Flash AS3-如何獲取數組中的下一個元素

Question

我有五個可以播放的視頻，稱為視頻，還有一系列活動視頻，稱為activeVideos。 當一個視頻播放完畢時，我需要獲取其索引，在activeVideos數組中找到其位置，並獲取該數組中的下一個值。 如果數組中沒有其他值，則需要獲取第一個值。 所以本質上：

activeVideos = [0,1,3]
videos = [video1, video2, video3];

function nextVideo(e:Event){
    var curIndex = videos.indexOf(currentVideo);
    var next = activeVideos.find(curIndex).nextValue // pseudo-code - need to locate the position of the current video within the active array, select the next element, and call show video.
    showVideo(videos[next]);
}

我該怎么做呢？

Answer 1

activeVideos = [0,1,3]
videos = [video1, video2, null, video3];

function nextVideo(e:Event){
    var curIndex = videos.indexOf(currentVideo);
    var next = activeVideos[curIndex+1] || activeVideos[0];
    showVideo(videos[next]);
}

Answer 2

也許您可以在家中嘗試此操作，但我必須承認，自從html5，css3 + js炒作問世以來，我的Flash可能有點生疏了：)

nextIndex = -1;
nextIndex = ( (curIndex+1 == videos.length) ? 0 : curIndex+1 );
if (nextIndex > -1){
  var next = activeVideos[nextIndex];
  // ... do your stuff 
}

Answer 3

function nextVideo(e:Event){
    var curIndex = videos.indexOf(currentVideo) + 1;
    var nextVideo = curIndex >= videos.length ? videos[0] : videos[curIndex];
    showVideo(nextVideo);
}