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Node.js / Express.js - How does app.router work?

...routes. Note that if you don't explicitly use the router, it is implicitly added by Express at the point you define a route (which is why your routes still worked even though you commented out app.use(app.router)). A commenter has brought up another point about the order of static and router that I...
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How to convert enum value to int?

...etValue(); } (I've changed the names to be a bit more conventional and readable, btw.) This is assuming you want the value assigned in the constructor. If that's not what you want, you'll need to give us more information. ...
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How do I show/hide a UIBarButtonItem?

...ave your button in a strong outlet (let's call it myButton) and do this to add/remove it: // Get the reference to the current toolbar buttons NSMutableArray *toolbarButtons = [self.toolbarItems mutableCopy]; // This is how you remove the button from the toolbar and animate it [toolbarButtons remov...
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Create an empty data.frame

...data.frame with an empty column of the wrong type does not prevent further additions of rows having columns of different types. This method is just a bit safer in the sense that you'll have the correct column types from the beginning, hence if your code relies on some column type checking, it will w...
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How do I get the difference between two Dates in JavaScript?

... Vincent RobertVincent Robert 32.2k1111 gold badges7676 silver badges113113 bronze badges ...
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How can I import Swift code to Objective-C?

...e mistake of using the class name. This single file is an autogenerated header that defines Objective-C interfaces for all Swift classes in your project that are either annotated with @objc or inherit from NSObject. Considerations: If your target name contains spaces, replace them with underscor...
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Why is it impossible to override a getter-only property and add a setter? [closed]

...use the writer of Baseclass has explicitly declared that Bar has to be a read-only property. It doesn't make sense for derivations to break this contract and make it read-write. I'm with Microsoft on this one. Let's say I'm a new programmer who has been told to code against the Baseclass derivation...
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Display date/time in user's locale format and time offset

... would come from the server. // Also, this whole block could probably be made into an mktime function. // All very bare here for quick grasping. d = new Date(); d.setUTCFullYear(2004); d.setUTCMonth(1); d.setUTCDate(29); d.setUTCHours(2); d.setUTCMinutes(45); d.setUTCSeconds(26); console...
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CALayers didn't get resized on its UIView's bounds change. Why?

I have a UIView which has about 8 different CALayer sublayers added to its layer. If I modify the view's bounds (animated), then the view itself shrinks (I checked it with a backgroundColor ), but the sublayers' size remains unchanged . ...
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Java List.add() UnsupportedOperationException

I try to add objects to a List<String> instance but it throws an UnsupportedOperationException . Does anyone know why? ...