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What's the difference between the 'ref' and 'out' keywords?
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The ref modifier means that:
The value is already set and
The method can read and modify it.
The out modifier means that:
The Value isn't set and can't be read by the method until it is set.
The method must set it before returning.
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Bring element to front using CSS
...ng images to front using CSS . I've already tried setting z-index to 1000 and position to relative, but it still fails.
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Can't find the PostgreSQL client library (libpq)
... edited Nov 23 '12 at 5:38
Marc-André Lafortune
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answered Sep 21 '11 at 9:44
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instanceof Vs getClass( )
I see gain in performance when using getClass() and == operator over instanceOf operator.
4 Answers
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PHP and Enumerations
...o give predefined values which IDEs' auto-completion features could understand.
37 Answers
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How can I make the Android emulator show the soft keyboard?
...rd display not displaying when it should. However, I don't have a device handy for testing. The problem is that the emulator never shows the soft keyboard .
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CursorLoader usage without ContentProvider
Android SDK documentation says that startManagingCursor() method is depracated:
5 Answers
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The requested operation cannot be performed on a file with a user-mapped section open
...th Unlocker, even when it was saying that there was no lock over the file, and I couldn't delete the folder until I didn't delete that single file...
After that it compiled.
EDIT:
I found out why in my case this was happening. I had the DLL opened in a text editor inside Visual Studio...
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parseInt vs unary plus, when to use which?
...ore like parseFloat since it also accepts decimals.
parseInt on the other hand stops parsing when it sees a non-numerical character, like the period that is intended to be a decimal point ..
+'2.3' === 2.3; //true
parseInt('2.3',10) === 2; //true
parseInt and parseFloat parses and bu...
How to change a nullable column to not nullable in a Rails migration?
I created a date column in a previous migration and set it to be nullable. Now I want to change it to be not nullable. How do I go about doing this assuming there are null rows in that database? I'm ok with setting those columns to Time.now if they're currently null.
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