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Detecting when the 'back' button is pressed on a navbar
...lution any more. Worked at the time I first used this (it was iOS 10). But now I accidentally found it calmly stopped working (iOS 11). Had to switch to the "willMove(toParentViewController)" solution.
– Vitalii
Jan 24 '18 at 14:27
...
Why does int i = 1024 * 1024 * 1024 * 1024 compile without error?
...A VALUE(although 2147483648L is) in Java. The compiler literally does not know what it is, or how to use it. So it whines.
1024 is a valid int in Java, and a valid int multiplied by another valid int, is always a valid int. Even if it's not the same value that you would intuitively expect because t...
Calling constructors in c++ without new
...
Both lines are in fact correct but do subtly different things.
The first line creates a new object on the stack by calling a constructor of the format Thing(const char*).
The second one is a bit more complex. It essentially does the following
Create an object of...
Python list subtraction operation
...
Use a list comprehension:
[item for item in x if item not in y]
If you want to use the - infix syntax, you can just do:
class MyList(list):
def __init__(self, *args):
super(MyList, self).__init__(args)
def __sub__(self, other):
return self.__c...
Principal component analysis in Python
...o 90 %, 95 % ...
p.npc: number of principal components,
e.g. 2 if the top 2 eigenvalues are >= `fraction` of the total.
It's ok to change this; methods use the current value.
Methods:
The methods of class PCA transform vectors or arrays of e.g.
20 variables, 2 princip...
Split a string by another string in C#
...e it suddenly drags my attention from stream level to byte level. Anybody know why C# library guys designed the Split method like this? If there is a good reason, I can probably try to appreciate it despite the inconvenience.
– foresightyj
Jan 23 '15 at 5:24
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How do I test an AngularJS service with Jasmine?
...).toEqual(1);
}
//we only need the following line if the name of the
//parameter in myTestFunction is not 'myService' or if
//the code is going to be minify.
myTestFunction.$inject = [ 'myService' ];
var myInjector = angular....
Correct use of Multimapping in Dapper
...item.Customer.CustomerId.IsEqualTo(1);
The splitOn param needs to be specified as the split point, it defaults to Id. If there are multiple split points, you will need to add them in a comma delimited list.
Say your recordset looks like this:
ProductID | ProductName | AccountOpened | CustomerI...
`Apache` `localhost/~username/` not working
...
Thanks, it solved mine too, I'd be glad to know why it didn't work with Require local and the + signs!
– Sassan
Oct 5 '15 at 2:12
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How do I convert a double into a string in C++?
I need to store a double as a string. I know I can use printf if I wanted to display it, but I just want to store it in a string variable so that I can store it in a map later (as the value , not the key ).
...