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Understanding reference counting with Cocoa and Objective-C
...e count is decremented. If, after calling release, the reference count is now zero, then that object's memory is freed by the system.
The basic way this differs from malloc and free is that any given object doesn't need to worry about other parts of the system crashing because you've freed memory ...
C# 'is' operator performance
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I'm with Ian, you probably don't want to do this.
However, just so you know, there is very little difference between the two, over 10,000,000 iterations
The enum check comes in at 700
milliseconds (approx)
The IS check comes in at 1000
milliseconds (approx)
I personally wouldn't fix this pro...
Will Try / Finally (without the Catch) bubble the exception?
....
Third, if DoSomethingToTheResource throws an exception, then how do we know that EnableAccessToTheResource will not also throw an exception? Whatever awfulness befell the use of the resource might also affect the cleanup code, in which case the original exception will be lost and the problem will...
Why should I declare a virtual destructor for an abstract class in C++?
I know it is a good practice to declare virtual destructors for base classes in C++, but is it always important to declare virtual destructors even for abstract classes that function as interfaces? Please provide some reasons and examples why.
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Changing ImageView source
...ble.monkey));
*** With new android API 22 getResources().getDrawable() is now deprecated. This is an example how to use now:
myImgView.setImageDrawable(getResources().getDrawable(R.drawable.monkey, getApplicationContext().getTheme()));
and how to validate for old API versions:
if (Build.VERSION.SD...
How to reuse existing C# class definitions in TypeScript projects
... thinking to do manually.. good. Not sure I have time to write a converter now.. but yes, that would be the idea. Thanks. May be Microsoft is just doing it right now whie we speak.
– pabloelustondo
Oct 19 '12 at 1:57
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PadLeft function in T-SQL
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SQL Server now supports the FORMAT function starting from version 2012, so:
SELECT FORMAT(id, '0000') FROM TableA
will do the trick.
If your id or column is in a varchar and represents a number you convert first:
SELECT FORMAT(CON...
List of Delphi language features and version in which they were introduced/deprecated
... bit AnsiChar/AnsiString support in enable on Linux.
C++Builder and Delphi now use the same ABI for all calls.
Delphi 10.2 Tokyo
Support for Linux server apps (Intel 64-bit using LLVM and ARC).
Assigning a dynamic arrays to a pointer using the @ operator is only allowed when hard-casting the a...
The Role Manager feature has not been enabled
... After adding above to web.config roleManager is enabled. But now I am getting exception Unable to connect to SQL Server database
– Irfan Yusanif
Jan 4 '16 at 13:51
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How to convert local time string to UTC?
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NOTE -- As of 2020 you should not be using .utcnow() or .utcfromtimestamp(xxx). As you've presumably moved on to python3,you should be using timezone aware datetime objects.
>>> from datetime import timezone
>>> dt_now = datetime.now(tz=timezone.utc)
&g...