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Best practices for Storyboard login screen, handling clearing of data upon logout

I'm building an iOS app using a Storyboard. The root view controller is a Tab Bar Controller. I'm creating the login/logout process, and it's mostly working fine, but I've got a few issues. I need to know the BEST way to set all this up. ...
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Database Structure for Tree Data Structure

... Have a look at Managing Hierarchical Data in MySQL. It discusses two approaches for storing and managing hierarchical (tree-like) data in a relational database. The first approach is the adjacency list model, which is what you essentially describe: having a foreign key...
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In C# check that filename is *possibly* valid (not that it exists) [duplicate]

... I enhanced this solution using bOk = System.IO.Path.IsPathRooted(fileName); instead of bOk = true; – jing Sep 24 '13 at 7:12 ...
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TypeError: 'module' object is not callable

...to follow the standards as I am interpreting them. So, I have at the setup root: setup.py scripts/ script1 mypackage/ bin/ script1.py subpackage1/ subpackage_etc/ If this is not compliant with standard, please let me know. ...
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Why all the Active Record hate? [closed]

...database itself, tables, relations, even some logic if the DBMS allows it (MySQL is also grown-up now) A2) very often, there is more than a data store: file system (blobs in database are not always a good decision...), legacy systems (imagine yourself "how" they will be accessed, many varieties pos...
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Can you use if/else conditions in CSS?

...sers supporting them). With them you could do something along the line: :root { --main-bg-color: brown; } .one { background-color: var(--main-bg-color); } .two { background-color: black; } Finally, you can preprocess your stylesheet with your favourite server-side language. If you're u...
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How to rename a file using Python

...can use the backported version found here Let's assume you are not in the root path (just to add a bit of difficulty to it) you want to rename, and have to provide a full path, we can look at this: some_path = 'a/b/c/the_file.extension' So, you can take your path and create a Path object out of...
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Update all values of a column to lowercase

... See http://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_lower UPDATE table_name SET tag = LOWER(tag) share | improve t...
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How To Accept a File POST

...esponseException(HttpStatusCode.UnsupportedMediaType); } string root = System.Web.HttpContext.Current.Server.MapPath("~/App_Data/uploads"); var provider = new MultipartFormDataStreamProvider(root); var task = request.Content.ReadAsMultipartAsync(provider). ContinueWith...
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Nginx 403 forbidden for all files

...dn't also require x permission on parent directories is if it's running as root. – kolbyjack May 23 '14 at 12:46 I end...