在 JavaScript 上尝试无限循环
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Trying a infinite loop on JavaScript
提问by DanielM
I am trying to do a infinite loop, but it only works if I include an 'alert' on it. My code looks like this:
我正在尝试进行无限循环，但只有在其上包含“警报”时才有效。我的代码如下所示：
while( tocontinue ){
// Some code
alert('Accept to continue');
}
On this way, the user has to click to hide the alerts (for example, on Chrome), and then the loop continues correctly by itself. I need to implement this without any alert. I also tried this:
通过这种方式，用户必须单击以隐藏警报（例如，在 Chrome 上），然后循环自行正确继续。我需要在没有任何警报的情况下实现这一点。我也试过这个：
while( tocontinue ){
// Some code
tocontinue = false;
setTimeout(function(){tocontinue=true},500);
}
And with "window.setTimeout" too, and without the word "function(){}", but it doesn't work. I tried everything: some implementations on JavaScript of a sleep() function, calling the function each Xtime with setInterval, answers 1 and 3 on this post... :/
还有“window.setTimeout”，没有“function(){}”这个词，但它不起作用。我尝试了一切：sleep() 函数在 JavaScript 上的一些实现，每X次使用 setInterval调用该函数，在这篇文章中回答 1 和 3 ......：/
Thank you very much for your time.
非常感谢您的宝贵时间。
回答by Jonathan Lonowski
I'm trying to implement a genetic algorithm, and I want to stop it when I decide (with a button that puts the global variable "tocontinue" to false). Meanwhile, I want a infinite loop.
我正在尝试实现一个遗传算法，我想在我决定时停止它（使用一个将全局变量“tocontinue”设置为 false 的按钮）。同时，我想要一个无限循环。
Well, you won't be able to combine a true infinite loop with user interaction as they'll both be dependent on the same thread being able to work on them exclusively. But, you can get close with a near-instant interval.
好吧，您将无法将真正的无限循环与用户交互结合起来，因为它们都依赖于能够专门处理它们的同一个线程。但是，您可以以近乎即时的间隔接近。
var interval = setInterval(function () {
// some code
}, 10);
Possibly grouping a few iterations together for each round:
可能将每一轮的几次迭代组合在一起：
var interval = setInterval(function () {
var limit = 5;
while (limit--) {
// some code
}
}, 10);
But, the interval will keep the iteration going as quickly as possible while still giving some idle time for user interactions, like clicking a particular button to clear the interval.
但是，间隔将保持迭代尽可能快地进行，同时仍为用户交互留出一些空闲时间，例如单击特定按钮以清除间隔。
document.getElementById('stopButton').addEventListener('click', function () {
clearInterval(interval);
}, false);
Example: http://jsfiddle.net/coiscir/xZBTF/
回答by Daniel Jones
setInterval()may be more useful here.
setInterval()在这里可能更有用。
function updateLoop() {
//All the code goes here
}
setInterval(updateLoop,500);
回答by Shiv Singh
var reader = new XMLHttpRequest() || new ActiveXObject('MSXML2.XMLHTTP');
function loadFile() {
reader.open('get', 'ccc.txt', true);
reader.onreadystatechange = displayContents;
reader.send(null);
}
function displayContents() {
if(reader.readyState==4) {
var el = document.getElementById('main');
el.innerHTML = reader.responseText;
var data = el.innerHTML;
}
}
回答by nova_n
for(var I = 7; I >1; i+=3);
console.log(i)
