What I am looking for is how strings are physically treated in Javascript. Best example I can think of for what I mean is that in the Java api it describes the storage of strings as: String str = "abc";" is equivalent to: "char data[] = {'a', 'b', 'c'}; To me this says it uses an array object and stores each character as its own object to be used/a
我在寻找的是如何在Javascript中实际处理字符串。 我能想到的最好的例子就是在Java api中它将字符串的存储描述为： String str = "abc";" is equivalent to: "char data[] = {'a', 'b', 'c'}; 对我来说，这表示它使用一个数组对象，并将每个字符存储为它自己的对象以供以后使用/访问（我通常在这些事情上是错误的！）... Javascript如何做到这一点？ 字符串是JavaScript中
I need to determine if an element in an iframe is visible on the screen. (if it is on the visible part of the screen) I mean the page can be very long and user must scroll to see the element index.html: <html> ... ... <iframe src="iframe.html" /> ... ... </html> iframe.html: <html> ... ... <div id="element"></div> .... ... <script type="text/javascript
我需要确定iframe中的元素是否在屏幕上可见。 （如果它在屏幕的可见部分）我的意思是页面可以很长，用户必须滚动才能看到元素 index.html的： <html> ... ... <iframe src="iframe.html" /> ... ... </html> Iframe.html的： <html> ... ... <div id="element"></div> .... ... <script type="text/javascript"> var el = document.getElementById('element'); if (isEl
I either dreamt about chrome (dev channel) implementing a way to update the address bar via javascript (the path, not domain) without reloading the page or they really have done this. However, I can't find the article I think I read. Am I crazy or is there a way to do this (in Chrome)? ps I'm not talking about window.location.hash, et al. If the above exists the answer to this ques
我或者梦想着实现一种通过javascript（路径，而不是域）更新地址栏的方式来实现Chrome（开发通道），无需重新加载页面，或者他们确实已经完成了这项工作。 但是，我找不到我认为我阅读过的文章。 我疯了还是有办法做到这一点（在Chrome中）？ PS我不是在谈论window.location.hash等。 如果上述情况存在，这个问题的答案将是不真实的。 您现在可以在大多数“现代”浏览器中执行此操作！ 这是我读过的原文（2010年7月10日
I'm outputting values from a database (it isn't really open to public entry, but it is open to entry by a user at the company -- meaning, I'm not worried about XSS.) I'm trying to output a tag like this: <a href="" onclick="DoEdit('DESCRIPTION');">Click Me</a> DESCRIPTION is actually a value from the database that is something like this: Prelim Assess "Mini" Repor
我从数据库中输出数据（它并不是真正开放给公众参与，但它可以由公司的用户开放 - 这意味着我不担心XSS）。 我试图输出这样的标签： <a href="" onclick="DoEdit('DESCRIPTION');">Click Me</a> 描述实际上是数据库中的一个值，如下所示： Prelim Assess "Mini" Report 我已经尝试用“”替换“，但无论我尝试什么，Firefox都会在评估之后的空格之后切断我的JavaScript调用，并导致各种问题。 我必须承认明显的
Is there any way I can modify the URL of the current page without reloading the page? I would like to access the portion before the # hash if possible. I only need to change the portion after the domain, so its not like I'm violating cross-domain policies. window.location.href = "www.mysite.com/page2.php"; // sadly this reloads This can now be done in Chrome, Safari, FF4+, and IE10pp4
有什么方法可以修改当前页面的URL而无需重新加载页面？ 如果可能，我想访问＃哈希前的部分。 我只需要更改域后的部分，所以它不像我违反跨域策略。 window.location.href = "www.mysite.com/page2.php"; // sadly this reloads 现在可以在Chrome，Safari，FF4 +和IE10pp4 +中完成！ 有关详情，请参阅此问题的答案：使用新网址更新地址栏，而不使用散列或重新加载页面 例： function processAjaxData(response, urlP
This question already has an answer here: For-each over an array in JavaScript? 23 answers function preload(arrayOfImages){ $(arrayOfImages).each(function(){ (new Image()).src = this; }); for(i=1;i<=40;i++) preload('/img/wallpapers/'images' + i + '.jpg');
这个问题在这里已经有了答案： 对于JavaScript中的每个数组？ 23个答案 function preload(arrayOfImages){ $(arrayOfImages).each(function(){ (new Image()).src = this; }); for(i=1;i<=40;i++) preload('/img/wallpapers/'images' + i + '.jpg');
This question already has an answer here: For-each over an array in JavaScript? 23 answers for..in loops over enumerable properties and arrays have numerical properties which acts as index. It is to be used with only objects. Doing so with Arrays will also give you properties which you won't be interested in(such as those properties which are on the higher chain of prototypic inherita
这个问题在这里已经有了答案： 对于JavaScript中的每个数组？ 23个答案 for..in循环for..in枚举属性和数组具有充当索引的数字属性。 它仅与对象一起使用。 使用数组这样做也会给你，你不会感兴趣的属性（如那些在原型继承来自上级链性能Object的对象） 所以使用一个简单的for循环或Array.forEach products.forEach(function(str){ console.log(str); }); // or for(var i = 0; i < products.length; i++) con
This question already has an answer here: For-each over an array in JavaScript? 23 answers 试试这个(offer.products || []).forEach(function(product) { console.log(product); }); Just add the fitting checks: if (offer.products) { //blocks products==null and products==undefined offer.products.forEach(function(product) { console.log(product); }); } Empty should not be a probl
这个问题在这里已经有了答案： 对于JavaScript中的每个数组？ 23个答案 试试这个(offer.products || []).forEach(function(product) { console.log(product); }); 只需添加适配检查： if (offer.products) { //blocks products==null and products==undefined offer.products.forEach(function(product) { console.log(product); }); } 空白不应该是一个问题，因为如果产品是空的，forEach不应该做任
This question already has an answer here: For-each over an array in JavaScript? 23 answers A better, less server intensive way would be to pass... The whole array to server, var ids = ["id1", "id2", "id3", "id4"]; $.ajax({ url: "../folder/lookupserver.php", type: "POST", data: { 'id': ids }, dataType: "JSON", success: function (data) { $result = d
这个问题在这里已经有了答案： 对于JavaScript中的每个数组？ 23个答案 一个更好，更少服务器密集的方式将通过... 整个数组到服务器， var ids = ["id1", "id2", "id3", "id4"]; $.ajax({ url: "../folder/lookupserver.php", type: "POST", data: { 'id': ids }, dataType: "JSON", success: function (data) { $result = data; $('#input field').val($result);
This question already has an answer here: For-each over an array in JavaScript? 23 answers Is very important if you are going to use in to check with hasOwnProperty if not you can get more values specially if you are using libraries like prototype. hasOwnProperty will check if the property is direct property of the object for (var i in list) { if (list.hasOwnProperty(i)){
这个问题在这里已经有了答案： 对于JavaScript中的每个数组？ 23个答案 如果您打算使用hasOwnProperty来检查是否非常重要，如果您不使用类似库的原型，那么您可以专门获取更多值。 hasOwnProperty将检查属性是否是对象的直接属性 for (var i in list) { if (list.hasOwnProperty(i)){ console.log(i); } } 简单地说： [1,2,3,4].forEach(function(i) { console.log(i); }); 但正