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What is the most efficient way to create a dictionary of two pandas Dataframe columns?
...ies(df.Letter.values,index=df.Position).to_dict()
Out[9]: {1: 'a', 2: 'b', 3: 'c', 4: 'd', 5: 'e'}
Speed comparion (using Wouter's method)
In [6]: df = pd.DataFrame(randint(0,10,10000).reshape(5000,2),columns=list('AB'))
In [7]: %timeit dict(zip(df.A,df.B))
1000 loops, best of 3: 1.27 ms per loo...
How to remove all leading zeroes in a string
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answered Feb 23 '11 at 23:36
lonesomedaylonesomeday
207k4545 gold badges296296 silver badges306306 bronze badges
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How to get the index of a maximum element in a numpy array along one axis
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answered Mar 29 '11 at 7:39
eumiroeumiro
165k2626 gold badges267267 silver badges248248 bronze badges
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leading zeros in rails
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338
It'd be better to store it as an integer and just display it as you described on runtime. Ever...
Datatype for storing ip address in SQL Server
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130
The technically correct way to store IPv4 is binary(4), since that is what it actually is (no, ...
Find Oracle JDBC driver in Maven repository
...pId>
<artifactId>ojdbc14</artifactId>
<version>10.2.0.3.0</version>
...and the URL to download the file which in this case is
http://www.oracle.com/technology/software/tech/java/sqlj_jdbc/index.html.
Once you've downloaded the JAR just add it to your computer repository...
Why does Assert.AreEqual(T obj1, Tobj2) fail with identical byte arrays
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139
Assert.Equals tests using the Equals method, which by default uses reference equality and, sinc...
Why does parseInt yield NaN with Array#map?
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483
The callback function in Array.map has three parameters:
From the same Mozilla page that you li...
How to calculate the angle between a line and the horizontal axis?
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388
First find the difference between the start point and the end point (here, this is more of a d...