I have initialized several variables in the global scope in a JavaScript file: var moveUp, moveDown, moveLeft, moveRight; var mouseDown, touchDown; I need to set all of these variables to false, this is the code I currently have: moveUp = false; moveDown = false; moveLeft = false; moveRight = false mouseDown = false; touchDown = false; Is there any way that I can set all of these variabl
我在JavaScript文件中初始化了全局范围中的几个变量： var moveUp, moveDown, moveLeft, moveRight; var mouseDown, touchDown; 我需要将所有这些变量设置为false，这是我目前拥有的代码： moveUp = false; moveDown = false; moveLeft = false; moveRight = false mouseDown = false; touchDown = false; 是否有任何方法可以将所有这些变量设置为一行代码中的相同值，或者是我目前有最佳方式执行此操作的代码 没有什
This question already has an answer here: Multiple left-hand assignment with JavaScript 6 answers Unless you are aware that you are creating a global variable (which is mostly considered bad practice, anyway), it's not ok. If you came from a language like Java, it's natural to do something like: int foo = bar = 0; Both variables foo and bar will be initialized with value 0, both i
这个问题在这里已经有了答案： 使用JavaScript 6多个左侧分配的答案 除非你知道你正在创建一个全局变量（无论如何，这通常被认为是不好的做法），但这并不好。 如果你来自Java这样的语言，那么很自然的做一些事情： int foo = bar = 0; 在当前范围内，两个变量foo和bar都将使用值0初始化。 但在Javascript中： var foo = bar = 0; 将在当前作用域和全局变量栏内创建变量foo。 问题 我正在调试我正在写一个小时左
This question already has an answer here: Multiple left-hand assignment with JavaScript 6 answers It is not okay, since those 2 code examples are not identical. The first one equals to: var b1; b4 = 100; b3 = b4; b2 = b3; b1 = b2; So you only define b1 in the local scope, the b2..b4 are declared globally. Which means this MUST BE completely avoided. I also highly doubt console.log(b1);
这个问题在这里已经有了答案： 使用JavaScript 6多个左侧分配的答案 这是不好的，因为这两个代码示例不相同。 第一个等于： var b1; b4 = 100; b3 = b4; b2 = b3; b1 = b2; 所以你只在本地范围内定义b1 ，全局声明b2..b4 。 这意味着这必须完全避免。 我也非常怀疑console.log(b1); 根据您的示例输出100 。 (function(){ var b1 = b2 = b3 = b4 = 100; })(); console.log(b1); //100 <-- this is not true co
This question already has an answer here: Multiple left-hand assignment with JavaScript 6 answers There is absolutely no reason to prefer the destructuring assignment over simply let x = 'hi', y = x; Not only it's one statement instead of two, but it also avoids extra allocations (the provided solution with destructuring allocates at least one object with no good reason). Yes, it is p
这个问题在这里已经有了答案： 使用JavaScript 6多个左侧分配的答案 绝对没有理由更喜欢简单的解构分配 let x = 'hi', y = x; 它不仅是一个声明而不是两个，但它也避免了额外的分配（所提供的解构解决方案至少分配了一个没有充分理由的对象）。 对的，这是可能的： let x, y; x = y = 'hi'; 它被称为链接赋值，可以为单个值赋予多个变量。 查看更多关于赋值运算符的细节 如果你有两个以上的变量，可以使用数组析构
I have a form to register user with some info. Upon submit, an ajax call is made which inserts the data into the DB, and returns a status code. Depending upon the status, I show a div. The div has an initial class "hidden", and a close button. Upon return from the php, I remove the "hidden" class and add the "alert-danger" or "alert-success" class. On
我有一个表单向用户注册一些信息。 提交后，会进行ajax调用，将数据插入到数据库中，并返回状态码。 根据状态，我显示一个div。 该div有一个“隐藏”的初始类和一个关闭按钮。 从PHP返回后，我删除“隐藏”类并添加“警告 - 危险”或“警告 - 成功”类。 一旦用户点击close（x）按钮，我再次添加“hidden”类，并检查元素是否具有“alert-danger”或“alert-success”类并将其删除。 这是第一次（或至少隐藏）。 但是，div并不是第二次
