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Get the current displaying UIViewController on the screen in AppDelegate.m
...er on iPhone):
extension UIApplication {
class func topViewController(base: UIViewController? = UIApplication.sharedApplication().keyWindow?.rootViewController) -> UIViewController? {
if let nav = base as? UINavigationController {
return topViewController(base: nav.visib...
How do I cast a variable in Scala?
...already patternmatched but lost reference to the casted value: <code>base match { case MyConcrete(value) => base.asInstanceOf[MyConcrete].something(value) } </code>, is there a way to get 'base' casted to MyConcrete even if want to extract "value" by exploiting the 'unapply' call perf...
Fully custom validation error message with Rails
...(especially in non-english languages)? Do I really need to use errors.add :base, msg? I'd like to know which column the error is about, so I can display it at the correct form field.
– panzi
Feb 27 '13 at 18:34
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Why do we not have a virtual constructor in C++?
... representing the class around instead of making your own), C++ is a class based language, and does not have objects representing any of the language's constructs. The class does not exist as an object at runtime, so you can't call a virtual method on it.
This fits with the 'you don't pay for what ...
Is there a git-merge --dry-run option?
...ote to your repository. For example:
git fetch origin master
Run git merge-base: git merge-base FETCH_HEAD master
Run git merge-tree: git merge-tree mergebase master FETCH_HEAD (mergebase is the hexadecimal id that merge-base printed in the previous step)
Now suppose that you want to merge the rem...
How to find the kth smallest element in the union of two sorted arrays?
...tion: The inputs are correct, i.e., k is in the range [0, len(a)+len(b)].
Base cases:
If length of one of the arrays is 0, the answer is kth element of the second array.
Reduction steps:
If mid index of a + mid index of b is less than k:
If mid element of a is greater than mid element of ...
Where and why do I have to put the “template” and “typename” keywords?
...the keywords are forbidden, as detailed below
On the name of a dependent base class you are not allowed to write typename. It's assumed that the name given is a class type name. This is true for both names in the base-class list and the constructor initializer list:
template <typename T>
...
Removing the fragment identifier from AngularJS urls (# symbol)
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I needed to put <base href="/" /> in my index.html <head> section.
– nyxz
Dec 18 '15 at 13:51
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Can I call an overloaded constructor from another constructor of the same class in C#?
...
is it possible to class foo : fooBase{ public foo(string a) : this foo(a,null) : base(a) {} foo(string a, string b){}} ?
– Arnis Lapsa
Jun 12 '09 at 7:40
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How to hide iOS status bar
...
You should add this value to plist: "View controller-based status bar appearance" and set it to "NO".
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