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OSGi: What are the differences between Apache Felix and Apache Karaf?
...just the OSGi core runtime. Karaf provides a "distribution" based on Felix by adding other features such as a console, an SSH remoting mechanism, a file deployer and more.
In this diagram of the Karaf architecture, Felix (or other OSGi implementation - currently Equinox is also supported) is the O...
What is the difference between sites-enabled and sites-available directory?
...nce is that virtual sites listed in the sites-enabled directory are served by apache. In the sites-available directory there are the virtual sites that exist on your server but people can't access them because they are not enabled yet.
sites-available: this directory has configuration files for ...
ctypes - Beginner
...the non-python part of the tutorial. Make sure ctypes can find the library by putting it in /usr/lib or another standard directory. If you do this, you don't need to specify the full path when writing the wrapper. If you choose not to do this, you must provide the full path of the library when calli...
Printing without newline (print 'a',) prints a space, how to remove?
...tion, which allows you to set an end parameter. You can use it in >=2.6 by importing from __future__. I'd avoid this in any serious 2.x code though, as it will be a little confusing for those who have never used 3.x. However, it should give you a taste of some of the goodness 3.x brings.
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Programmatically set height on LayoutParams as density-independent pixels
...d-coded to only support a fixed number of densities. If you want to scale by the density scaling factor, just multiply by developer.android.com/reference/android/util/… which would also be the same as doing (size * metrics.densityDpi) / DisplayMetrics.DENSITY_DEFAULT.
– hack...
What is the benefit of using “SET XACT_ABORT ON” in a stored procedure?
...ient application rather than within SQL Server itself (which isn't covered by the default XACT_ABORT OFF setting.)
Since a query timeout will leave the transaction open, SET XACT_ABORT ON is recommended in all stored procedures with explicit transactions (unless you have a specific reason to do oth...
Failed to load resource under Chrome
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I recently ran into this problem and discovered that it was caused by the "Adblock" extension (my best guess is that it's because I had the words "banner" and "ad" in the filename).
As a quick test to see if that's your problem, start Chrome in incognito mode with extensions disabled (ctrl+...
What goes into the “Controller” in “MVC”?
...hin. View Helpers are a perfect place to collect data ready to be consumed by your view. One should not have to dispatch the complete controller stack on to reuse some data-access logic. More detail: rmauger.co.uk/2009/03/…
– Exception e
Nov 24 '09 at 14:56
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What's the difference between IEquatable and just overriding Object.Equals()?
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I see. By chance you have any place where I can get that kind of "deeper" information about .NET? Thanks!
– devoured elysium
Apr 29 '10 at 6:03
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Find all records which have a count of an association greater than zero
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joins uses an inner join by default so using Project.joins(:vacancies) will in effect only return projects that have an associated vacancy.
UPDATE:
As pointed out by @mackskatz in the comment, without a group clause, the code above will return dupl...