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Extract date (yyyy/mm/dd) from a timestamp in PostgreSQL
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kworr
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answered May 26 '11 at 2:40
Wayne ConradWayne ...
Column order manipulation using col-lg-push and col-lg-pull in Twitter Bootstrap 3
I'm now reading documentation on Twitter Bootstrap 3, and tried to follow column ordering as shown in this page but hit the wall. I don't understand why such a code works nor how to correctly specify the setting. What I want to show is one grid, which is consisted of length 5, and the other leng...
Replace all elements of Python NumPy Array that are greater than some value
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346
I think both the fastest and most concise way to do this is to use NumPy's built-in Fancy inde...
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...
linux 下巧妙使用squid代理服务器 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...点。
1．共享网络
2．加快访问速度，节约通信带宽
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原理：
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What is the list of possible values for navigator.platform as of today? [closed]
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3 Answers
3
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How do I remove leading whitespace in Python?
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324
The lstrip() method will remove leading whitespaces, newline and tab characters on a string be...
How to check if a string in Python is in ASCII?
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answered Oct 13 '08 at 0:30
Alexander KojevnikovAlexander Kojevnikov
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What is the most efficient way to concatenate N arrays?
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335
If you're concatenating more than two arrays, concat() is the way to go for convenience and li...
ValueError: setting an array element with a sequence
...aped like a multi-dimensional array. For example
numpy.array([[1,2], [2, 3, 4]])
or
numpy.array([[1,2], [2, [3, 4]]])
will yield this error message, because the shape of the input list isn't a (generalised) "box" that can be turned into a multidimensional array. So probably UnFilteredDuringE...