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'App not Installed' Error on Android

...earing all of my cached data. Then, finally I realized all I had to do was select both signature versions when building my signed apk. Before I only had V2 (Full APK Signature) selected, but after selecting V1 Jar Signature as well, I was able to successfully install my signed APK on my 4.4.2 devic...
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Check if OneToOneField is None in Django

...fortunately, this doesn't work all the time. In case you want to work with select_related() now or in the future -- or maybe even to be sure you also handle other sorts of magic which may happen elsewhere -- you have to extend the test as follows: if hasattr(object, 'onetoonerevrelattr') and object....
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Error message “Forbidden You don't have permission to access / on this server” [closed]

...; OPT_INDEXES) { return index_directory(r, d); } else { const char *index_names = apr_table_get(r->notes, "dir-index-names"); ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01276) "Cannot serve directory %s: No matching DirectoryIndex (%s) found, an...
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How to copy from current position to the end of line in vi

...opy/paste between different instances, you can use the system clipboard by selecting the * register, so the commands become "*y$ for copying and "*p for pasting. $ move-to-linebreak $ y$ yank-to-linebreak y,$ "*y$ select clipboard-register yank-to-linebreak ",*,y,$ "*p select clipboard-regist...
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Possible to do a MySQL foreign key to one of two possible tables?

...ecific type of filter is easy if you know which type you want to join to: SELECT * FROM Products INNER JOIN FiltersType2 USING (product_id) If you want the filter type to be dynamic, you must write application code to construct the SQL query. SQL requires that the table be specified and fixed at ...
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How to easily initialize a list of Tuples?

..." }, new Hold { Id = 2, Name = "You" } }; var anonymousProjections = holds.Select(x => new { SomeNewId = x.Id, SomeNewName = x.Name }); var namedTuples = holds.Select(x => (TupleId: x.Id, TupleName: x.Name)); Reuse the tuples later with grouping methods or use a method to construct the...
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How to get the raw value an field?

... Spudly has a useful answer that he deleted: Just use the CSS :invalid selector for this. input[type=number]:invalid { background-color: #FFCCCC; } This will trigger your element to turn red whenever a non-numeric valid is entered. Browser support for <input type='number'&gt...
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How can I set the PHP version in PHPStorm?

...ndows: File -> Settings -> Languages & Frameworks > PHP then select your PHP version, for example, 7.0 This is very useful when your local system runs PHP 7.0, for example, but production is running PHP 5.5. That way PhpStorm will warn you which parts will not work in production, show ...
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List of ANSI color escape sequences

... The ANSI escape sequences you're looking for are the Select Graphic Rendition subset. All of these have the form \033[XXXm where XXX is a series of semicolon-separated parameters. To say, make text red, bold, and underlined (we'll discuss many other options below) in C you mig...
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Folder is locked and I can't unlock it

... Right click on your Subversion working directory folder, and select TortoiseSVN->Clean Up from the Context Menu. This will recurse it's way through your working directory and cleanup any incomplete actions, remove the local locks (which is different from using Subversion locking of ...