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How to prove that a problem is NP complete?
...covers (that is, for some graph G, does it have a vertex cover set of size k such that every edge in G has at least one vertex in the cover set?) is in NP:
our input X is some graph G and some number k (this is from the problem definition)
Take our information C to be "any possible subset of verti...
Best general SVN Ignore Pattern?
..., C#/VB.NET, and PERL projects on both Windows and Linux platforms. It works well for me!
Formatted for copy and paste:
*.o *.lo *.la #*# .*.rej *.rej .*~ *~ .#* .DS_Store thumbs.db Thumbs.db *.bak *.class *.exe *.dll *.mine *.obj *.ncb *.lib *.log *.idb *.pdb *.ilk *.msi* .res *.pch *.suo *.e...
Getting attributes of a class
...ss' objects>,
'__doc__': None,
'__module__': '__main__',
'__weakref__': <attribute '__weakref__' of 'MyClass' objects>,
'a': '34',
'b': '12',
'myfunc': <function __main__.myfunc>}>),
('__doc__', None),
('__module__', '__main__'),
('__weakref__', <attribute '...
Select DISTINCT individual columns in django?
...egory').distinct()
print q.query # See for yourself.
# The query would look something like
# SELECT DISTINCT "app_productorder"."category" FROM "app_productorder"
There are a couple of things to remember here. First, this will return a ValuesQuerySet which behaves differently from a QuerySet. Whe...
Format timedelta to string
...
Martijn Pieters♦
839k212212 gold badges32183218 silver badges28092809 bronze badges
answered Feb 11 '09 at 20:52
ParandPa...
How to get a string after a specific substring?
...on world , i'm a beginner "
print my_string.split("world",1)[1]
split takes the word(or character) to split on and optionally a limit to the number of splits.
In this example split on "world" and limit it to only one split.
...
jQuery Selector: Id Ends With?
...
If you know the element type then: (eg: replace 'element' with 'div')
$("element[id$='txtTitle']")
If you don't know the element type:
$("[id$='txtTitle']")
More information available
// the old way, needs exact ID: doc...
Good introduction to the .NET Reactive Framework [closed]
...re a good introduction and tutorial to the Microsoft Reactive (Rx) framework?
16 Answers
...
SQL Server Linked Server Example Query
... in Management Studio, I am trying to run a query/do a join between two linked servers.
Is this a correct syntax using linked db servers:
...
Difference between API and ABI
...n we write a program and want to use some library function we write code like:
long howManyDecibels = 123L;
int ok = livenMyHills( howManyDecibels);
and we needed to know that there is a method livenMyHills(), which takes a long integer parameter. So as a Programming Interface it's all expresse...