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When to use lambda, when to use Proc.new?
In Ruby 1.8, there are subtle differences between proc/lambda on the one hand, and Proc.new on the other.
14 Answers
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Pandas - How to flatten a hierarchical index in columns
I have a data frame with a hierarchical index in axis 1 (columns) (from a groupby.agg operation):
17 Answers
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How do you find the sum of all the numbers in an array in Java?
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271
In java-8 you can use streams:
int[] a = {10,20,30,40,50};
int sum = IntStream.of(a).sum();
Sys...
Detecting programming language from a snippet
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18 Answers
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Bundling data files with PyInstaller (--onefile)
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13 Answers
13
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How do we count rows using older versions of Hibernate (~2009)?
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310
For older versions of Hibernate (<5.2):
Assuming the class name is Book:
return (Number) s...
What to learn for making Java web applications in Java EE 6? [closed]
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174
Even if I know that this will be controversial, my advice would be to start with Java EE 6 onl...
type object 'datetime.datetime' has no attribute 'datetime'
...b/python2.6/lib-dynload/datetime.so'>
>>> datetime.datetime(2001,5,1)
datetime.datetime(2001, 5, 1, 0, 0)
But, if you import datetime.datetime:
>>> from datetime import datetime
>>> datetime
<type 'datetime.datetime'>
>>> datetime.datetime(2001,5,1) # ...
Checking a Python module version at runtime
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edited Jan 20 '12 at 1:30
jldupont
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