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What should my Objective-C singleton look like? [closed]
...s is not used.) The runtime sends the initialize message to classes in a thread-safe manner. Superclasses receive this message before their subclasses.
So you could do something akin to this:
static MySingleton *sharedSingleton;
+ (void)initialize
{
static BOOL initialized = NO;
if(!init...
Pandas every nth row
...the other solution as you can simply add an index?
– Readler
May 31 '19 at 8:38
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ASP.NET MVC - Set custom IIdentity or IPrincipal
...ookie);
return RedirectToAction("Index", "Home");
}
Global.asax.cs - Reading cookie and replacing HttpContext.User object, this is done by overriding PostAuthenticateRequest
protected void Application_PostAuthenticateRequest(Object sender, EventArgs e)
{
HttpCookie authCookie = Request.Co...
PostgreSQL naming conventions
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@user1334007 The convention is not ugly - and read Craig's comment above. And there's no need to quote if you didn't quote when you created the tables (that is, if you are consistent).
– leonbloy
Jan 30 '16 at 1:41
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What's the difference between INNER JOIN, LEFT JOIN, RIGHT JOIN and FULL JOIN? [duplicate]
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Reading this original article on The Code Project will help you a lot: Visual Representation of SQL Joins.
Also check this post: SQL SERVER – Better Performance – LEFT JOIN or NOT IN?.
Find original one at: Difference...
Best practice for instantiating a new Android Fragment
...n and initialization. If you're new to Android and have stumbled on this thread, please read the answer above over and over and over again.
– rmirabelle
Aug 2 '13 at 15:20
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What's the meaning of Base SDK, iOS deployment target, Target, and Project in xcode
...ession Architecting Modern Apps, Part 2, they explain this clearly
Good read Hi! I'm #available!
So, a modern App might use iOS 9 as the Target SDK, and iOS 7 as the deployment target. This means that you can run on iOS 7, iOS 8 and iOS 9, and that you have available to you any iOS 9 calls wh...
NSRange to Range
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Not the best answer. Easiest to read code but @martin-r has the correct answer.
– Rog
Jul 29 '15 at 12:20
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SQL Server : Columns to Rows
...d how to grant rights to a user so that they can execute it without having read access to the underlying table. To me that's scope creep, because most people writing queries against a table have read access to the table.
– Aaron Bertrand
Aug 2 '13 at 21:56
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What are the differences between struct and class in C++?
This question was already asked in the context of C#/.Net .
30 Answers
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