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How to center the content inside a linear layout?

I'm trying to center an ImageView inside a LinearLayout horizontally and vertically, but I just can't do it. The main reason why I'm not using a RelativeLayout for that is because I need the layout_weight (my Activity consists of four columns that should be equally divided, and also respon...
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Is there any way to use a numeric type as an object key?

...in an object, it always gets converted to a string. Is there anyway to actually get it to store as a numeric? The normal typecasting does not seem to work. ...
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How do I get an HttpContext object from HttpContextBase in ASP.NET MVC 1?

... Smyrnow who noted this in the comments) Original answer: You can, especially if the HttpContextBase instance you've been handed is of type HttpContextWrapper at run-time. The following example illustrates how you can do this. It supposes you have a method called Foo that accepts context as HttpCo...
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How to create json by JavaScript for loop?

...x (like what you would have in an actual .json file), I know that syntactically this is different. So, would you refer to just the array of objects as JSON, as well? – VoidKing Oct 15 '13 at 21:27 ...
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Convert List to List

...iterate over the list and cast the elements. This can be done using ConvertAll: List<A> listOfA = new List<C>().ConvertAll(x => (A)x); You could also use Linq: List<A> listOfA = new List<C>().Cast<A>().ToList(); ...
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How to retrieve a module's path?

... import a_module print(a_module.__file__) Will actually give you the path to the .pyc file that was loaded, at least on Mac OS X. So I guess you can do: import os path = os.path.abspath(a_module.__file__) You can also try: path = os.path.dirname(a_module.__file__) To ge...
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Can I get a patch-compatible output from git-diff?

... -p option): git diff --no-prefix [<other git-diff arguments>] Usually though, it is easier to use straight git diff and then use the output to feed to git apply. Most of the time I try to avoid using textual patches. Usually one or more of temporary commits combined with rebase, git stash...
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How to specify the default error page in web.xml?

... 2.5, there's no other way than specifying every common HTTP error individually. You need to figure which HTTP errors the enduser could possibly face. On a barebones webapp with for example the usage of HTTP authentication, having a disabled directory listing, using custom servlets and code which ca...
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Location of parenthesis for auto-executing anonymous JavaScript functions?

... They're virtually the same. The first wraps parentheses around a function to make it a valid expression and invokes it. The result of the expression is undefined. The second executes the function and the parentheses around the automati...
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How to add Action Bar from support library into PreferenceActivity?

...ected void onCreate(Bundle savedInstanceState) { getDelegate().installViewFactory(); getDelegate().onCreate(savedInstanceState); super.onCreate(savedInstanceState); } @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(sa...