Ngrams Generators

ngrams.js

const _ = require('ramda')

const ngrams = function (string) {
    var r = [];
    for (var n = 2; n <= string.length; n++)
        for (var i = 0; i <= string.length - n; i++)
            r.push(string.substring(i, i + n));
    return r;
}

const ngramsForStatement = function(statement) {
   const words = statement.replace(',', '').split(' ')
   const allngrams = words.map(function(word) {
       return ngrams(word)
   });
   return _.uniq(_.flatten(allngrams))
}


console.log(ngramsForStatement("COSTA, COFFEE"))