survey_response_requirements

evaluate.js

var survey_responses = [
  {
    eyes: {
      color: 'blue'
    },

    flavors: {
      favorite: 'vanilla'
    }
  }
];

function blue_eyes(response) {
  return response.eyes.color === 'blue';
}

function likes_vanilla(response) {
  return response.flavors.favorite === 'vanilla';
}



function requirements(count) {  
  return function(index, response) { 
    var all = true;

    var methods = Array.prototype.slice.call(arguments, 1);

    $.each(methods, function(requirement) {
      if ( ! requirement(response); ) {
        all = false;
      }
    });

    if (all) { 
      count++;
    }
  }
}

function evaluate(done, survey_responses, *requirements) {
  // var requirements = Array.prototype.slice.call(arguments, 2);
  var count;

  $.each(survey_responses, function(index, response) { 
    var all = true;

    $.each(requirements, function(requirement) {
      if ( ! requirement(response); ) {
        all = false;
      }
    });

    if (all) count++;
  });

  done(count);
}

evaluate(console.log.bind(console), survey_responses, blue_eyes, likes_vanilla);