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What's the best practice for primary keys in tables?
... situations.
On surrogate vs natural key, I refer to the rules above. If the natural key is small and will never change it can be used as a primary key. If the natural key is large or likely to change I use surrogate keys. If there is no primary key I still make a surrogate key because experien...
How can I check if a method is static using reflection?
...un-time ONLY the static Methods of a class, how can I do this?
Or, how to differentiate between static and non-static methods.
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How to handle anchor hash linking in AngularJS
... $rootScope.$on('$routeChangeSuccess', function(newRoute, oldRoute) {
if($location.hash()) $anchorScroll();
});
});
and your link would look like this:
<a href="#/test#foo">Test/Foo</a>
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Overload with different return type in Java?
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I always thought that if we did something like int i = foo() or float f = foo() it would know which one, but if the statement is just the function that it the compiler wouldn't know. I get it know. Thanks.
– nunos
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Check if null Boolean is true results in exception
...s any other object.
In your particular case, your Boolean is null and the if statement triggers an implicit conversion to boolean that produces the NullPointerException. You may need instead:
if(bool != null && bool) { ... }
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How to define a preprocessor symbol in Xcode
...is:
constant_1=VALUE constant_2=VALUE
Note that you don't need the '='s if you just want to #define a symbol, rather than giving it a value (for #ifdef statements)
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Responsive image align center bootstrap 3
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If you're using Bootstrap v3.0.1 or greater, you should use this solution instead. It doesn't override Bootstrap's styles with custom CSS, but instead uses a Bootstrap feature.
My original answer is shown below for posterity...
C++ new int[0] — will it allocate memory?
... pointer returned as a request for zero size is undefined.
Also
Even if the size of the space requested [by new] is zero, the request can fail.
That means you can do it, but you can not legally (in a well defined manner across all platforms) dereference the memory that you get - you can only...
How do I pass a string into subprocess.Popen (using the stdin argument)?
If I do the following:
11 Answers
11
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keep rsync from removing unfinished source files
...is transferring a file before it's complete, not that you're deleting it.
If this is Linux, it's possible for a file to be open by process A and process B can unlink the file. There's no error, but of course A is wasting its time. Therefore, the fact that rsync deletes the source file is not a pr...