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Makefile经典教程（入门必备） - C/C++ - 清泛网移动版 - 专注C/C++及内核技术
...找寻的过程中，如果出现错误，比如最后被依赖的文件找不到，那么make就会直接退出，并报错，而对于所定义的命令的错误，或是编译不成功，make根本不理。make只管文件的依赖性，即，如果在我找了依赖关系之后，冒号后面的...
构建高并发高可用的电商平台架构实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...应用场景非常多，比如系统的监控动态的实时曲线绘制，手机消息的推送，web实时聊天等。
实时推送有很多技术可以实现，有Comet方式，有websocket方式等。
Comet基于服务器长连接的“服务器推”技术，包含两种：
Long Polling：...
AI助手重构版问题记录 - AI 助手 - 清泛IT社区，为创新赋能！
...bel","name": "TitleLabel","parent": "MainLayout","properties":{"Text": "BLE蓝牙低功耗演示","FontSize": 24,"FontBold":true,"Width": -2,"TextAlignment": 1}},{"action": "ADD_COMPONENT","type": "HorizontalArrangement","name": "ScanButtonLayout","parent": "MainLayout","properties":{"Width": -2}},{...
Unique combination of all elements from two (or more) vectors
... what you are after
> expand.grid(a,b)
Var1 Var2
1 ABC 2012-05-01
2 DEF 2012-05-01
3 GHI 2012-05-01
4 ABC 2012-05-02
5 DEF 2012-05-02
6 GHI 2012-05-02
7 ABC 2012-05-03
8 DEF 2012-05-03
9 GHI 2012-05-03
10 ABC 2012-05-04
11 DEF 2012-05-04
12 GHI 2012-05-04
13 ABC 20...
What killed my process and why?
...imestamps
– gukoff
Nov 22 '17 at 11:05
If you only want to see a list of recently killed process on a server, try usin...
Fast way of counting non-zero bits in positive integer
...
b'\x01\x02\x02\x03\x02\x03\x03\x04\x02\x03\x03\x04\x03\x04\x04\x05'
b'\x01\x02\x02\x03\x02\x03\x03\x04\x02\x03\x03\x04\x03\x04\x04\x05'
b'\x02\x03\x03\x04\x03\x04\x04\x05\x03\x04\x04\x05\x04\x05\x05\x06'
b'\x01\x02\x02\x03\x02\x03\x03\x04\x02\x03\x03\x04\x03\...
What is the maximum possible length of a .NET string?
...of a string.
The test starts ...now:
s.Length = 1000000000 at 08/05/2019 12:06
Exception of type 'System.OutOfMemoryException' was thrown. at
08/05/2019 12:06. After decimation, the value of Increment is
100000000.
Exception of type 'System.OutOfMemoryException' was thrown. a...
How to calculate age (in years) based on Date of Birth and getDate()
...---------------------------------- ---------------- ----------------
17.767054 18 17
(1 row(s) affected)
UPDATE here are some more accurate methods:
BEST METHOD FOR YEARS IN INT
DECLARE @Now datetime, @Dob datetime
SELECT @Now='1990-05-05', @Dob='...
JavaScript loop through json array?
...his:
var json = [{
"id" : "1",
"msg" : "hi",
"tid" : "2013-05-05 23:35",
"fromWho": "hello1@email.se"
},
{
"id" : "2",
"msg" : "there",
"tid" : "2013-05-05 23:45",
"fromWho": "hello2@email.se"
}];
You can loop over the Array like this:
for(var i = 0; i <...
Saving utf-8 texts in json.dumps as UTF8, not as \u escape sequence
... d
{1: '\xd7\x91\xd7\xa8\xd7\x99 \xd7\xa6\xd7\xa7\xd7\x9c\xd7\x94', 2: u'\u05d1\u05e8\u05d9 \u05e6\u05e7\u05dc\u05d4'}
>>> s=json.dumps(d, ensure_ascii=False, encoding='utf8')
>>> s
u'{"1": "\u05d1\u05e8\u05d9 \u05e6\u05e7\u05dc\u05d4", "2": "\u05d1\u05e8\u05d9 \u05e6\u05e7\u05dc\...