关于JS代码， var index=this.data.playIndex >=this.data.playlist.length-1?0:this.data.playIndex+1; this.setMusic(index) 说法正确的是
关于JS代码， var index=this.data.playIndex >=this.data.playlist.length-1?0:this.data.playIndex+1; this.setMusic(index) 说法正确的是
1