compromise/src/data/nouns/irregular_plurals.js

natural language processing in the browser

//nouns with irregular plural/singular forms
//used in noun.inflect, and also in the lexicon.
//compressed with '_' to reduce some redundancy.
'use strict';
let main = [
  ['child', '_ren'],
  ['person', 'people'],
  ['leaf', 'leaves'],
  ['database', '_s'],
  ['quiz', '_zes'],
  ['stomach', '_s'],
  ['sex', '_es'],
  ['move', '_s'],
  ['shoe', '_s'],
  ['goose', 'geese'],
  ['phenomenon', 'phenomena'],
  ['barracks', '_'],
  ['deer', '_'],
  ['syllabus', 'syllabi'],
  ['index', 'indices'],
  ['appendix', 'appendices'],
  ['criterion', 'criteria'],
  ['man', 'men'],
  ['rodeo', '_s'],
  ['epoch', '_s'],
  ['zero', '_s'],
  ['avocado', '_s'],
  ['halo', '_s'],
  ['tornado', '_s'],
  ['tuxedo', '_s'],
  ['sombrero', '_s'],
  ['addendum', 'addenda'],
  ['alga', '_e'],
  ['alumna', '_e'],
  ['alumnus', 'alumni'],
  ['bacillus', 'bacilli'],
  ['cactus', 'cacti'],
  ['beau', '_x'],
  ['château', '_x'],
  ['chateau', '_x'],
  ['tableau', '_x'],
  ['corpus', 'corpora'],
  ['curriculum', 'curricula'],
  ['echo', '_es'],
  ['embargo', '_es'],
  ['foot', 'feet'],
  ['genus', 'genera'],
  ['hippopotamus', 'hippopotami'],
  ['larva', '_e'],
  ['libretto', 'libretti'],
  ['loaf', 'loaves'],
  ['matrix', 'matrices'],
  ['memorandum', 'memoranda'],
  ['mosquito', '_es'],
  ['opus', 'opera'],
  ['ovum', 'ova'],
  ['ox', '_en'],
  ['radius', 'radii'],
  ['referendum', 'referenda'],
  ['thief', 'thieves'],
  ['tooth', 'teeth']
];
//decompress it
main = main.map(function(a) {
  a[1] = a[1].replace('_', a[0]);
  return a;
});
//build-out two mappings
const toSingle = main.reduce((h, a) => {
  h[a[1]] = a[0];
  return h;
}, {});
const toPlural = main.reduce((h, a) => {
  h[a[0]] = a[1];
  return h;
}, {});

module.exports = {
  toSingle: toSingle,
  toPlural: toPlural
};