Question

there is a an array of markers, each marker belongs to one or more categories.

how would you implement a search/filter to retrieve all markers having cat = X ?

for example:

• all markers with cat = 9 ?
• all markers with cat = 5 and 9 ?

Gmaps.map.markers = [
    {"id":9,"cat":"3, 5, 6","lat":"52.50","lng":"13.32"},
    {"id":11,"cat":"3","lat":"52.51","lng":"13.44"},
    {"id":12,"cat":"1, 2, 5","lat":"47.89","lng":"10.62"},
    {"id":13,"cat":"1, 2, 3, 4, 5","lat":"47.77","lng":"10.61"},
    {"id":15,"cat":"1, 6","lat":"40.60","lng":"-73.44"},
    {"id":16,"cat":"1, 3, 5, 9","lat":"51.89","lng":"17.16"},
    {"id":17,"cat":"9","lat":"52.37","lng":"9.73"}
];

Answer 1

modified it to find the cat 4 as well…

function findMarkersContaining ( markers, needleArray ) {
  var matches = [];
  var markerLength = markers.length;
  var needleArrayLength = needleArray.length;
    for ( var i = 0; i < markerLength; i++ ) {
      for ( var e = 0; e < needleArrayLength; e++ ) {
        var singleNeedle = needleArray[e];
        if ( $.inArray( singleNeedle, markers[i].cat.split(",")) !== -1 ) {
           matches.push( markers[i] );
        }
      }
    }
  return matches;
 };