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Pandas dataframe get first row of each group
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248
>>> df.groupby('id').first()
value
id
1 first
2 first
3 first
4 ...
Array initializing in Scala
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143
scala> val arr = Array("Hello","World")
arr: Array[java.lang.String] = Array(Hello, World)
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How to catch integer(0)?
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164
That is R's way of printing a zero length vector (an integer one), so you could test for a being...
How to check whether a pandas DataFrame is empty?
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aIKidaIKid
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Stream.Seek(0, SeekOrigin.Begin) or Position = 0
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https://referencesource.microsoft.com/#mscorlib/system/io/memorystream.cs,482
The cost is almost identical (3 ifs and some arithmetics). However this is only true for jumping to absolute offsets like Position = 0 and not relative offsets like Position += 0, in which case Seek seems slightly bette...
leading zeros in rails
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edited Jun 29 '15 at 20:49
Joshua Pinter
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a...
How to scale SVG image to fill browser window?
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answered Apr 13 '11 at 4:33
PhrogzPhrogz
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Putting text in top left corner of matplotlib plot
...Out[20]: <matplotlib.collections.CircleCollection object at 0x0000000007439A90>
In [21]: text(0.1, 0.9,'matplotlib', ha='center', va='center', transform=ax.transAxes)
Out[21]: <matplotlib.text.Text object at 0x0000000007415B38>
In [22]:
The ha and va parameters set the alignment of y...
Difference between exit(0) and exit(1) in Python
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answered Feb 24 '12 at 5:50
manojldsmanojlds
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GoTo Next Iteration in For Loop in java
...+){
if(i==2){
continue;
}
System.out.print(i);
}
This will print
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