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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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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...
`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 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...
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 ).
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List changes unexpectedly after assignment. How do I clone or copy it to prevent this?
While using new_list = my_list , any modifications to new_list changes my_list everytime. Why is this, and how can I clone or copy the list to prevent it?
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When NOT to use yield (return) [duplicate]
...t);
}
}
which still uses yield return, but is much smarter about it. Now we are O(n) in time and O(h) in heap space, and O(1) in stack space.
Further reading: see Wes Dyer's article on the subject:
http://blogs.msdn.com/b/wesdyer/archive/2007/03/23/all-about-iterators.aspx
...
Explicitly select items from a list or tuple
...ilt-in, but you can make a subclass of list that takes tuples as "indexes" if you'd like:
class MyList(list):
def __getitem__(self, index):
if isinstance(index, tuple):
return [self[i] for i in index]
return super(MyList, self).__getitem__(index)
seq = MyList("foo...
How to pick just one item from a generator?
... would like an item, use
next(g)
(or g.next() in Python 2.5 or below).
If the generator exits, it will raise StopIteration. You can either catch this exception if necessary, or use the default argument to next():
next(g, default_value)
...