無法理解和創建動態JavaScript對象

Question

我希望我的代碼能夠自我解釋，我快要在那里了，我只是停留在如何將可選數據合並到具有多個級別的JSON對象的方式上（這就是它的意思嗎？）

//get video list - example: video1.flv;test23.flv;Grabledable.flv
var files = j('.videos').html().split(';');
// assume first we have one video, so no need of playlist
var isplaylist = false;
// check if there are actually more than one video
if (files.length > 1) {
    isplaylist = true;
    var playlist = new Array(); // is this right? I want to add this to the video var
    for (var i in files) {
        playlist[] = {
            url: files[i],
            title: 'Video ' + i
        };
    }
};

//here's where the trouble starts
var video = {
    plugins: {
        controls: {
            playlist: isplaylist,
            //i cut out all irrelevant extra data
        }
    }, 
    clip: {

        url: files[0],
        // ONLY DO THIS IF isplayer == false;
        wmode: 'opaque',
        baseUrl: "/video/",
        autoPlay: false
    },

    // from here on this should only occur if isplayer == true;
    // following is the way I want it attached from var playlist
    playlist: [{
        url: 'video1.flv',
        title: 'Video 0'
    },
    {
        url: 'test23.flv',
        title: 'Video 1'
    },
    {
        url: 'Grabledable.flv',
        title: 'Video 2'
    }]
};

我的目標是此處列出的格式：JavaScript編碼部分下的http://flowplayer.org/plugins/javascript/playlist.html 。

Answer 1

如果我沒記錯的話，您想要這樣的東西：

var video = {
  plugins: {
    controls: {
      playlist: false
    }
  },
  clip:  {
      wmode: 'opaque',
      baseUrl: "/video/",
      autoPlay: false
  }
}

// check if there are actually more than one video
if(files.length > 1){
  video.plugins.controls.playlist = true;
  var playlist = [];
  for ( var i = 0, l = files.length; i < l; i++ )
  {
     playlist.push({url: files[i], title: 'Video '+ i});
  }
  video.playlist = playlist;
}
else {
  video.clip.url = files[0];
}

動態添加相應的條目（例如video.playlist或video.clip.url ）。 切勿使用for ( ... in ...)構造遍歷數組！

Answer 2

1. 不要為數組使用for-in
2. 使用push方法將新元素添加到數組中（您使用的格式僅在PHP中存在）

碼：

// assuming you have video declared before
var video = { ... };

//get video list - example: video1.flv;test23.flv;Grabledable.flv
var files = j('.videos').html().split(';');
// assume first we have one video, so no need of playlist
var isplaylist = false;
// check if there are actually more than one video
if ( files.length > 1 ) {
    isplaylist = true;
    var playlist = new Array();
    for ( var i = 0; i < files.length; i++ ) {
        playlist.push ({
            url: files[i],
            title: 'Video ' + i
        });
    }
};

video.playlist = playlist;