@mrizki/natural/lib/natural/classifiers/maxent/Context.js

General natural language (tokenizing, stemming (English, Russian, Spanish), part-of-speech tagging, sentiment analysis, classification, inflection, phonetics, tfidf, WordNet, jaro-winkler, Levenshtein distance, Dice's Coefficient) facilities for node.

/*
  Context class
  Copyright (C) 2017 Hugo W.L. ter Doest

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

var stringify = require('json-stable-stringify');

function Context(data) {
  this.data = data;
}

// Create a predictable key string for looking up in a hash
Context.prototype.toString = function() {
  if (!this.key) {
    this.key = stringify(this.data);
  }
  return this.key;
};

module.exports = Context;