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Rails where condition using NOT NIL
... the database is.
– Adam Lassek
Aug 20 '16 at 0:00
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How do I convert a Ruby class name to a underscore-delimited symbol?
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edited Sep 22 '13 at 20:18
answered Sep 20 '13 at 10:56
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Filtering a list based on a list of booleans
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edited Sep 6 '13 at 20:32
answered Sep 6 '13 at 20:13
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Eclipse Workspaces: What for and why?
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edited Jun 20 at 9:12
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111 silver badge
answered Dec 23 '14 at 20:47
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what is the most efficient way of counting occurrences in pandas?
...se-case :)
– Vaidøtas I.
Feb 21 at 20:06
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Add missing dates to pandas dataframe
...could use Series.reindex:
import pandas as pd
idx = pd.date_range('09-01-2013', '09-30-2013')
s = pd.Series({'09-02-2013': 2,
'09-03-2013': 10,
'09-06-2013': 5,
'09-07-2013': 1})
s.index = pd.DatetimeIndex(s.index)
s = s.reindex(idx, fill_value=0)
pri...
Reading a binary file with python
...using struct.unpack:
The start bytes: struct.unpack("iiiii", fileContent[:20])
The body: ignore the heading bytes and the trailing byte (= 24); The remaining part forms the body, to know the number of bytes in the body do an integer division by 4; The obtained quotient is multiplied by the string ...
Why split the tag when writing it with document.write()?
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I think is for prevent the browser's HTML parser from interpreting the <script>, and main...
How do I create a right click context menu in Java Swing?
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answered Apr 20 '09 at 7:32
jjnguyjjnguy
125k4949 gold badges284284 silver badges319319 bronze badges
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Correct use of flush() in JPA/Hibernate
...e a complete rollback.
– Flavio
Jun 20 '11 at 8:08
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You can rollback the DB, but it will not ro...