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Defining an abstract class without any abstract methods
Can I define an abstract class without adding an abstract method?
12 Answers
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How can I check if multiplying two numbers in Java will cause an overflow?
...plyExact, Math.addExact etc. for ints and long. These throw an unchecked ArithmeticException on overflow.
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What is the best way to test for an empty string in Go?
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Both styles are used within the Go's standard libraries.
if len(s) > 0 { ... }
can be found in the strconv package: http://golang.org/src/pkg/strconv/atoi.go
if s != "" { ... }
can be found in the encoding/json package: http://golang.org/...
Dynamically Changing log4j log level
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The changes are permanent through the life cyle of the Logger. On reinitialization the configuration will be read and used as setting the level at runtime does not persist the level change.
UPDATE: If you are using Log4j 2 you should remove the calls to setLevel per the documentation as this c...
What Are the Differences Between PSR-0 and PSR-4?
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They are very similar so it is not surprising that it's a bit confusing. The summary is that PSR-0 had some backwards compatibility features for PEAR-style classnames that PSR-4 dropped, as such it only supports namespaced code. On top of that PSR-4 ...
Maintain aspect ratio of div but fill screen width and height in CSS?
I have a site to put together that has a fixed aspect ratio of approximately 16:9 landscape, like a video.
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git stash -> merge stashed change with current changes
...changes to said branch. What I want is a way to merge my stashed changes with the current changes.
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How to increment a NSNumber
...usts's one-line answers better. They're more concise, and don't require additional variables.
In order to increment an NSNumber, you're going to have to get its value, increment that, and store it in a new NSNumber.
For instance, for an NSNumber holding an integer:
NSNumber *number = [NSNumber ...
Safest way to convert float to integer in python?
...take a floating point number and return the nearest integer below or above it. However these functions return the answer as a floating point number. For example:
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How do I properly clean up Excel interop objects?
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Excel does not quit because your application is still holding references to COM objects.
I guess you're invoking at least one member of a COM object without assigning it to a variable.
For me it was the excelApp.Worksheets object which I di...