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Why is Multiple Inheritance not allowed in Java or C#?
...ny books just say, multiple inheritance is not allowed. But it can be implemented by using interfaces. Nothing is discussed about why it is not allowed. Can anybody tell me precisely why it is not allowed?
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TreeMap sort by value
I want to write a comparator that will let me sort a TreeMap by value instead of the default natural ordering.
8 Answers
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How to get mouse position in jQuery without mouse-events?
...jQuery(function($) {
var currentMousePos = { x: -1, y: -1 };
$(document).mousemove(function(event) {
currentMousePos.x = event.pageX;
currentMousePos.y = event.pageY;
});
// ELSEWHERE, your code that needs to know the mouse position without an event
if (currentMo...
iOS: Access app-info.plist variables in code
... the following...
[[NSBundle mainBundle] objectForInfoDictionaryKey:key_name];
For example to get the version number you might do the following
NSString *appVersion = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"CFBundleVersion"];
There is a gotcha in that the version number now has two...
Handler is abstract ,cannot be instantiated
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It certainly was helpful to me - as an iOS developer coming back to occasional projects for Android, Android Studio has some annoying quirks, trying to be TOO clever at importing/autocompleting is one i.e. is quicker 90% of the time, is 5 x slower 10% o...
String.equals versus == [duplicate]
...them in an array of strings, and then compares a variable with the first home ... why isn't it working?
20 Answers
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How to change column datatype from character to numeric in PostgreSQL 8.4
...new column value from the old; if omitted, the default conversion is the same as an assignment cast from old data type to new. A USING clause must be provided if there is no implicit or assignment cast from old to new type.
So this might work (depending on your data):
alter table presales alter c...
Django Rest Framework: Dynamically return subset of fields
As recommended in the blogpost Best Practices for Designing a Pragmatic RESTful API , I would like to add a fields query parameter to a Django Rest Framework based API which enables the user to select only a subset of fields per resource.
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How to remove an element from a list by index
How do I remove an element from a list by index in Python?
18 Answers
18
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How to pass the -D System properties while testing on Eclipse?
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Run -> Run configurations, select project, second tab: “Arguments”. Top box is for your program, bottom box is for VM arguments, e.g. -Dkey=value.
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