JavaScript将数组推入数组

我目前正在使用GoogleMaps的地理编码，需要创建一个数组，其中包含数组作为元素

基本上，我需要创建以下内容：

    var locations = [
      ['Bondi Beach', -33.890542, 151.274856, 4],
      ['Coogee Beach', -33.923036, 151.259052, 5],
      ['Cronulla Beach', -34.028249, 151.157507, 3],
      ['Manly Beach', -33.80010128657071, 151.28747820854187, 2],
      ['Maroubra Beach', -33.950198, 151.259302, 1]
    ];

但是动态的！ 我需要这个阵列，以便稍后在地图上放置图钉

我在做什么：

        var locations = []; // The initial array
        for (var i = 0; i < addresses.length; ++i){

            var address=addresses[i]; // the address e.g. 15 Main St, Hyannis, MA
            geocoder.geocode({ 'address': address}, function(results){
                var obj = {
                    0: address,
                    1: results[0].geometry.location.hb,
                    2: results[0].geometry.location.ib,
                    3: i
                };
                console.log(obj);
                locations.push(new Array());
                locations[i].push(obj);

            });
        };

        console.log(locations.length);

var位置=[]；//初始数组
对于（变量i=0；i

问题，问题：

我没有看到任何错误，但在末尾位置[]数组为空

如果需要，这里有一个控制台屏幕：

---

这应该是您所需要的全部：

geocoder.geocode({ 'address': address}, function(results){
            locations.push([
              address,
              results[0].geometry.location.hb,
              results[0].geometry.location.ib,
              i //this is actually going to always be 
                //addresses.length because the callback won't fire
                //until well after the loop has completed. 
                //Is this really a necessary field to have 
                //in your array? if so, you'll need to refactor a bit
            ]);
        });

---

我没有时间测试代码，但它应该是这样工作的：

    function requestLocations( addresses, callback ) {
        var remainingLocations = addresses.length;
        var locations = [];

        for (var i = 0; i < addresses.length; ++i){

            var address=addresses[i]; // the address e.g. 15 Main St, Hyannis, MA

            locations[i] = [];

            geocoder.geocode({ 'address': address}, (
                function(idx) {
                    return function(result) {
                        locations[idx] = [  addresses[idx], 
                                            results[0].geometry.location.hb,
                                            results[0].geometry.location.ib,
                                            idx
                                        ];

                        //decrement the number of remaining addresses
                        --remainingLocations;

                        //if there are no more remaining addresses and a callback is provided then call this calback with the locations
                        if( remainingLocations === 0 && callback ) {
                            callback(locations);
                        }               
                    }; // returns the real callback function for your geocoding

                })(i) //direct invocation of function with paramter i for scoping
            );

        }
    }


    requestLocations(addresses, function( locations ) {
        console.dir(locations);
        console.log(locations.length);
    });

---

geocode

是异步的。在处理array.Hm之前，您需要等待所有呼叫回复。我认为应该完成循环，脚本才能继续？否？在这个问题中，将空数组推入另一个数组的基本方法并不明显，因此我要指出，对于数组，它是

myArray.push（new array（））

myArray

必须至少实例化为空数组，即

myArray=[]

有意义。。。但是console.log（locations.length）；仍然显示0@rinchik可能是因为

geocoder.geocode（）

是异步的。。。而

位置

在您记录时并未更改。请参阅普林霍恩对您的问题的评论…它是异步的，您只需在所有地理代码都已更改后启动

控制台.log

finished@BLSully您应该提到，

i

将始终是

地址。由于范围限制，长度

：我刚测试过！它起作用了！感谢您的详细回答和我的代码：）+1@rinchik其中有一个错误

address

应该是回调中的

addresses[idx]

。请重新检查您的代码，否则您的结果中将始终具有相同的地址。嗯。。。快速提问！出于某种原因，（var i=0；i var locations = []; // The initial array for (var i = 0; i < addresses.length; ++i) { var address = addresses[i]; // the address e.g. 15 Main St, Hyannis, MA geocoder.geocode({ 'address': address }, function(results) { //this part is called later when that data is ready (it is an asynchronous callback) }); }; //because of the async request this is still 0 console.log(locations.length);

      function(results) {
        var obj = {
            0: address,
            1: results[0].geometry.location.hb,
            2: results[0].geometry.location.ib,
            3: i
        };
        console.log(obj);
        locations.push(new Array());
        locations[i].push(obj);

      }