Feature extraction

feature_extraction.js

function containsQuestion(message) {
  return 1;
}

function containsYou(message) {
  return 0;
}

function senderRelationshipType(message) {
  return 2;
}

const Features = [
  containsQuestion,
  containsYou,
  senderRelationshipType
];

function getFeaturesForMessage(message) {
  var features = [];
  for (var i = 0; i < Features.count; i++) {
    var featureFunction = Features[i];
    features[i] = featureFunction(message);
  }
  return features;
}