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Is double square brackets [[ ]] preferable over single square brackets [ ] in Bash?
... @guns: Even if bash is installed on my box, it might not be executing the script (I might have /bin/sh symlinked to some dash-variant, as is standard on FreeBSD and Ubuntu). There's additional weirdness with Busybox, too: with standard compilation options nowadays, it parses [[ ]] but interprets it...
How do I count a JavaScript object's attributes? [duplicate]
... (var k in foo) {
if (foo.hasOwnProperty(k)) {
++count;
}
}
alert("Found " + count + " properties specific to foo");
The second line shows how other code can add properties to all Object derivatives. If you remove the hasOwnProperty() check inside the loop, the property count will g...
Show or hide element in React
...actDOM.render(<Search />, document.querySelector("#container"))
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.13.1/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.13.1/umd/react-dom.production.min.js">&l...
Visual SVN 安装及客户端使用 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...负责代码编写，所以也是只读权限。而Developer1和manager1是开发人员和项目经理，自然具有读、写的权限。
在实际的项目开发过程中，Developer和tester往往不可能只有一个人，这时候使用组来授权更加方便，这个大家可以自己练习...
What is DOM Event delegation?
...is event delegation. Here's an example of it in practice:
<ul onclick="alert(event.type + '!')">
<li>One</li>
<li>Two</li>
<li>Three</li>
</ul>
With that example if you were to click on any of the child <li> nodes, you would see an...
How can I sanitize user input with PHP?
...re is a built-in FILTER_VALIDATE_EMAIL type
My own filter class (uses JavaScript to highlight faulty fields) can be initiated by either an ajax request or normal form post. (see the example below)
/**
* Pork.FormValidator
* Validates arrays or properties by setting up simple arrays.
* ...
How may I sort a list alphabetically using jQuery?
...ng references to the elements are lost. All event listeners bound from JavaScript are lost. It would be better to store the elements instead of innerHTML, use a sort function (vals.sort(function(a, b) {return b.innerHTML < a.innerHTML;})) and appendChild to move elements.
– ...
CSRF protection with CORS Origin header vs. CSRF token
...ted.
But what about other kinds of requests - e.g. form submit? Loading a script/img/... tag? Or any other way a page can use to (legally) create a request? Or maybe some known JS hack?
The Origin header is normally only sent for XHR cross-domain requests. Image requests do not contain the header....
Visual Studio Project vs. Solution
...elevant bits here:
When you create an app, application, website, Web App, script, plug-in, etc in Visual Studio, you start with a project. In a logical sense, a project contains of all the source code files, icons, images, data files and anything else that will be compiled into an executable progra...
Set cursor position on contentEditable
...set);
} else {
// Failure here, not handled by the rest of the script.
// Probably IE or some older browser
}
};
// Recalculate selection while typing
editable.onkeyup = captureSelection;
// Recalculate selection after clicking/drag-selecting
editable.onmousedown = function...