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Utility classes are evil? [closed]
... good object-oriented design, most classes should represent a single thing and all of its attributes and operations. If you are operating on a thing, that method should probably be a member of that thing.
However, there are times when you can use utility classes to group a number of methods togethe...
How to programmatically take a screenshot on Android?
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Here is the code that allowed my screenshot to be stored on an SD card and used later for whatever your needs are:
First, you need to add a proper permission to save the file:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
And this is the code (running in a...
Handle spring security authentication exceptions with @ExceptionHandler
I'm using Spring MVC's @ControllerAdvice and @ExceptionHandler to handle all the exception of a REST Api. It works fine for exceptions thrown by web mvc controllers but it does not work for exceptions thrown by spring security custom filters because they run before the controller methods are inv...
Why do objects of the same class have access to each other's private data?
...specification, which is why it even has its own dedicated chapter in the standard (11.5). But still any per-object features described there are rather rudimentary. Again, access control in C++ is meant to work on per-class basis.
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Using curl to upload POST data with files
... I'm confused by the part about url-encoding the file. I have uploaded JPG and PNG files like this without modifying them, without any problems.
– Deanna Gelbart
May 16 '13 at 0:27
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Showing the stack trace from a running Python application
I have this Python application that gets stuck from time to time and I can't find out where.
28 Answers
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__getattr__ on a module
...ed that all special method lookups on
new-style classes bypass __getattr__ and __getattribute__. Dunder methods had previously worked on modules - you could, for example, use a module as a context manager simply by defining __enter__ and __exit__, before those tricks broke.
Recently some historical...
Using Ajax.BeginForm with ASP.NET MVC 3 Razor
...f using Ajax.BeginForm within Asp.net MVC 3 where unobtrusive validation and Ajax exist?
8 Answers
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What is the difference between memmove and memcpy?
What is the difference between memmove and memcpy ? Which one do you usually use and how?
9 Answers
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How to make an HTTP request + basic auth in Swift
I have a RESTFull service with basic authentication and I want to invoke it from iOS+swift. How and where I must provide Credential for this request?
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