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Can you find all classes in a package using reflection?

...le. Class loaders are not required to tell the VM which classes it can provide, instead they are just handed requests for classes, and have to return a class or throw an exception. However, if you write your own class loaders, or examine the classpaths and it's jars, it's possible to find this info...
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How is the “greater than” or “>” character used in CSS?

I have seen this character a number of times in CSS files but I have no idea how its used. Can anyone explain it to me and show how they are useful in making a page style easier? ...
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os.path.dirname(__file__) returns empty

...ithout taking into account the current directory. If you want to also consider the current directory, you have to do so explicitly. To get the dirname of the absolute path, use os.path.dirname(os.path.abspath(__file__)) ...
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Using 'return' in a Ruby block

... Where is thing invoked? Are you inside a class? You may consider using something like this: class MyThing def ret b @retval = b end def thing(*args, &block) implicit = block.call value = @retval || implicit puts "value=#{value}" ...
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Sass and combined child selector

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Difference between CMAKE_CURRENT_SOURCE_DIR and CMAKE_CURRENT_LIST_DIR

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Get “Value” property in IGrouping

... Just a related tip - since, as the other answers have said, the grouping is an IEnumerable, if you need to access a specific index you can use group.ElementAt(i). This is probably obvious to a lot of people but hopefully it will help a few! ...
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Git : List all unmerged changes in git

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getApplicationContext(), getBaseContext(), getApplication(), getParent()

...ion() is available to Activity and Services only. Although in current Android Activity and Service implementations, getApplication() and getApplicationContext() return the same object, there is no guarantee that this will always be the case (for example, in a specific vendor implementation). So if y...
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In Python, how to display current time in readable format

... Take a look at the facilities provided by http://docs.python.org/library/time.html You have several conversion functions there. Edit: see datetime (http://docs.python.org/library/datetime.html#module-datetime) also for more OOP-like solutions. The time libr...