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Understand the “Decorator Pattern” with a real world example
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From another perspective this is not even close to "real world". In the real world you should not recompile each time you need to add a new topping in menu (or change the price). Toppings are (usually) stored in database and ...
Passing arguments to angularjs filters
... which has your parameter in its scope as well as the original item coming from the filter.
It took me 2 days to realise you can do this, haven't seen this solution anywhere yet.
Checkout Reverse polarity of an angular.js filter to see how you can use this for other useful operations with filter.
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Determine if Python is running inside virtualenv
....base_prefix is the prefix of the system Python the virtualenv was created from.
The above always works for Python 3 stdlib venv and for recent virtualenv (since version 20). Older versions of virtualenv used sys.real_prefix instead of sys.base_prefix (and sys.real_prefix did not exist outside a vir...
WebApi's {“message”:“an error has occurred”} on IIS7, not in IIS Express
...got a measly an error has occurred message. I guess the accepted answer is from 3 years ago which is a long time in the web word nowadays. I'm using Web API 2 and ASP.NET 5 (MVC 5) and Microsoft has moved away from an IIS-only strategy, while CustomErrors is old skool IIS ;).
Anyway, I had an issue...
Is it possible to have two partial classes in different assemblies represent the same class?
...y definition complete.
In MVC terms, you want to keep view code separate from model code, yet enable certain kinds of UI based on model properties. Check out Martin Fowler's excellent overview of the different flavours of MVC, MVP and whatnot: you'll find design ideas aplenty. I suppose you could ...
Multiple arguments to function called by pthread_create()?
...juice, It doesn't work for me. I see compilation error: invalid conversion from ‘void*’ to ‘arg_struct*’.
– Neshta
Oct 15 '14 at 17:17
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Conversion from Long to Double in Java
...could simply do :
double d = (double)15552451L;
Or you could get double from Long object as :
Long l = new Long(15552451L);
double d = l.doubleValue();
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Changing UIImage color
...e.width, image.size.height));
UIImage *coloredImg = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
Swift:
let color: UIColor = <# UIColor #>
let image: UIImage = <# UIImage #> // Image to mask with
UIGraphicsBeginImageContextWithOptions...
What is the difference between “text” and new String(“text”)?
...inct instance of a String object; String s = "text"; may reuse an instance from the string constant pool if one is available.
You very rarely would ever want to use the new String(anotherString) constructor. From the API:
String(String original) : Initializes a newly created String object so th...
Understanding the Rails Authenticity Token
...red in the session, the client cannot know its value. This prevents people from submitting forms to a Rails app without viewing the form within that app itself.
Imagine that you are using service A, you logged into the service and everything is ok. Now imagine that you went to use service B, and you...