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Django removing object from ManyToMany relationship
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edited Feb 26 at 20:34
Cory Madden
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answered Jun 13 '11 at...
Should I use scipy.pi, numpy.pi, or math.pi?
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edited Sep 28 '12 at 18:45
answered Sep 28 '12 at 18:38
B...
How to pass the -D System properties while testing on Eclipse?
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134
Run -> Run configurations, select project, second tab: “Arguments”. Top box is for your p...
How to truncate string using SQL server
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edited Aug 2 '18 at 9:04
marsze
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answered Feb ...
Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
... return x*2, x*3
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In [3]: df = DataFrame({'a': [1,2,3], 'b': [2,3,4]})
In [4]: df
Out[4]:
a b
0 1 2
1 2 3
2 3 4
In [5]: df["A1"], df["A2"] = zip(*df["a"].map(calculate))
In [6]: df
Out[6]:
a b A1 A2
0 1 2 2 3
1 2 3 4 6
2 3 4 6 9
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How can I insert values into a table, using a subquery with more than one result?
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Mike RyanMike Ryan
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How to run Maven from another directory (without cd to project dir)?
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4 Answers
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How to import existing *.sql files in PostgreSQL 8.4?
I am using PostgreSQL 8.4, and I have some *.sql files to import into a database. How can I do so?
5 Answers
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NSDictionary - Need to check whether dictionary contains key-value pair or not
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194
Just ask it for the objectForKey:@"b". If it returns nil, no object is set at that key.
if ([x...
Vim: How do you open another [No Name] buffer like the one on startup?
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324
There are many ways to open a new buffer with no name, the simplest of which is :new.
:new will...