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What are sessions? How do they work?

...lication development, using python. I am coming across the terms 'cookies' and 'sessions'. I understand cookies in that they store some info in a key value pair on the browser. But I have a little confusion regarding sessions, in a session too we store data in a cookie on the user's browser. ...
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What is the purpose of Serialization in Java?

I have read quite a number of articles on Serialization and how it is so nice and great but none of the arguments were convincing enough. I am wondering if someone can really tell me what is it that we can really achieve by serializing a class? ...
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Are the shift operators () arithmetic or logical in C?

... When shifting left, there is no difference between arithmetic and logical shift. When shifting right, the type of shift depends on the type of the value being shifted. (As background for those readers unfamiliar with the difference, a "logical" right shift by 1 bit shifts all the bits ...
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Bamboo Vs. Hudson(a.k.a. Jenkins) vs Any other CI systems [closed]

Anyone out there have experience with both Hudson and Bamboo? Any thoughts on the relative strengths and weaknesses of these products? ...
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LINQ-to-SQL vs stored procedures? [closed]

... Some advantages of LINQ over sprocs: Type safety: I think we all understand this. Abstraction: This is especially true with LINQ-to-Entities. This abstraction also allows the framework to add additional improvements that you can easily take advantage of. PLINQ is an example of adding multi-thre...
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Is it possible to target older iOS versions when using Xcode 4.2 and iOS 5 SDK?

I just recently downloaded the Xcode 4.2 with iOS 5 SDK package and I immediately noticed that I am unable to use my iPhone 3Gs with iOS 4.2.1 for debugging. I am only able to debug and test on my iphone 4 with iOS 5 installed. ...
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What is the result of % in Python?

...odulo operator always yields a result with the same sign as its second operand (or zero); the absolute value of the result is strictly smaller than the absolute value of the second operand [2]. Taken from http://docs.python.org/reference/expressions.html Example 1: 6%2 evaluates to 0 because the...
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Confused about stdin, stdout and stderr?

I am rather confused with the purpose of these three files. If my understanding is correct, stdin is the file in which a program writes into its requests to run a task in the process, stdout is the file into which the kernel writes its output and the process requesting it accesses the informatio...
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Why use bzero over memset?

...ucts, like sock_addr_in , or char buffers (that we used to send data back and forth between client and server) the professor instructed us to only use bzero and not memset to initialize them. He never explained why, and I'm curious if there is a valid reason for this? ...
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Which websocket library to use with Node.js? [closed]

...answer. Feel free to edit me with your improvements. ws WebSocket server and client for node.js. One of the fastest libraries if not the fastest one. websocket-node WebSocket server and client for node.js websocket-driver-node WebSocket server and client protocol parser node.js - used in faye-webs...