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C++模板的特化 - C/C++ - 清泛网 - 专注C/C++及内核技术
...的吧,呵呵。下面是我搞出来的几种特殊情况,它们都是正确的:
template<typename T1, typename T2>
class X {};
template<typename T>
class X<vector<T>, T&> {};
template<typename T>
class X<vector<T>, int&> {};
template<>
class X<vector<double>, int&> {};
template<ty...
TCP 的那些事儿(上) - 更多技术 - 清泛网 - 专注C/C++及内核技术
...到connection time out的错误)(如果你想观摩一下Linux的内核代码,请参看源码 tcp_timewait_state_process)。
关于tcp_max_tw_buckets。这个是控制并发的TIME_WAIT的数量,默认值是180000,如果超限,那么,系统会把多的给destory掉,然...
【BLE技术内幕】BLE技术揭秘 - 创客硬件开发 - 清泛IT论坛,有思想、有深度
...优化考量在许多应用中,从机跳过最大连接事件数。选择正确的连接参数组在低功耗蓝牙设备的功率优化中起重要作用。以下列表给出了连接参数设置中权衡的总体概述。减少连接间隔如下:增加两个设备的功耗增加双向吞吐量...
转型产品经理必看 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...和定义、关注产品需要实现的业务目标,在保证实现一个正确功能的前提下更多的思考这个功能的业务目标是什么,不以结婚为目的的谈恋爱都是耍流氓,不以实现业务目标为目的的产品设计都是扯淡。
功能思维下的产品产出...
What's the difference between __PRETTY_FUNCTION__, __FUNCTION__, __func__?
...en it is used inside of a function. It was added to C in C99. From C99 §6.4.2.2/1:
The identifier __func__ is implicitly declared by the translator as if, immediately following the opening brace of each function definition, the declaration
static const char __func__[] = "function-name";
appeare...
C++ preprocessor __VA_ARGS__ number of arguments
... PP_ARG_N(__VA_ARGS__)
#define PP_ARG_N( \
_1, _2, _3, _4, _5, _6, _7, _8, _9,_10, \
_11,_12,_13,_14,_15,_16,_17,_18,_19,_20, \
_21,_22,_23,_24,_25,_26,_27,_28,_29,_30, \
_31,_32,_33,_34,_35,_36,_37,_38,_39,_40, \
_41,_42,_43,_44,_45,_46,_47,_48,_49,_50...
Why does the C preprocessor interpret the word “linux” as the constant “1”?
...
967
In the Old Days (pre-ANSI), predefining symbols such as unix and vax was a way to allow code to...
Understanding the difference between __getattr__ and __getattribute__
... Alois Mahdal
8,75355 gold badges4545 silver badges6767 bronze badges
answered Nov 28 '10 at 6:55
pyfuncpyfunc
58.3k1414 gold bad...
What is the most efficient/elegant way to parse a flat table into a tree?
...
462
Now that MySQL 8.0 supports recursive queries, we can say that all popular SQL databases suppor...
