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Should IBOutlets be strong or weak under ARC?
...t to a subview or to
a constraint that's not always going to be retained by the view
hierarchy. The only time you really need to make an outlet weak is if
you have a custom view that references something back up the view
hierarchy and in general that's not recommended.
I asked about this o...
gitignore all files of extension in directory
...
It would appear that the ** syntax is supported by git as of version 1.8.2.1 according to the documentation.
Two consecutive asterisks ("**") in patterns matched against full pathname may have special meaning:
A leading "**" followed by a slash means match in a...
MySQL COUNT DISTINCT
...ite
From cp_visits
Where ts >= DATE_SUB(NOW(), INTERVAL 1 DAY)
Group By site_id
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Dependency Inject (DI) “friendly” library
...all the DI Container, it'll call you.
Never directly ask for a dependency by calling a container from within your code. Ask for it implicitly by using Constructor Injection.
Use Constructor Injection
When you need a dependency, ask for it statically through the constructor:
public class Service ...
Difference between java.util.Random and java.security.SecureRandom
...his is a linear congruential pseudorandom number generator, as
defined by D. H. Lehmer and described by Donald E. Knuth in
The Art of Computer Programming, Volume 3:
Seminumerical Algorithms, section 3.2.1.
Predictability of Linear Congruential Generators
Hugo Krawczyk wrote a pretty ...
Which characters make a URL invalid?
...
In general URIs as defined by RFC 3986 (see Section 2: Characters) may contain any of the following 84 characters:
ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~:/?#[]@!$&'()*+,;=
Note that this list doesn't state where in t...
Scala vs. Groovy vs. Clojure [closed]
...think it is a language with limited utility, particularly as Jython and JRuby start making inroads on the JVM-land, compared to the others.
Clojure, even discounting some very interesting features, has a strong appeal just by being a Lisp dialect on JVM. It might limit its popularity, granted, but ...
Getting A File's Mime Type In Java
... file must exist on the file system. This does not work with a stream or a byte array, etc.
– Necreaux
Mar 31 '15 at 18:06
3
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Why does flowing off the end of a non-void function without returning a value not produce a compiler
Ever since I realized many years ago, that this doesn't produce an error by default (in GCC at least), I've always wondered why?
...
What is SaaS, PaaS and IaaS? With examples
...y belong to IaaS service model.
Although Hadoop is based on previous works by Google(GFS and MapReduce), it is not from Google. It is an Apache project. You can find more here. It is just a distributed computing platform and does not fall into any of these service models, IMHO.
Microsoft's Windows A...