Javascript 闭包和 for 循环

Question

下面的代码返回: 10 10 10 10 10 10 10....

如何产生以下输出？ 0 1 2 3 4 5 6 7 8 9

这是我的代码:

function go() {
    var procedures = [];

    for (var i = 0; i < 10; i++) {
      procedures[procedures.length] = function () {
        alert("You are now " + i + " years old");
      };
    }

    run_procs(procedures);
}

function run_procs(procs) {
    for (var i = 0; i < procs.length; i++) {
        procs[i]();
    }
}

go();

请指导我，谢谢...

Answer 1

将其包装在自执行的匿名函数中

for (var i = 0; i < 10; i++) {
    (function (i) {
        procedures[procedures.length] = function () {
            alert("You are now " + i + " years old");
        }
    })(i);
}