plural'; | ||
| import format from './format'; | ||
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| // nouns | ||
| const ruble = plural('рубль', 'рубля', 'рублей'); | ||
| const meter = plural('метр', 'метра', 'метров'); | ||
| const seat = plural('место', 'места', 'мест'); | ||
| const coffee = plural('кофе'); | ||
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| // formatting | ||
| const joinDash = (number, word) => `${number}-${word}`; | ||
| const joinSpace = (number, word) => `${number} ${word}`; | ||
| const skipZero = (number, word) => (number > 0 ? `${number} ${word}` : '-'); | ||
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| describe.each([ | ||
| [joinDash, ruble, 0, '0-рублей'], | ||
| [joinSpace, meter, 1, '1 метр'], | ||
| [skipZero, coffee, 0, '-'], | ||
| [skipZero, seat, 5, '5 мест'], | ||
| ])('formatPlural', (formatter, wordPlural, number, result) => { | ||
| [joinDash, ['рубль', 'рубля', 'рублей'], 0, '0-рублей'], | ||
| [joinSpace, ['метр', 'метра', 'метров'], 1, '1 метр'], | ||
| [skipZero, ['кофе'], 0, '-'], | ||
| [skipZero, ['место', 'места', 'мест'], 55, '55 мест'], | ||
| ])('format', (formatter, words, number, result) => { | ||
| test('works', () => { | ||
| expect(format(formatter)(wordPlural)(number)).toBe(result); | ||
| expect(format(formatter, ...words)(number)).toBe(result); | ||
| }); | ||
| }); | ||
| /* eslint-enable sonarjs/no-duplicate-string */ |
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| // @flow strict | ||
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| opaque type PositiveInt = number; | ||
| opaque type AbsInt = number; | ||
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| function toPositiveInt(number: ?number): PositiveInt { | ||
| return Math.abs(parseInt(number, 10)); | ||
| } | ||
| export type Numberlike = number | string | null | void; | ||
| export type Declensions = [string, string, string]; | ||
| export type Plural = (number: ?number) => string; | ||
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| type Declensions = [string, string, string]; | ||
| function absInt(number: Numberlike): AbsInt { | ||
| const int = Math.abs(parseInt(number, 10) || 0); | ||
| if (Number.isNaN(int)) { | ||
| throw new TypeError('Invalid number'); | ||
| } | ||
| return int; | ||
| } | ||
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| function declensions(one: string, _two?: string, _five?: string): Declensions { | ||
| const two = typeof _two === 'undefined' ? one : _two; | ||
| const five = typeof _five === 'undefined' ? two : _five; | ||
| return [one, two, five]; | ||
| } | ||
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| function pluralize(int: PositiveInt, _declensions: Declensions) { | ||
| function pluralize(int: AbsInt, _declensions: Declensions) { | ||
| return _declensions[ | ||
| int % 100 > 4 && int % 100 < 20 | ||
| ? 2 | ||
| : [2, 0, 1, 1, 1, 2][int % 10 < 5 ? int % 10 : 5] | ||
| ]; | ||
| } | ||
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| export type Plural = (number: ?number) => string; | ||
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| function plural(one: string, two?: string, five?: string): Plural { | ||
| return (number: ?number) => | ||
| pluralize(toPositiveInt(number), declensions(one, two, five)); | ||
| return (number: Numberlike) => | ||
| pluralize(absInt(number), declensions(one, two, five)); | ||
| } | ||
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| export default plural; |
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