69 lines
1.3 KiB
Plaintext
69 lines
1.3 KiB
Plaintext
/* @flow strict */
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const rules = [
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[/(m)an$/gi, '$1en'],
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[/(pe)rson$/gi, '$1ople'],
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[/(child)$/gi, '$1ren'],
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[/^(ox)$/gi, '$1en'],
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[/(ax|test)is$/gi, '$1es'],
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[/(octop|vir)us$/gi, '$1i'],
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[/(alias|status)$/gi, '$1es'],
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[/(bu)s$/gi, '$1ses'],
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[/(buffal|tomat|potat)o$/gi, '$1oes'],
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[/([ti])um$/gi, '$1a'],
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[/sis$/gi, 'ses'],
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[/(?:([^f])fe|([lr])f)$/gi, '$1$2ves'],
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[/(hive)$/gi, '$1s'],
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[/([^aeiouy]|qu)y$/gi, '$1ies'],
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[/(x|ch|ss|sh)$/gi, '$1es'],
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[/(matr|vert|ind)ix|ex$/gi, '$1ices'],
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[/([m|l])ouse$/gi, '$1ice'],
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[/(kn|w|l)ife$/gi, '$1ives'],
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[/(quiz)$/gi, '$1zes'],
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[/s$/gi, 's'],
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[/([^a-z])$/, '$1'],
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[/$/gi, 's'],
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];
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const uncountables = [
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'advice',
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'energy',
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'excretion',
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'digestion',
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'cooperation',
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'health',
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'justice',
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'labour',
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'machinery',
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'equipment',
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'information',
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'pollution',
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'sewage',
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'paper',
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'money',
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'species',
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'series',
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'rain',
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'rice',
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'fish',
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'sheep',
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'moose',
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'deer',
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'news',
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'expertise',
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'status',
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'media',
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];
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export function pluralize(str: string): string {
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let found;
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// eslint-disable-next-line
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if (!~uncountables.indexOf(str.toLowerCase())) {
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found = rules.filter(rule => str.match(rule[0]));
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if (found[0]) {
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return str.replace(found[0][0], found[0][1]);
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}
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}
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return str;
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}
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