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Optional Methods in Java Interface
... different variants of collections (eg: readable, writable, random-access, etc.) he'd only have very coarse set of interfaces, primarily
Collection, List, Set and Map, and then document certain operations as "optional". This was to avoid the combinatorial explosion that would result from fine-grain...
Use 'import module' or 'from module import'?
...module
and then access everything as
module.function
module.modulevar
etc. The reason is that at the same time you have short invocation, and you clearly define the module namespace of each routine, something that is very useful if you have to search for usage of a given module in your source.
...
Principal component analysis in Python
... def pc( self ):
""" e.g. 1000 x 2 U[:, :npc] * d[:npc], to plot etc. """
n = self.npc
return self.U[:, :n] * self.d[:n]
# These 1-line methods may not be worth the bother;
# then use U d Vt directly --
def vars_pc( self, x ):
n = self.npc
retu...
How do I expand the output display to see more columns of a pandas DataFrame?
... In order to set no limits, None can be used (instead of 999, etc.).
– Eric O Lebigot
Sep 14 '17 at 19:27
5
...
When should the volatile keyword be used in C#?
... always access the current value of the field (it might be from the stack, etc). Marking a field as volatile ensures that the current value of the field is accessed by the instruction. This is useful when the value can be modified (in a non-locking scenario) by a concurrent thread in your program or...
What is the difference between Modal and Push segue in Storyboards?
...er, you will lose all the features like navigation bar, animation, gesture etc when you do so. In this case, you should embed your parent view controller inside navigation view controller first and then make push segue to child view controllers.
2. Modal Segue
A modal segue (i.e. present modally...
Difference between SelectedItem, SelectedValue and SelectedValuePath
...our view is bound to (with properties for things like ProductName, Weight, etc). Let's also say you have a CategoryID property on that Product object, and you want the user to be able to select a category for the product from a list of categories. You need the ID property of the Category object to...
Must Dependency Injection come at the expense of Encapsulation?
...o inject code to the normal method evaluation, adding strange side-effects etc.
Friend declaration in C++ does.
Class extention in Ruby does. Just redefine a string method somewhere after a string class was fully defined.
Well, a lot of stuff does.
Encapsulation is a good and important principle...
Can I change the viewport meta tag in mobile safari on the fly?
... devices. For example, you can detect if the device supports touch events, etc. (i.e., with modernizr). Depends on what you're trying to do.
– markquezada
Jul 16 '15 at 0:19
...
Getting RAW Soap Data from a Web Reference Client running in ASP.net
...
{
private static readonly ILog log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
private Stream oldStream;
private Stream newStream;
public override object GetInitializer(LogicalMethodInfo methodInfo, SoapExtensionAttribute attribute)
{
return nul...