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Why does base64 encoding require padding if the input length is not divisible by 3?
What is the purpose of padding in base64 encoding. The following is the extract from wikipedia:
3 Answers
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Disadvantages of Test Driven Development? [closed]
...the actual implementation, but for complicated cases you lose much more.
Additional Complexity. For complex cases your test cases are harder to calculate, I'd suggest in cases like that to try and use automatic reference code that will run in parallel in the debug version / test run, instead of the ...
The Definitive C++ Book Guide and List
...n the language in a very accessible format and in great detail. The fifth edition (released August 16, 2012) covers C++11. [Review]
* Not to be confused with C++ Primer Plus (Stephen Prata), with a significantly less favorable review.
Programming: Principles and Practice Using C++ (Bjarne Stroustru...
Best architectural approaches for building iOS networking applications (REST clients)
...e experience and this question is really interesting to me. I saw a lot of different resources and materials on this topic, but nevertheless I'm still confused. What is the best architecture for an iOS networked application? I mean basic abstract framework, patterns, which will fit every networking ...
What is the dependency inversion principle and why is it important?
...ons.
As to why it is important, in short: changes are risky, and by depending on a concept instead of on an implementation, you reduce the need for change at call sites.
Effectively, the DIP reduces coupling between different pieces of code. The idea is that although there are many ways of implem...
How to count the number of set bits in a 32-bit integer?
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This is known as the 'Hamming Weight', 'popcount' or 'sideways addition'.
The 'best' algorithm really depends on which CPU you are on and what your usage pattern is.
Some CPUs have a single built-in instruction to do it and others have parallel instructions which act on bit vectors. The pa...
How does data binding work in AngularJS?
How does data binding work in the AngularJS framework?
14 Answers
14
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深入理解 x86/x64 的中断体系 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...表。不再称为 IVT 而是 IDT。那是因为：
在实模式下，DITR.base 指向的表格项直接给出中断服务例程（Interrupt Service Routine）的入口地址。
在保护模式下，并不直接给出入口地址，而是门描述符（Interrupt/Trap/Task gate），从这些门...
What are the calling conventions for UNIX & Linux system calls (and user-space functions) on i386 an
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Further reading for any of the topics here: The Definitive Guide to Linux System Calls
I verified these using GNU Assembler (gas) on Linux.
Kernel Interface
x86-32 aka i386 Linux System Call convention:
In x86-32 parameters for...
NOT using repository pattern, use the ORM as is (EF)
... use of it and my implementation of “Unit Of Work”. The more I started digging I started asking myself the question: "Do I really need it?"
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