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C# generic type constraint for everything nullable
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If you are willing to make a runtime check in Foo's constructor rather than having a compile-time check, you can check if the type is not a reference or nullable type, and throw an exception if that's the case.
I realise that only having a runtime check may be unacceptable, but just i...
In what order do static/instance initializer blocks in Java run?
...ns several classes, each of which has a static initializer block. In what order do those blocks run? I know that within a class, such blocks are run in the order they appear in the code. I've read that it's the same across classes, but some sample code I wrote disagrees with that. I used this co...
I need to store postal codes in a database. How big should the column be?
I expect the column to be a VARCHAR2, in my Oracle Database.
8 Answers
8
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Dynamically change color to lighter or darker by percentage CSS (Javascript)
...plication on the site and we have a few links which are, let's say blue color like the blue links on this site. Now I want to make some other links, but with lighter color. Obviously I can just do simply by the hex code adding in the CSS file, but our site lets user decide what colors they want for ...
How to debug a Flask app
How are you meant to debug errors in Flask? Print to the console? Flash messages to the page? Or is there a more powerful option available to figure out what's happening when something goes wrong?
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How to initialize all members of an array to the same value?
...lue is 0 (in which case you can omit some part of the initializer
and the corresponding elements will be initialized to 0), there's no easy way.
Don't overlook the obvious solution, though:
int myArray[10] = { 5, 5, 5, 5, 5, 5, 5, 5, 5, 5 };
Elements with missing values will be initialized to 0:...
How to prevent scrollbar from repositioning web page?
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overflow-y:scroll is correct, but you should use it with the html tag, not body or else you get a double scrollbar in IE 7
So the correct css would be:
html {
overflow-y: scroll;
}
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Java: recommended solution for deep cloning/copying an instance
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For deep cloning (clones the entire object hierarchy):
commons-lang SerializationUtils - using serialization - if all classes are in your control and you can force implementing Serializable.
Java Deep Cloning Library - using...
Is the “struct hack” technically undefined behavior?
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As the C FAQ says:
It's not clear if it's legal or portable, but it is rather popular.
and:
... an official interpretation has deemed that it is not strictly conforming with the C Standard, although it does seem to work under all known implementations. (Compilers whi...
How to detect IE11?
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IE11 no longer reports as MSIE, according to this list of changes it's intentional to avoid mis-detection.
What you can do if you really want to know it's IE is to detect the Trident/ string in the user agent if navigator.appName returns Nets...