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Difference between float and decimal data type
...s are required of the DB engine to convert the "number" into something the CPU recognizes as a number. No rounding, no conversion errors, it's a real number the CPU can manipulate.
Calculations on this arbitrarily large integer must be done in software, as there is no hardware support for this kin...
ZeroMQ的学习和研究（PHP代码实例） - C/C++ - 清泛网 - 专注C/C++及内核技术
...订阅者，必然会丢失掉一部分信息，这是这个模式的一个问题，所谓的 Slow joiner。稍后，会解决这个问题。
d) 但是，如果 Publisher 中途离开，所有的 Subscriber 会 hold 住，等待 Publisher 再上线的时候，会继续接受信息。
ZMQ 的 PipeL...
Are there any downsides to passing structs by value in C, rather than passing a pointer?
...cc on x86_64. Anyone is welcome to add other architectures like MSVC, ARM, etc.)
Let's have our example program:
// foo.c
typedef struct
{
double x, y;
} point;
void give_two_doubles(double * x, double * y)
{
*x = 1.0;
*y = 2.0;
}
point give_point()
{
point a = {1.0, 2.0};
r...
How to simulate Android killing my process
... is in the background and the OS decides it needs the resources (RAM, CPU, etc.). I need to be able to simulate this behaviour during testing so that I can ensure that my application is behaving correctly. I want to be able to do this in an automated way so that I can test if the application behaves...
What is the difference between memoization and dynamic programming?
...? I will take over India first. I will become the Chief Minister of Delhi, etc. etc.
Bottom-up - You say I will become the CM of Delhi. Then will take over India, then all other countries in Asia and finally I will take over the world.
...
What is a plain English explanation of “Big O” notation?
... have polynomial complexity or is solvable in polynomial time.
O(n), O(n2) etc. are all polynomial time. Some problems cannot be solved in polynomial time. Certain things are used in the world because of this. Public Key Cryptography is a prime example. It is computationally hard to find two prime f...
How is TeamViewer so fast?
...ktop usage is linear movement of elements (scrolling text, moving windows, etc. opposed to transformation of elements).
The DirectX 3D performance of 1 FPS seems to confirm my guess to some extent.
share
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Why does Windows64 use a different calling convention from all other OSes on x86-64?
...of instruction encoding (the MOD R/M byte, see http://www.c-jump.com/CIS77/CPU/x86/X77_0060_mod_reg_r_m_byte.htm), register numbers 0...7 are - in that order - ?AX, ?CX, ?DX, ?BX, ?SP, ?BP, ?SI, ?DI.
Hence choosing A/C/D (regs 0..2) for return value and the first two arguments (which is the "classic...
Greenlet Vs. Threads
...to concurrency are usually projects like Twisted, libevent, libuv, node.js etc, where all your code shares the same execution context, and register event handlers.
It's an excellent idea to use greenlets (with appropriate networking support such as through gevent) for writing a proxy, as your handl...
Gunicorn worker timeout error
...hronous workers assume that your application is resource-bound in terms of CPU and network bandwidth. Generally this means that your application shouldn’t do anything that takes an undefined amount of time. An example of something that takes an undefined amount of time is a request to the internet...