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Extracting specific columns in numpy array
... 9?
To select multiple columns at once, use
X = data[:, [1, 9]]
To select one at a time, use
x, y = data[:, 1], data[:, 9]
With names:
data[:, ['Column Name1','Column Name2']]
You can get the names from data.dtype.names…
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C++ SFINAE examples?
...that SFINAE stands for "substitution failure is not an error." But can someone show me a good use for SFINAE?
9 Answers
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Simple argparse example wanted: 1 argument, 3 results
... characters. All I want to do is "If arg is A, do this, if B do that, if none of the above show help and quit" .
12 Answer...
How to delete a specific line in a file?
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Why does Python not allow us to do this in one line?
– Ooker
Jul 1 '14 at 16:37
5
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How do I grant myself admin access to a local SQL Server instance?
...ur only way around this is to limit administrative permissions only to the ones who deserve it..
– yoel halb
Oct 11 '12 at 20:18
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Rails: How can I set default values in ActiveRecord?
... in your migration also works part of the time... As has already been mentioned this will not work when you just call Model.new.
Overriding initialize can work, but don't forget to call super!
Using a plugin like phusion's is getting a bit ridiculous. This is ruby, do we really need a plugin just to...
event Action vs event EventHandler
...tually any other event in the system, which I would consider a drawback.
One upside with the dominating design pattern (apart from the power of sameness) is that you can extend the EventArgs object with new properties without altering the signature of the event. This would still be possible if you...
Disable cross domain web security in Firefox
...in_policy. Sometimes also the network.http.refere.XOriginPolicy.
For me, none of these seem to have any effect.
This comment implies there is no built-in way in Firefox to do this (as of 2/8/14).
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class method generates “TypeError: … got multiple values for keyword argument …”
...f the class is declared thus:
class foo(object):
def foodo(self, thing=None, thong='not underwear'):
print thing if thing else "nothing"
print 'a thong is',thong
it behaves as expected.
Explanation:
Without self as the first parameter, when myfoo.foodo(thing="something") is executed...
Breadth First Vs Depth First
...odes in this order
A, B, D, C, E, F
Notice that you go all the way down one leg before moving on.
A breadth first traversal would visit the node in this order
A, B, C, D, E, F
Here we work all the way across each level before going down.
(Note that there is some ambiguity in the traversal or...