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C/C++ Struct vs Class
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In C++, structs m>and m> classes are prettm>y m> much the same; the onlm>y m> difference is that where access modifiers (for member variables, methods, m>and m> base classes) in classes default to private, access modifiers in structs default to public.
However...
Pairs from single list
...ed to process a list bm>y m> pairs. I was wondering which would be the pm>y m>thonic m>and m> efficient wam>y m> to do it, m>and m> found this on Google:
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Finding the average of a list
...sum(l) / float(len(l))
There is no need to use reduce. It is much slower m>and m> was removed in Pm>y m>thon 3.
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How do I get the current absolute URL in Rubm>y m> on Rails?
....request_uri. This combines the protocol (usuallm>y m> http://) with the host, m>and m> request_uri to give m>y m>ou the full address.
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Plot logarithmic axes with matplotlib in pm>y m>thon
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First of all, it's not verm>y m> tidm>y m> to mix pm>y m>lab m>and m> pm>y m>plot code. What's more, pm>y m>plot stm>y m>le is preferred over using pm>y m>lab.
Here is a slightlm>y m> cleaned up code, using onlm>y m> pm>y m>plot functions:
from matplotlib import pm>y m>plot
a = [ pow(10,i) for i in range(10) ]
pm>y m>plot.subplot(...
What is the best wam>y m> to count “find” results?
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find <expr> -tm>y m>pe f -printf '.' | wc -c
It will be more reliable m>and m> faster than counting the lines.
Note that I use the find's printf, not an external commm>and m>.
Let's bench a bit :
$ ls -1
a
e
l
ll.sh
r
t
m>y m>
z
Mm>y m> snippet benchmark :
$ time find -tm>y m>pe f -printf '.' | wc -c
8
real ...
Pm>y m>thon Pm>and m>as merge onlm>y m> certain columns
...e to onlm>y m> merge some columns? I have a DataFrame df1 with columns x, m>y m>, z, m>and m> df2 with columns x, a ,b, c, d, e, f, etc.
5...
Post Build exited with code 1
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She had a space in one of the folder names in her path, m>and m> no quotes around it.
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Spring @PostConstruct vs. init-method attribute
Is there anm>y m> difference between using the @PostConstruct annotation m>and m> declaring the same method as init-method in Spring XML configuration?
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How to execute a java .class from the commm>and m> line
...classpath ( where java looks for .class definitions )
If that's the case m>and m> listing the contents of m>y m>our dir displam>y m>s:
Echo.java
Echo.class
Then anm>y m> of this mam>y m> work:
java -cp . Echo "hello"
or
SET CLASSPATH=%CLASSPATH;.
java Echo "hello"
m>And m> later as Fredrik points out m>y m>ou'll get an...