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Why should I care that Java doesn't have reified generics?
...that C++ templates give you complete type safety, read this: kdgregory.com/index.php?page=java.generics.cpp
– kdgregory
Dec 18 '09 at 14:47
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Java variable number or arguments for a method
...ere is a great explanation of the difference here: programmerinterview.com/index.php/java-questions/…
– Dick Lucas
Aug 3 '14 at 15:25
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Removing viewcontrollers from navigation stack
... all view controller from navigation stack.
[navigationArray removeObjectAtIndex: 2]; // You can pass your index here
self.navigationController.viewControllers = navigationArray;
[navigationArray release];
Hope this will help you.
Edit: Swift Code
guard let navigationController = self.navigatio...
How ViewBag in ASP.NET MVC works
... More, you cannot do ViewBag["Foo"]. You will get exception - Cannot apply indexing with [] to an expression of type 'System.Dynamic.DynamicObject'.
Internal implementation of ViewBag actually stores Foo into ViewData["Foo"] (type of ViewDataDictionary), so those 2 are interchangeable. ViewData["Fo...
How to specify an area name in an action link?
... specify an url to something not in an area, use
Html.ActionLink("home", "Index", new { area = "", controller = "Home" })
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How can I use if/else in a dictionary comprehension?
...that the values in d2 are unique
# Python 2
dout2 = {d2.keys()[d2.values().index(v1)] if v1 in d2.values() else k1: v1 for k1, v1 in d1.items()}
# Python 3
dout2 = {list(d2.keys())[list(d2.values()).index(v1)] if v1 in d2.values() else k1: v1 for k1, v1 in d1.items()}
which gives
{'bad_key2': {'...
How to use performSelector:withObject:afterDelay: with primitive types in Cocoa?
...eOrientationPortrait;
BOOL anim = NO;
[anInvocation setArgument:&val atIndex:2];
[anInvocation setArgument:&anim atIndex:3];
[anInvocation performSelector:@selector(invoke) withObject:nil afterDelay:1];
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Not equal != operator on NULL
... +1 ... not soon enough. Now when can I get "duplicate" NULLs in an index? :(
– user166390
Apr 14 '11 at 5:19
Y...
Storing SHA1 hash values in MySQL
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If you need an index on the sha1 column, I suggest CHAR(40) for performance reasons.
In my case the sha1 column is an email confirmation token, so on the landing page the query enters only with the token.
In this case CHAR(40) with INDEX, i...
mysql Foreign key constraint is incorrectly formed error
...ieve it does not necessarily have to be a primary key, but it MUST have an index. Primary keys automatically get indexed.
– Itai
May 6 '18 at 7:23
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