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Set initial focus in an Android application

In my Android application it automatically focuses the first Button I have in my layout, giving it an orange outline. How can I set the initial focus preferably in XML, and can this be set to nothing? ...
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What is the best django model field to use to represent a US dollar amount?

... I think this example is correct almost to all currencies. To represent currencies as Bitcoin, I think is much better to use an integer field to save the amount in satoshis, and then show it to the final user in the representation that you want (BTC, mBTC, etc) ...
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Why am I getting an Exception with the message “Invalid setup on a non-virtual (overridable in VB) m

...ethods and sealed classes. While running a test using mock object, MOQ actually creates an in-memory proxy type which inherits from your "XmlCupboardAccess" and overrides the behaviors that you have set up in the "SetUp" method. And as you know in C#, you can override something only if it is marked ...
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Could not load file or assembly or one of its dependencies

...ncing an old version of unity. For example let's say you have an assembly called ServiceLocator.dll which needs an old version of Unity assembly, now when you reference the ServiceLocator you should provide it with the old version of Unity, and that makes the problem. May be the output folder where ...
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Play audio file from the assets directory

...e file in the assets directory. The asset directory contents are not actually 'real files' on disk. All of them are put together one after another. So, if you do not specify where to start and how many bytes to read, the player will read up to the end (that is, will keep playing all the file...
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How do you clear a stringstream variable?

... For all the standard library types the member function empty() is a query, not a command, i.e. it means "are you empty?" not "please throw away your contents". The clear() member function is inherited from ios and is used to cle...
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Find integer index of rows with NaN in pandas dataframe

... And just in case, if you want to find the coordinates of 'nan' for all the columns instead (supposing they are all numericals), here you go: df = pd.DataFrame([[0,1,3,4,np.nan,2],[3,5,6,np.nan,3,3]]) df 0 1 2 3 4 5 0 0 1 3 4.0 NaN 2 1 3 5 6 NaN 3.0 3 np.where(np.as...
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How to remove unwanted space between rows and columns in table?

...onym, address, big, cite, code, del, dfn, em, img, ins, kbd, q, s, samp, small, strike, strong, sub, sup, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas, details, embed, figure, figcaption, foo...
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Shortcut to exit scale mode in VirtualBox [closed]

...tings, as the Menu bar is hidden in Scale View. Had the same issue, especially when you checked the box not to show the 'Switch to Scale view' dialog. This you can do while the VM is running. share | ...
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How to fix 'sudo: no tty present and no askpass program specified' error?

...type: sudo visudo Then edit that file to add to the very end: username ALL = NOPASSWD: /fullpath/to/command, /fullpath/to/othercommand eg john ALL = NOPASSWD: /sbin/poweroff, /sbin/start, /sbin/stop will allow user john to sudo poweroff, start and stop without being prompted for password. ...