When I ran my MVC 4 project in Release mode, one page that uses SlickGrid did not display correctly (the grid is very, very tall and the grid cells are missing). However, I do not think this is an issue of SlickGrid, but rather of how the bundler ( System.Web.Optimization that is integrated into MVC 4) minified the code. I grabbed the minified JavaScript and began reversing minification in on
当我在发布模式下运行我的MVC 4项目时，使用SlickGrid的一个页面无法正确显示（网格非常非常高，网格单元格丢失）。 但是，我不认为这是SlickGrid的问题，而是关于如何将捆绑器（集成到MVC 4中的System.Web.Optimization ）缩小代码。 我抓住了缩小的JavaScript，并开始一次性在一个领域缩小缩小范围，直到问题得到解决。 我发现改变（并且原谅滚动，我想完全按原样离开缩小版） function SlickFilter(n,t){var i=n.option,
I am pulling my hair with this simple task... From a php variable that contains double quotes (") which is echoed in a div, the html source shows that " have been replaced by " . So far OK. However, when the html code within the div is copied with jQuery, some of the double quotes are repeated. I need to fix that in order to use MindMup editor properly. $Text = 'This is an
我正在用这个简单的任务拉我的头发......从一个包含双引号（“）的php变量，在div中回显，html源代码显示”已被替换为" 。 到目前为止确定。 但是，当div中的html代码用jQuery复制时，会重复一些双引号。 我需要解决这个问题才能正确使用MindMup编辑器。 $Text = 'This is an <span class="myclass">example</span> where double-quotes are added by "I don't know what".' <a onclick="javascript:co
I'm working on multi-language site based on php. For supporting multi-language, I'm using localizing file like below. [localize.en-US.php] $lang_code = "en-US"; $is_rtl = false; . . . define("WORD_EMAIL", "e-mail"); define("WORD_NAME", "name"); . . . Defined words used by two way like below. [HTML] <?=WORD_EMAIL?> : <input type="text" name="email"/> <?=WORD_NAME
我正在研究基于php的多语言网站。 为了支持多种语言，我使用如下所示的本地化文件。 [localize.en-US.php] $lang_code = "en-US"; $is_rtl = false; . . . define("WORD_EMAIL", "e-mail"); define("WORD_NAME", "name"); . . . 用下面两种方式定义的单词。 [HTML] <?=WORD_EMAIL?> : <input type="text" name="email"/> <?=WORD_NAME?> : <input type="text" name="name"/> [使用Javascri
This question already has an answer here: Get string length in pixels with JavaScript 2 answers Determine Pixel Length of String in Javascript/jQuery? 7 answers Put your text in a <span> and use JavaScript to measure the width of your <span> . HTML: <span id="text">Dummy text</span> JavaScript: var textWidth = document.getElementById("text").clientWidth; jQuer
这个问题在这里已经有了答案： 使用JavaScript 2答案获取字符串长度像素 在Javascript / jQuery中确定字符串的像素长度？ 7个答案 将文本放在<span>并使用JavaScript来测量<span>的宽度。 HTML： <span id="text">Dummy text</span> JavaScript的： var textWidth = document.getElementById("text").clientWidth; jQuery的： $('#text').width(); 您可以创建一些内联元素（例如span ）
If I run this code within the Chrome Developer Tools: var test = (function () { var publicFunction, privateFunction1, privateFunction2; privateFunction1 = function privateFunction1() { return true; }; privateFunction2 = function privateFunction2() { return true; }; publicFunction = function publicFunction() { privateFunction1(); debugger; }; retur
如果我在Chrome开发人员工具中运行此代码： var test = (function () { var publicFunction, privateFunction1, privateFunction2; privateFunction1 = function privateFunction1() { return true; }; privateFunction2 = function privateFunction2() { return true; }; publicFunction = function publicFunction() { privateFunction1(); debugger; }; return { publi