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Why does Apple recommend to use dispatch_once for implementing the singleton pattern under ARC?
...he same exact time. It won't allow two instances to be created. The entire idea of dispatch_once() is "perform something once and only once", which is precisely what we're doing.
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Java8: Why is it forbidden to define a default method for a method from java.lang.Object
...s yet another of those language design issues that seems "obviously a good idea" until you start digging and you realize that its actually a bad idea.
This mail has a lot on the subject (and on other subjects too.) There were several design forces that converged to bring us to the current desig...
WebView link click open default browser
...is clicked within the app it opens the default browser. If anyone has some ideas please let me know!
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Why is it bad practice to call System.gc()?
...alizers, or to break WeakReferences or SoftReferences. It is a really bad idea to do this ... but this is what I'm talking about. See also Steven Schlansker's answer.
– Stephen C
Apr 27 '14 at 8:15
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What's the common practice for enums in Python? [duplicate]
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I have no idea why Enums are not support natively by Python.
The best way I've found to emulate them is by overridding _ str _ and _ eq _ so you can compare them and when you use print() you get the string instead of the numerical valu...
Architecture for merging multiple user accounts together
...t. The design I worked out is rather simple, but it works well.
The core idea is that models for a local site identity and the third-party site identities are kept isolated, but are later linked. So every user that logs into the site has a local identity which maps to any number of third-party si...
Why is “final” not allowed in Java 8 interface methods?
... of the fact that interface methods can be multiply inherited.)
The basic idea of a default method is: it is an interface method with a default implementation, and a derived class can provide a more specific implementation. And because the design center was interface evolution, it was a critical d...
Are Exceptions in C++ really slow
...ptions (Itanium ABI, VC++ 64 bits) is the Zero-Cost model exceptions.
The idea is that instead of losing time by setting up a guard and explicitly checking for the presence of exceptions everywhere, the compiler generates a side table that maps any point that may throw an exception (Program Counter...
string.split - by multiple character delimiter
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Not a good idea. Consider: string input = "abc][rf-d][5". The "-" in "rf-d" will be caught as a delimiter. See the accepted answer above instead.
– Gilad Barner
Jan 6 '16 at 23:31
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Should I mix AngularJS with a PHP framework? [closed]
...individual element and populate/change the templates. Just not keen on the idea of PHP generating a wall of javascript like that just yet, and easily viewable
– Shawn Rebelo
Jan 28 '15 at 17:05
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