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What is a handle in C++?
I have been told that a handle is sort of a pointer, but not, and that it allows you to keep a reference to an object, rather than the object itself. What is a more elaborate explanation?
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Socket.IO Authentication
I am trying to use Socket.IO in Node.js, and am trying to allow the server to give an identity to each of the Socket.IO clients. As the socket code is outside the scope of the http server code, it doesn't have easy access to the request information sent, so I'm assuming it will need to be sent up d...
How do I make a checkbox required on an ASP.NET form?
I've done some searching on this, and I've found several partial answers, however nothing that gives me that warm fuzzy "this is the right way to do this". To answer the most frequently occurring complaint against this question: "checkboxes can have two legitimate states - checked and unchecked", th...
Iterate over object attributes in python
I have a python object with several attributes and methods. I want to iterate over object attributes.
8 Answers
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二维码的生成细节及原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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首先，我们先说一下二维码一共有40个尺寸。官方叫版本Version。Version 1是21 x 21的矩阵，Version 2是 25 x 25的矩阵，Version 3是29的尺寸，每增加一个version，就会增加4的尺寸，公式是：(V-1)*4 + 21（V是版本号） 最高Version 40，(40-1)*4+21 =...
PowerShell script to return versions of .NET Framework on a machine?
What would a PowerShell script be to return versions of the .NET Framework on a machine?
16 Answers
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How to get an object's property's value by property name?
In PowerShell, how do you get an object's property value by specifying its name (a string)? I want something like the following:
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What is the best way to get all the divisors of a number?
Here's the very dumb way:
16 Answers
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How do I rename a repository on GitHub?
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Vagrant stuck connection timeout retrying
My vagrant was working perfectly fine last night. I've just turned the PC on, hit vagrant up , and this is what I get:
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