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How to unzip a list of tuples into individual lists? [duplicate]
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Use zip(*list):
>>> l = [(1,2), (3,4), (8,9)]
>>> list(zip(*l))
[(1, 3, 8), (2, 4, 9)]
The zip() function pairs up the elements from all inputs, starting with the first values, then the second, etc. By using *l you apply all tuples in l as separat...
Postgres NOT in array
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137
SELECT COUNT(*) FROM "messages" WHERE NOT (3 = ANY (recipient_ids))
You can always negate WHE...
How to determine the longest increasing subsequence using dynamic programming?
...N) = O(N log N)
Now let's do a real example:
Collection of integers:
2 6 3 4 1 2 9 5 8
Steps:
0. S = {} - Initialize S to the empty set
1. S = {2} - New largest LIS
2. S = {2, 6} - New largest LIS
3. S = {2, 3} - Changed 6 to 3
4. S = {2, 3, 4} - New largest LIS
5. S = {1, 3, 4} - Changed 2 to 1...
How do you specify a different port number in SQL Management Studio?
...am trying to connect to a Microsoft SQL 2005 server which is not on port 1433. How do I indicate a different port number when connecting to the server using SQL Management Studio?
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How To Get IPython Notebook To Run Python 3?
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To set IPython Notebook to run Python 3 instead of 2 on my MAC 10.9, I did the following steps
$ sudo pip3 install ipython[all]
Then
$ ipython3 notebook
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What exactly does += do in python?
...r
return self.num
>>> a = Adder(2)
>>> a += 3
in __iadd__ 3
>>> a
5
Hope this helps.
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Responsive image align center bootstrap 3
I do a catalog using Bootstrap 3. When displayed on tablets, the product images look ugly because of their small size (500x500) and a width of 767 pixels in the browser. I want to put the image in the center of the screen, but for some reason I can not. Who be will help solve the problem?
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How to make PyCharm always show line numbers
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Version 2.6 and above:
PyCharm (far left menu) -> Preferences... -> Editor (bottom left ...
How to easily truncate an array with JavaScript?
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edited May 21 '15 at 1:37
David Mason
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