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Are Exceptions in C++ really slow
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The main model used today for exceptions (Itanium ABI, VC++ 64 bits) is the Zero-Cost model exceptions.
The idea is that instead of losing time by setting up a guard and explicitly checking for the presence of exceptions everywhere, the compiler generates a side table that maps any po...
C pointer to array/array of pointers disambiguation
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445
int* arr[8]; // An array of int pointers.
int (*arr)[8]; // A pointer to an array of integers
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Python speed testing - Time Difference - milliseconds
...atetime.now()
>>> c = b - a
>>> c
datetime.timedelta(0, 4, 316543)
>>> c.days
0
>>> c.seconds
4
>>> c.microseconds
316543
Be aware that c.microseconds only returns the microseconds portion of the timedelta! For timing purposes always use c.total_second...
How to construct a std::string from a std::vector?
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sanyash
6,5241111 gold badges1818 silver badges4242 bronze badges
answered Feb 25 '11 at 8:46
GregGreg
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How to insert an item into an array at a specific index (JavaScript)?
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4974
What you want is the splice function on the native array object.
arr.splice(index, 0, item);...
How to find time complexity of an algorithm
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405
How to find time complexity of an algorithm
You add up how many machine instructions it w...
What are the Ruby Gotchas a newbie should be warned about? [closed]
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edited May 7 '12 at 15:54
community wiki
4 re...
Git mergetool with Meld on Windows
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Lyndon White
22.9k1414 gold badges7676 silver badges119119 bronze badges
answered Mar 2 '15 at 23:50
AruginArugin
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开源邮件传输代理软件 -- Postfix 介绍 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...支持/var[/spool]/mail、/etc/aliases、 NIS、和 ~/.forward 文件。
4. 更健壮：
postfix被设计成在重负荷之下仍然可以正常工作。当系统运行超出了可用的内存或磁盘空间时，postfix会自动减少运行进程的数目。当处理的邮件数目增长时，...
TCP 的那些事儿（上） - 更多技术 - 清泛网 - 专注C/C++及内核技术
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很多人会问，为什么建链接要3次握手，断链接需要4次挥手？
对于建链接的3次握手，主要是要初始化Sequence Number 的初始值。通信的双方要互相通知对方自己的初始化的Sequence Number（缩写为ISN：Inital Sequence Number）——所...