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How to select the row with the maximum value in each group
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answered Feb 17 '16 at 23:06
Xi LiangXi Liang
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How to determine if a type implements a specific generic interface type
...ely!
– Brad Heller
Jul 27 '10 at 23:06
1
Depending on your needs, you may find you need to recur ...
How can I change the copyright template in Xcode 4?
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__MyCompanyName__ being ugly (or if you aren't coding for the company set up in your profile), let's change it.
Click on your project root in the Project Navigator on the left
Enable your Utilities view on the right while t...
How can I filter a Django query with a list of values?
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From the Django documentation:
Blog.objects.filter(pk__in=[1, 4, 7])
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Numpy: find first index of value fast
...The code will be compiled so it will be fast.
@jit(nopython=True)
def find_first(item, vec):
"""return the index of the first occurence of item in vec"""
for i in xrange(len(vec)):
if item == vec[i]:
return i
return -1
and then:
>>> a = array([1,7,8,32])
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Easiest way to copy a table from one database to another?
...NT;
– Weston Ganger
Mar 7 '17 at 18:06
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Which is faster in Python: x**.5 or math.sqrt(x)?
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In python 2.6 the (float).__pow__() function uses the C pow() function and the math.sqrt() functions uses the C sqrt() function.
In glibc compiler the implementation of pow(x,y) is quite complex and it is well optimized for various exceptional cases...
Why is there “data” and “newtype” in Haskell? [duplicate]
... was True or False:
helloMe :: CoolBool -> String
helloMe (CoolBool _) = "hello"
Instead of applying this function to a normal CoolBool, let's throw it a curveball and apply it to undefined!
ghci> helloMe undefined
"*** Exception: Prelude.undefined
Yikes! An exception! No...
How can I convert String to Int?
... require.
– uncleO
Jun 19 '09 at 20:06
Exactly. It returns false if the conversion failed.
– n8w...
Is there a format code shortcut for Visual Studio?
... options...
– Soumya
Feb 9 '11 at 7:06
2
In addition, in the Tools > Options, go to Text Edito...