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Replace None with NaN in pandas dataframe
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answered May 19 '14 at 17:18
Guillaume JacquenotGuillaume Jacquenot
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How do you allow spaces to be entered using scanf?
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answered Aug 8 '09 at 4:59
paxdiablopaxdiablo
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What is the difference between const int*, const int * const, and int const *?
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How can I add items to an empty set in python
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edited Jul 7 '13 at 10:28
answered Jul 7 '13 at 10:23
Ash...
Should JAVA_HOME point to JDK or JRE?
I pointed the JAVA_HOME to C:\Program Files (x86)\Java\jre7 . It works fine. Afterwards, I unzipped ant and set up the environment variables related to Ant, I got the following error messages after typing "ant -version"
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How to raise a ValueError?
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raise ValueError('could not find %c in %s' % (ch,str))
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PHP foreach loop key value
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answered Dec 2 '09 at 18:03
PekkaPekka
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Literal notation for Dictionary in C#?
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edited Apr 8 '15 at 16:05
answered Feb 3 '15 at 18:08
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How long is the SHA256 hash?
...mal representation, 4 bits are enough to encode each character (instead of 8, like for ASCII), so 256 bits would represent 64 hex characters, therefore you need a varchar(64), or even a char(64), as the length is always the same, not varying at all.
And the demo :
$hash = hash('sha256', 'hello, wo...
Reading an Excel file in python using pandas
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