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What is a mixin, and why are they useful?
...eritance. There are two main situations where mixins are used:
You want to provide a lot of optional features for a class.
You want to use one particular feature in a lot of different classes.
For an example of number one, consider werkzeug's request and response system. I can make a plain old...
How do I return the response from an asynchronous call?
...synchronous code reference
→ If you already understand the problem, skip to the possible solutions below.
The problem
The A in Ajax stands for asynchronous . That means sending the request (or rather receiving the response) is taken out of the normal execution flow. In your example, $.ajax return...
How does a public key verify a signature?
I am trying to get a better grapple on how public/private keys work. I understand that a sender may add a digital signature to a document using his/her private key to essentially obtain a hash of the document, but what I do not understand is how the public key can be used to verify that signature.
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ViewPager and fragments — what's the right way to store fragment's state?
Fragments seem to be very nice for separation of UI logic into some modules. But along with ViewPager its lifecycle is still misty to me. So Guru thoughts are badly needed!
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Which would be better for concurrent tasks on node.js? Fibers? Web-workers? or Threads?
...o and like it a lot. But soon I found out that it lacked badly the ability to perform CPU-intensive tasks. So, I started googling and got these answers to solve the problem: Fibers, Webworkers and Threads (thread-a-gogo). Now which one to use is a confusion and one of them definitely needs to be use...
Error message “Forbidden You don't have permission to access / on this server” [closed]
I have configured my Apache by myself and have tried to load phpMyAdmin on a virtual host, but I received:
34 Answers
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How and/or why is merging in Git better than in SVN?
... version control systems shine, is much better merging than in traditional tools like SVN.
Is this actually due to inherent differences in how the two systems work, or do specific DVCS implementations like Git/Mercurial just have cleverer merging algorithms than SVN?
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What does it mean to “program to an interface”?
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There are some wonderful answers on here to this questions that get into all sorts of great detail about interfaces and loosely coupling code, inversion of control and so on. There are some fairly heady discussions, so I'd like to take the opportunity to break thin...
Easier way to debug a Windows service
Is there an easier way to step through the code than to start the service through the Windows Service Control Manager and then attaching the debugger to the thread? It's kind of cumbersome and I'm wondering if there is a more straightforward approach.
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How to store standard error in a variable
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It would be neater to capture the error file thus:
ERROR=$(</tmp/Error)
The shell recognizes this and doesn't have to run 'cat' to get the data.
The bigger question is hard. I don't think there's an easy way to do it. You'd have to bui...