spelling

A spelling checker that provides words suggestions, and the facility to search for words with a specific prefix.

Install

$ npm install --save spelling

Usage

var spelling = require('./'),
    dictionary = require('./dictionaries/en_US.js');

var dict = new spelling(dictionary);

console.log(dict.lookup('yes'));
//{ found: true, word: 'yes', rank: 5398 }

console.log(dict.lookup('hei'));
/*
{ found: false,
  word: 'hei',
  suggestions:
   [ { found: true, word: 'he', rank: 38410 },
     { found: true, word: 'her', rank: 14182 },
     { found: true, word: 'hey', rank: 529 },
     { found: true, word: 'hi', rank: 398 },
     { found: true, word: 'heir', rank: 76 },
     { found: true, word: 'hen', rank: 34 },
     { found: true, word: 'hep', rank: 31 },
     { found: true, word: 'hem', rank: 21 },
     { found: true, word: 'hew', rank: 12 },
     { found: true, word: 'hex', rank: 9 } ] }
*/

console.log(dict.lookup('hey'));
//{ found: true, word: 'hey', rank: 529 }

console.log(dict.lookup('yellows'));
/*
{ found: false,
  word: 'yellows',
  suggestions:
   [ { found: true, word: 'yellow', rank: 380 },
     { found: true, word: 'yellowy', rank: 2 },
     { found: true, word: 'fellow', rank: 551 },
     { found: true, word: 'bellow', rank: 36 },
     { found: true, word: 'mellow', rank: 32 } ] }
*/

console.log(dict.lookup('colleage', {suggest: false}));
//{ found: false, word: 'colleage' }

console.log(dict.search('manu'));
/*
[ { word: 'manual', rank: 395 },
  { word: 'manure', rank: 19 },
  { word: 'manumit', rank: 2 },
  { word: 'manuel', rank: 1 },
  { word: 'manuela', rank: 1 } ]
*/

console.log(dict.search('manu', {depth: 8}));
/*
[ { word: 'manuscript', rank: 752 },
  { word: 'manual', rank: 395 },
  { word: 'manufacturer', rank: 211 },
  { word: 'manufacture', rank: 82 },
  { word: 'manure', rank: 19 },
  { word: 'manumit', rank: 2 },
  { word: 'manumission', rank: 2 },
  { word: 'manumitted', rank: 2 },
  { word: 'manumitting', rank: 2 },
  { word: 'manuela', rank: 1 },
  { word: 'manuel', rank: 1 } ]
*/

Custom Dictionaries

If you'd prefer to receive suggestions on people or place names (for which there is no apparent "rank"), you can simply supply an array of those names.

var spelling = require('./');

var dict = new spelling(['wilkes-barre', 'philadelphia']);

console.log(dict.lookup('wilkes barre'));
//{ found: false, word: 'wilkes-barre', rank: 1 }

Otherwise, the dictionary format is one big string of pairs, space delimited: word1 rank1 word2 rank2 [...] where the ranks are integers.

API

.lookup(word, [opts])

Perform dictionary lookup for the given word/words.

Parameters

{String|Array} word

The word/words array on which perform dictionary lookup.

{Object} [opts]

opts is an optional object contains options to alter the lookup behavior.

options

{boolean} suggest, default true

suggest specifies whether to give suggestions if the lookup failed to find the word in the dictionary.

Example

console.log(dict.lookup('yes'));
//{ found: true, word: 'yes', rank: 5398 }

console.log(dict.lookup('hei'));
/*
{ found: false,
  word: 'hei',
  suggestions:
   [ { found: true, word: 'he', rank: 38410 },
     { found: true, word: 'her', rank: 14182 },
     { found: true, word: 'hey', rank: 529 },
     { found: true, word: 'hi', rank: 398 },
     { found: true, word: 'heir', rank: 76 },
     { found: true, word: 'hen', rank: 34 },
     { found: true, word: 'hep', rank: 31 },
     { found: true, word: 'hem', rank: 21 },
     { found: true, word: 'hew', rank: 12 },
     { found: true, word: 'hex', rank: 9 } ] }
*/
console.log(dict.lookup('hei’, {suggest: false}));
/*
{ found: false, word: 'hei'}
*/

.search(prefix, [opts]);

Perform dictionary search for words that start with the supplied prefix, the search depth can be specified to limit the search result.

Parameters

{String} prefix

The search prefix.

{Object} [opts]

opts is an optional object contains options to alter the search behavior.

options

{Number} depth ,default is 3.

the search depth which specify how deep the search is inside the dictionary tree, in another word, how many extra letters the result words have than the prefix.

Example

 dict.search('man', {depth: 2});
[ { word: 'many', rank: 12758 },
  { word: 'man', rank: 3913 },
  { word: 'mania', rank: 66 },
  { word: 'manic', rank: 61 },
  { word: 'manly', rank: 36 },
  { word: 'manor', rank: 31 },
  { word: 'mane', rank: 14 },
  { word: 'mango', rank: 12 },
  { word: 'manna', rank: 9 },
  { word: 'manse', rank: 8 },
  { word: 'mange', rank: 7 },
  { word: 'mangy', rank: 6 },
  { word: 'manta', rank: 4 },
  { word: 'manky', rank: 4 },
  { word: 'mani', rank: 1 },
  { word: 'manet', rank: 1 },
  { word: 'manx', rank: 1 },
  { word: 'mandy', rank: 1 },
  { word: 'mann', rank: 1 },
  { word: 'man\'s', rank: 1 } ]

.insert(word, [rank])

Insert a new word into the dictionary, optionally specify the word’s rank

Parameters

{String} word

The word to be added into the dictionary.

{Number} [rank]

the word’s rank. The rank affects the suggestion and the search where words with higher ranks appear first. In case the rank is not supplied, the default rank is 1, if the word is not already in the dictionary, or increment the current word’s rank by 1 if the word is already added.

.remove(word)

Remove word from the dictionary.

Parameters

{String} word

The word to be removed from the dictionary.

Authors

spelling was written by Ahmed AlSahaf but is now maintained here.