Question

这是我的代码：

var album1 = "First Album name";
var album2 = "Second Album Name";
var album3 = "Third Album Name";
var album4 = "Fourth Album name";
var album5 = "Fifth Album name";

var currentAlbumCtr = 1;
var currentAlbum = album + currentAlbumCtr;

如果currentAlbumCtr为1，currentAlbum应该设置为album1。任何人都可以帮忙吗？

Answer 1

您可以使用eval来达到您想要的效果，但这可能是错误的做法。为什么不使用数组：

var album = [];
album[1] = "First Album name";
album[2] = "Second Album Name";
album[3] = "Third Album Name";
album[4] = "Fourth Album name";
album[5] = "Fifth Album name";

currentAlbumCtr = 1;
currentAlbum = album[currentAlbumCtr];

或者，或者，

var album = {
    "1": "First Album name";
    "2": "Second Album Name";
    "3": "Third Album Name";
    "4": "Fourth Album name";
    "5": "Fifth Album name";
};

甚至

var album = [
    "First Album name",
    "Second Album Name",
    "Third Album Name",
    "Fourth Album name",
    "Fifth Album name"
];

currentAlbumCtr = 1;
currentAlbum = album[currentAlbumCtr-1];

注意最后一个语句的-1，因为数组通常从0开始索引

Answer 2

如果currentAlbumCtr为1，
currentAlbum应设置为album1。

if (currentAlbumCtr == 1) {
    currentAlbum = album1;
}

Answer 3

不完全确定你要求的是什么。 this有效吗？

<强>脚本：

var albums =
           [ "album1",
             "album2",
             "album3" ];

$("#clickme").click(function(){
    var currentAlbum = parseInt($("#album_number").val()) % albums.length;
    alert(albums[currentAlbum]);
})

<强> HTML：

<button id="clickme">click!</button>
<input id="album_number"></input>

Answer 4

var currentAlbum = eval("album" + currentAlbumCtr);

我可以在javascript中将变量设置为变量组合吗？

4 个答案: