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Does Java casting introduce overhead? Why?
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There are 2 types of casting:
Implicit casting, when you cast from a type to a wider type, which is done automatically and there is no overhead:
String s = "Cast";
Object o = s; // implicit casting
Explicit casting, when you go from a wider type to a more narrow one. For this case, y...
“f” after number
What does the f after the numbers indicate? Is this from C or Objective-C? Is there any difference in not adding this to a constant number?
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Draw line in UIView
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The "if let context" fails when called from viewDidLayoutSubviews.
– Oscar
Mar 1 at 7:11
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Unable to find a locale path to store translations for file __init__.py
...e a locale folder first using mkdir locale. If you are running the command from within an app folder, you need a locale folder within that app folder.
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What is the difference between Modal and Push segue in Storyboards?
...eep stack. As long as you are taking care of objects you might be passing from one VC to another, the runtime will take care of the navigation stack. See the image for a visual indication:
A modal Segue is just one VC presenting another VC modally. The VCs don't have to be part of a navigation ...
A CORS POST request works from plain JavaScript, but why not with jQuery?
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Yes! thanks Will. I thought you could control everything from the client side, but it sounds like you need control of both ends.
– Elisabeth
Jul 9 '11 at 0:34
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Changing the current working directory in Java?
How can I change the current working directory from within a Java program? Everything I've been able to find about the issue claims that you simply can't do it, but I can't believe that that's really the case.
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What does the unary plus operator do?
...r than the operator itself. For example, it can be used to force widening from smaller integral types to int, or ensure that an expression's result is treated as an rvalue and therefore not compatible with a non-const reference parameter. I submit, however, that these uses are better suited to cod...
Set Django IntegerField by choices=… name
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FWIW, if you need set it from a literal string (perhaps from a form, user input, or similar) you can then just do: thing.priority = getattr(thing, strvalue.upper()).
– mrooney
Feb 24 '13 at 23:22
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How to export and import environment variables in windows?
...t variables sync on different machines. I just want to export the settings from one computer and import to other ones.
7 A...