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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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What online brokers offer APIs? [closed]
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IB does seem to be the best option, and so far the only one with a wide range of language support.
– Wilco
Sep 29 '08 at 15:42
1
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How to dismiss ViewController in Swift?
...s a ViewController in swift by calling dismissViewController in an IBAction
20 Answers
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Save string to the NSUserDefaults?
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As of iOS 12, calling synchronize is no longer needed: stackoverflow.com/a/57218546/12484
– Jon Schneider
Aug 9 at 22:07
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What's the difference between QMainWindow, QWidget and QDialog?
... to be shown as a window. It will always appear in a window, and has functions to make it work well with common buttons on dialogs (accept, reject, etc.).
QMainWindow is designed around common needs for a main window to have. It has predefined places for a menu bar, a status bar, a toolbar, and o...
Check whether or not the current thread is the main thread
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Have a look at the NSThread API documentation.
There are methods like
- (BOOL)isMainThread
+ (BOOL)isMainThread
and + (NSThread *)mainThread
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How to print to the console in Android Studio?
I just downloaded Android Studio for Linux from:
http://developer.android.com/sdk/installing/studio.html
7 Answers
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How do I remove a MySQL database?
You may notice from my last question that a problem caused some more problems, Reading MySQL manuals in MySQL monitor?
6 A...
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10 款进阶综合应用：业务流程与硬件接入 · App Inventor 2 中文网
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