如何遍歷另一個對象數組中的對象數組-javascript

Question

我的數據如下所示：

var songs = [
    {Object1: [{Obj1: songId}]},
    {Object2: [{Obj1: songId}]}
];

從整個歌曲數組中獲取所有songId的最佳方法是什么？

Answer 1

進行一些迭代即可。

 var songs = [ { Object1: [{ Obj1: 8 }] }, { Object2: [{ Obj1: 99 }] } ], songId = []; songs.forEach(function (o) { Object.keys(o).forEach(function (k) { o[k].forEach(function (a) { songId.push(a.Obj1); }); }); }); document.write('<pre>' + JSON.stringify(songId, 0, 4) + '</pre>'); 

Answer 2

var songsIdCollection = [];

songs.forEach(function(wrappedSongData) {
    //{ Object1: [ {Obj1: songId} ] }
    wrappedSongData.forEach(function(songIdMaps) {
        //[ {Obj1: songId} ]
        songIdMaps.forEach(function(songIdMap) {
            //{Obj1: songId}
            songsIdCollection.push(songIdMap.Obj1);
        });
    });
});