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Weak and strong property setter attributes in Objective-C
...uivalent to retain, however ARC will manage the release for you.
The only time you would want to use weak, is if you wanted to avoid retain cycles (e.g. the parent retains the child and the child retains the parent so neither is ever released).
The 'toll free bridging' part (casting from NS to CF)...
Manually raising (throwing) an exception in Python
...thon 3, you can chain Exceptions, which preserve tracebacks:
raise RuntimeError('specific message') from error
Be aware:
this does allow changing the error type raised, and
this is not compatible with Python 2.
Deprecated Methods:
These can easily hide and even get into production code. ...
What are the details of “Objective-C Literals” mentioned in the Xcode 4.4 release notes?
...WDC 2012 sessions. I intentionally didn't remove the the filenames and the time of each slide so you can find them for yourself if you feel like. They are essentially the same thing as stated in this post, but there are also a few new things that I'll mention above the images.
Please note that ima...
Why was the arguments.callee.caller property deprecated in JavaScript?
...ents.callee.caller, or more specifically Function.caller.
At any point in time you can find the deepest caller of any function on the stack, and as I said above, looking at the call stack has one single major effect: It makes a large number of optimizations impossible, or much much more difficult.
...
Line-breaking widget layout for Android
...multiple Radio Buttons. I want to check only one Radio Button at the same time. Please help for this.
– Rahul Patidar
Jun 6 '16 at 14:40
...
Is it bad practice to have a constructor function return a Promise?
...and they run either after it resolves or, if it's already resolved, at the time of attaching the callback.
This is how mongoskin works, except it doesn't actually use promises.
Edit: Since I wrote that reply I've fallen in love with ES6/7 syntax so there's another example using that. You can use...
Why '&&' and not '&'?
...by a thousand cuts."
Game developers (and others working in extreme real-time conditions) go as far as restructuring their logic to better suit the predictor. There is also evidence of this in decompiled mscorlib code.
Just because .NET shields you from this type of thing doesn't mean it's not imp...
What does “program to interfaces, not implementations” mean?
...s can be done. This can be used to change the behavior of a program at run-time. It also helps you to write far better programs from the maintenance point of view.
Here's a basic example for you.
public enum Language
{
English, German, Spanish
}
public class SpeakerFactory
{
public static...
Spring MVC: How to perform validation?
I would like to know what is the cleanest and best way to perform form validation of user inputs. I have seen some developers implement org.springframework.validation.Validator . A question about that: I saw it validates a class. Does the class have to be filled manually with the values from the us...
memory_get_peak_usage() with “real usage”
... break;
}
$data .= str_repeat(' ', 1024 * 25); // 1kb every time
}
Output
Stoped at: 95.86%
{
"HIGHEST_MEMORY": "0.71",
"HIGHEST_DIFF": "0.24",
"PERCENTAGE_BREAK": "95.86%",
"AVERAGE": "0.04",
"LOOPS": 11
}
Live Demo
This may still fail
It may fail because...