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When is it better to use an NSSet over an NSArray?
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When the order of the items in the collection is not important, sets offer better performance for finding items in the collection.
The reason is that a set uses hash values to find items (like a dictionary) while an array has to iter...
Why it's not possible to use regex to parse HTML/XML: a formal explanation in layman's terms
There is no day on SO that passes without a question about parsing (X)HTML or XML with regular expressions being asked.
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Difference between application/x-javascript and text/javascript content types
...lete, and application/x-javascript was experimental (hence the x- prefix) for a transitional period until application/javascript could be standardised.
You should use application/javascript. This is documented in the RFC.
As far a browsers are concerned, there is no difference (at least in HTTP h...
C# 能否获取一个对象所占内存的大小？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
...有人提出使用二进制序列化，将一个对象序列化成一个MemoryStream，然后返回MemoryStream.Length,经过验证是不可以的。
验证代码如下：
[Serializable]
public class Student
{
private static long GetObjectSize(object o)
{
using (va...
Best practice to run Linux service as a different user
...es default to starting as root at boot time on my RHEL box. If I recall correctly, the same is true for other Linux distros which use the init scripts in /etc/init.d .
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Classes residing in App_Code is not accessible
...pages. Does something need to be configured to allow this? I have made it work in previous projects, but not in this one, somehow.
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Good tutorial for using HTML5 History API (Pushstate?) [closed]
I am looking into using the HTML5 History API to resolve deep linking problems with AJAX loaded content, but I am struggling to get off the ground. Does any one know of any good resources?
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How can I use PowerShell with the Visual Studio Command Prompt?
I've been using Beta 2 for a while now and it's been driving me nuts that I have to punt to cmd.exe when running the VS2010 Command Prompt. I used to have a nice vsvars2008.ps1 script for Visual Studio 2008. Anyone have a vsvars2010.ps1 or something similar?
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How to allow http content within an iframe on a https site
...ut when a file referenced is using http, not https, I get the following error:
9 Answers
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How to clean node_modules folder of packages that are not in package.json?
...nstall project packages with npm install that looks into package.json for modules to be installed. After a while I see that I don't need some specific module and remove its dependency from package.json . Then I remove some other modules from package.json because they are not needed anymore an...