调用内部的异步函数进行循环

var path;

for (var i = 0, c = paths.length; i < c; i++)
{
    path = paths[i];

    fs.lstat(path, function (error, stat)
    {
        console.log(path); // this outputs always the last element
    });
}
var path;

for (var i = 0, c = paths.length; i