Question

我想打印一个值（如Hello world），间隔为2秒，直到10秒。我该怎么办？

Answer 1

使用setInterval()每2秒打印Hello World，使用setTimeout()清除10秒后的间隔。

var interval = setInterval(function(){ 
  console.log('Hello World'); 
}, 2000);
setTimeout(function() { 
  clearInterval(interval); 
}, 10000);

Answer 2

代码：

var i=0;

var myfunc = setInterval(function(){

    i = i + 1;
    console.log('Hello World at '+ 2*i + ' seconds'); 

    if(i==5) {
        clearInterval(myfunc);
    }

}, 2000);

输出：

Hello World at 2 seconds  
Hello World at 4 seconds  
Hello World at 6 seconds  
Hello World at 8 seconds  
Hello World at 10 seconds

Answer 3

使用setTimeout（）函数来安排将来执行函数。以下示例有效，但如果您使用它来执行作业，则专门编写它以使您得到错误的评估

<script>
    $(document).ready(function() {
        $('#check-form').on('submit', function(evt){
            console.log($('input[name="valid"]').val());
            if($('input[name="valid"]').val()==1){
                return true;
            }
            evt.stopPropagation();
            evt.preventDefault();
            var elem=this;

            $.ajax({
                url: "{% url 'equipmentCheck' %}",
                data: {
                    pkk: "{{ booking.pk }}",
                    pk: $('input[name="equipment"]').val(),
                    start: $('input[name="start"]').val(),
                    end: $('input[name="end"]').val()
                },
                success: function(e){
                   if(!e.ok){
                       if(confirm('Your reservation time is overlapping with 
an existing reservation. Do you want to continue your reservation?')){
                           $('input[name="valid"]').val(1);
                           $(elem).submit();
                       }
                   }else{
                       $('input[name="valid"]').val(1);
                       $(elem).submit();
                   }
                }
            });

        });

Answer 4

var noTimeout = 2000;
var newTime = 0;
var maxTime = 10000;

function next(timeout) {
    if (timeout == undefined)
        timeout = noTimeout
    setTimeout(processAuto, timeout);
}

function processAuto() {
    console.log("Hello world")
    newTime = newTime + noTimeout;
    if (newTime >= maxTime) {
        process.exit(0);
    } else {
        next(noTimeout);
    }
}
processAuto();

Answer 5

这让我有机会玩process.hrtime()方法。

let currentTime
let counter = 0

while (counter < 10) {
  if (counter === 0 || currentTime !== (currentTime = process.hrtime()[0])) {
    if (counter++ % 2) console.log("Hello world")
  }
}

Answer 6

使用此代码段确定每次运行之间的确切间隔。

setTimeout(function prn(i){
  console.log('Hello world');
  i++;
  if(i < 5){
    setTimeout(prn, 2000, i);
  }
}, 2000, 0);

和下面的代表每次运行之间的间隔。

var inter = setInterval(() => console.log('TCS'), 2000);
setTimeout(() => clearInterval(inter), 10000);

Answer 7

var inter = setInterval(() => console.log('Hello world'), 5000);
setTimeout(() => clearInterval(inter), 10000);

Answer 8

var inter = setInterval(() => console.log('TCS'), 2000);
setTimeout(() => clearInterval(inter), 10000);

如何打印＆＃34; Hello world＆＃34;在Node.js中每2秒持续10秒？

8 个答案: