JS实现延迟

    var xx = [1, 232, 34354, 554665, 4535, 5345345, 344535, 9890];
    for (var i = 0; i < xx.length; i++) {        
        (function (i) {
            setTimeout(function () {
                var k = xx[i];
                console.log(k);
            }, (i + 1) * 1000);
        })(i)
    }