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What's the difference between VARCHAR and CHAR?
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CHAR is fixed length.
If your content is a fixed size, you'll get better performance with CHAR.
See the MySQL page on CHAR and VARCHAR Types for a detailed explanation (be sure to also read the comments).
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allowDefinition='MachineToApplication' error when publishing from VS2010 (but only after a previous
I can run my Asp.Net MVC 2 application without an issue on my local computer. Just Run / Debug.
10 Answers
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C# Object Pooling Pattern implementation
Does anyone have a good resource on implementing a shared object pool strategy for a limited resource in vein of Sql connection pooling? (ie would be implemented fully that it is thread safe).
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How to determine an object's class?
If class B and class C extend class A and I have an object of type B or C , how can I determine of which type it is an instance?
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How to get .pem file from .key and .crt files?
How can I create a PEM file from an SSL certificate?
10 Answers
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What is the use of making constructor private in a class?
Why should we make the constructor private in class? As we always need the constructor to be public.
23 Answers
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Remove white space below image [duplicate]
In Firefox only my video thumbnails are displaying mysterious 2-3 pixels of white space between the bottom of my image and its border (see below).
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栈和队列的面试题Java实现 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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（5）设计含最小函数min()的栈，要求min、push、pop、的时间复杂度都是O(1)
（6）判断栈的push和pop序列是否一致
1、栈的创建：
我们接下来通过链表的形式来创建栈，方便扩充。
代码实现：
public class Stack {
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How can I quickly sum all numbers in a file?
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For a Perl one-liner, it's basically the same thing as the awk solution in Ayman Hourieh's answer:
% perl -nle '$sum += $_ } END { print $sum'
If you're curious what Perl one-liners do, you can deparse them:
% perl -MO=Depar...
npm check and update package if needed
...runner into TeamCity and for that I'd like to give sys-engineers small script (powershell or whatever) that would:
11 Answe...