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How to implement a rule engine?
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This snippet compiles the Rules into fast executable code (using Expression trees) and does not need any complicated switch statements:
(Edit : full working example with generic method)
public Func<User, bool> CompileRule(Rule r)
{
var paramUser = Expression.Parameter(typeof(User));
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Verify version of rabbitmq
How can I verify which version of rabbitmq is running on a server?
11 Answers
11
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当VC问你打算怎么招贤纳士的时候 你该这么答 - 资讯 - 清泛网 - 专注C/C++及内核技术
...应用的经验，因此他们准备拿一部分资金招聘两个手机端iOS工程师。
这听起来不错，于是我问他们：“你们知道要招聘谁吗？”他们的反应是：“你是指具体的某个人吗？”这些创业者与其他初创公司有保持联系，他们并非孤...
When to use actors instead of messaging solutions such as WebSphere MQ or Tibco Rendezvous?
I've already read the question and answers to What design decisions would favour Scala's Actors instead of JMS? .
3 Answer...
get all characters to right of last dash
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You can get the position of the last - with str.LastIndexOf('-'). So the next step is obvious:
var result = str.Substring(str.LastIndexOf('-') + 1);
Correction:
As Brian states below, using this on a string with no dashes will result in the s...
What's the right OAuth 2.0 flow for a mobile app
I am trying to implement delegated authorization in a Web API for mobile apps using OAuth 2.0. According to specification, the implicit grant flow does not support refresh tokens, which means once an access token is granted for an specific period of time, the user must grant permissions to the app a...
Run Java Code Online [closed]
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You can run the current Java 8 version at tryjava8.com
– Shekhar
Jul 9 '13 at 14:18
1
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How to compile python script to binary executable
...e the issue at hand:
pyinstaller oldlogs.py
From the tool's documentation:
PyInstaller analyzes myscript.py and:
Writes myscript.spec in the same folder as the script.
Creates a folder build in the same folder as the script if it does not exist.
Writes some log files and workin...
Mock framework vs MS Fakes frameworks
...owever the approach is different, Fakes generates code to achive this functionality but Mocks framework does not. So is my understanding correct? Is Fakes just another Mock framework
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Loading and parsing a JSON file with multiple JSON objects
...t is not a valid JSON value as there is no top-level list or object definition.
Note that because the file contains JSON per line, you are saved the headaches of trying to parse it all in one go or to figure out a streaming JSON parser. You can now opt to process each line separately before moving ...