基於類別的過濾器數組

Question

有一個標記數組，每個標記都屬於一個或多個類別。

你將如何實現一個搜索/過濾器來檢索cat = X的所有標記？

例如：

• 所有貓= 9標記？
• cat = 5和9的所有標記？

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

修改它找貓4以及...

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; 
}; 

Answer 2

事情是這樣的，它使用正則表達式來找到在needleArray是否逗號分隔列表中的貓中發現，如果是這樣，那標記添加到返回的數組。

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 regex = new RegExp('(^|)' + needleArray[e] + '(,|$)'); 
     if (markers[i].cat.search(regex) !== -1) { 
      matches.push(markers[i]); 
     } 
     } 
    } 
    return matches; 
}