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领域驱动设计系列（三）:事件驱动上 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ce emailService, IEquipmentRepository equipmentRepository)
{
_emailService = emailService;
_equipmentRepository = equipmentRepository;
}
为何用事件？
SRP （单一职责)
比如我们一个会议室预定系统，我们的一个设备坏了。我们需要通知...
Undefined reference to symbol X509_free - C/C++ - 清泛网 - 专注C/C++及内核技术
Undefined reference to symbol X509_freeundefined-reference-to-symbol-x509-freeUndefined reference to symbol X509_free 编译错误的解决方法：链接库中增加 -lcrypto，而非 -lcrypt参考：https: stackoverflow com questions 33215936 undefined-reference-to-symbol-x509-freeUndefined refer...
How do I create a WPF Rounded Corner container?
...bject (BorderThickness or CornerRadius) you can specify a single number if all 4 are the same, such as CornerRadius="8".
– Santiago Palladino
Sep 23 '08 at 13:14
3
...
How to prettyprint a JSON file?
...mend using python3 -m json.tool <IN >OUT, as this keeps the original order of the fields in JSON dicts. The python interpreter version 2 sorts the fields in alphabetically ascending order, which often is not, what you want.
– Kai Petzke
Jan 20 '19 at 17:0...
How to export iTerm2 Profiles
...tory(which doesn't need to have an existing preferences file there yet) in order to save the preferences in the future. After that, the button Save Current Settings to Folder will become active.
– inexcii
Aug 11 '16 at 12:28
...
Why does dividing two int not yield the right value when assigned to double?
... division version of operator/, which takes 2 ints and returns an int. In order to use the double version, which returns a double, at least one of the ints must be explicitly casted to a double.
c = a/(double)b;
share
...
SQL Logic Operator Precedence: And and Or
...End -- outputs F
For those who like to consult references (in alphabetic order):
Microsoft Transact-SQL operator precedence
Oracle MySQL 9 operator precedence
Oracle 10g condition precedence
PostgreSQL operator Precedence
SQL as understood by SQLite
...
Bash if statement with multiple conditions throws an error
...ions.
tldp.org/LDP/Bash-Beginners-Guide/html/sect_07_01.html
Update
Actually you could still use && and || with the -eq operation. So your script would be like this:
my_error_flag=1
my_error_flag_o=1
if [ $my_error_flag -eq 1 ] || [ $my_error_flag_o -eq 2 ] || ([ $my_error_flag -eq 1 ] ...
How do I replace a character at a particular index in JavaScript?
...T1: 195ms
TEST2: 6ms
It seems that array conversion beats substring by 2 orders of magnitude! So - what the hell happened here???
What actually happens is that all operations in TEST2 are done on array itself, using assignment expression like strarr2[p] = n. Assignment is really fast compared to ...
Can we make unsigned byte in Java
...28). However, there's nothing to stop you downcasting an int (or short) in order to achieve this:
int i = 200; // 0000 0000 0000 0000 0000 0000 1100 1000 (200)
byte b = (byte) 200; // 1100 1000 (-56 by Java specification, 200 by convention)
/*
* Will print a negative int -56 because upcasting byt...