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OceanBase使用libeasy原理源码分析：客户端 - 数据库(内核) - 清泛网 - 专...
...easy的如下两个上层接口：
easy_session_t *easy_session_create(int64_t asize)
int easy_client_dispatch(easy_io_t *eio, easy_addr_t addr, easy_session_t *s)
首先看看session这个关键的数据结构：
#define EASY_MESSAGE_SESSION_HEADER \
easy_connection_t *c; \
easy...
What is better, adjacency lists or adjacency matrices for graph problems in C++?
... a list takes up more memory than a matrix:
8e > n2/8 when d > 1/64
So with these numbers (still 32-bit specific) the breakpoint lands at 1/64.
If the density (e/n2) is bigger than 1/64, then a matrix is preferable if you want to save memory.
You can read about this at wikipedia (artic...
Scala list concatenation, ::: vs ++
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84
::: works only with lists, while ++ can be used with any traversable. In the current implementa...
IOS7 : UIScrollView offset in UINavigationController
...much for this post!!!!!!! Apple and apple?
– user779764
Feb 16 '14 at 1:11
I found that this caused my UIScrollView's ...
'typeid' versus 'typeof' in C++
...
AraKAraK
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Bootstrap combining rows (rowspan)
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84
You should use bootstrap column nesting.
See Bootstrap 3 or Bootstrap 4:
<div class="row"&...
How to vertically center a container in Bootstrap?
...
Hashem QolamiHashem Qolami
84.1k2323 gold badges123123 silver badges142142 bronze badges
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Hashing a dictionary?
..._dict__)) # 1209812346789
foo.a = 1
print (make_hash(foo.__dict__)) # -78956430974785
Alas, when you attempt to do the same thing with the class itself:
print (make_hash(Foo.__dict__)) # TypeError: unhashable type: 'dict_proxy'
The class __dict__ property is not a normal dictionary:
print (typ...
How to identify platform/compiler from preprocessor macros?
...
__MINGW64__ is also available when one uses mingw64
– scones
Jun 7 '14 at 11:40
2
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How many bytes does one Unicode character take?
...Nº: 8364
UTF-8: E2 82 AC
UTF-16: 20 AC
U+2122 TRADE MARK SIGN: ™
Nº: 8482
UTF-8: E2 84 A2
UTF-16: 21 22
U+2603 SNOWMAN: ☃
Nº: 9731
UTF-8: E2 98 83
UTF-16: 26 03
U+260E BLACK TELEPHONE: ☎
Nº: 9742
UTF-8: E2 98 8E
UTF-16: 26 0E
U+2614 UMBRELLA WITH RAIN DROPS: ☔
Nº: 9748
UTF-8: E2...