geoContains.js

{
  let phillyNeighborhoods = {};
  let workingPhillyBike = phillyBike;
  
  phillyGeo.features.forEach(function(geo) {
    phillyNeighborhoods[geo.properties.listname] = {
      count: 0,
      cartodb_id: geo.properties.cartodb_id
    };
    
    let reducedPhillyBike = workingPhillyBike;
    workingPhillyBike = [];
    
    reducedPhillyBike.forEach(function(bike) {
      if(d3Geo.geoContains(geo, [bike.end_lon, bike.end_lat])) {
        phillyNeighborhoods[geo.properties.listname].count += 1;
      } else {
        workingPhillyBike.push(bike);
      }
    });
  });
  
  let neighborhoods = Object.keys(phillyNeighborhoods).map(function(n) {
                        return {"Neighborhood": n, 
                                "Count": phillyNeighborhoods[n].count,
                                cartodb_id: phillyNeighborhoods[n].cartodb_id};
                      });
  
  return neighborhoods;
}