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How to detect if app is being built for device or simulator in Swift
...or)
// your simulator code
#else
// your real device code
#endif
For more clarification, you can check Swift proposal SE-0190
For older version -
Clearly, this is false on a device, but it returns true for the iOS Simulator, as specified in the documentation:
The arch(i386) build ...
Regular expression to match a line that doesn't contain a word
... will do that only once, so it is wrapped in a group, and repeated zero or more times: ((?!hede).)*. Finally, the start- and end-of-input are anchored to make sure the entire input is consumed: ^((?!hede).)*$
As you can see, the input "ABhedeCD" will fail because on e3, the regex (?!hede) fails (th...
JOIN queries vs multiple queries
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if you are joining 3 or more tables on different keys, often databases (i.e. mysql) can only use one index per table, meaning maybe one of the joins will be fast (and use an index) whereas the others will be extremely slow. For multiple queries, you...
OOP vs Functional Programming vs Procedural [closed]
...f functions.
In a functional style, data and functions tend toward having more in common with each other (as in Lisp and Scheme) while offering more flexibility in terms of how functions are actually used. Algorithms tend also to be defined in terms of recursion and composition rather than loops an...
How different is Objective-C from C++? [closed]
...pdated to address the points raised in the following comments, added a few more items to the list.
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How do you create a random string that's suitable for a session ID in PostgreSQL?
...either end of the chars array - 0 and z - half as often as the rest. For a more even distribution of characters, I replaced chars[1+random()*(array_length(chars, 1)-1)] with chars[ceil(61 * random())]
– PreciousBodilyFluids
Mar 15 '13 at 4:08
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Sound effects in JavaScript / HTML5
...e browser supports Ogg Vorbis.
If you're writing a game or a music app (more than just a player), you'll want to use more advanced Web Audio API, which is now supported by most browsers.
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Optimal number of threads per core
...et you the best performance. However that very likely not the case. Adding more threads usually helps, but after some point, they cause some performance degradation.
Not long ago, I was doing performance testing on a 2 quad-core machine running an ASP.NET application on Mono under a pretty decent l...
How do I check if file exists in jQuery or pure JavaScript?
...cated because of its detrimental effects to the end user's experience. For more help xhr.spec.whatwg.org (This warning by browser)
– kupendra
May 28 '15 at 7:15
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Ruby on Rails Server options [closed]
...confuses me. There are WEBrick, Mongrel, Passenger, Apache, Nginx and many more I am sure, and I don't really understand the different roles they play.
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