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What is the most efficient way to loop through dataframes with pandas? [duplicate]
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The newest versions of pandas now include a built-in function for iterating over rows.
for index, row in df.iterrows():
# do some logic here
Or, if you want it faster use itertuples()
But, unutbu's suggestion to use numpy functions to avoi...
Asynctask vs Thread in android
...PU-intensive tasks, there are basically two ways to do this: Java threads, and Android's native AsyncTask.
Neither one is necessarily better than the other, but knowing when to use each call is essential to leveraging the system's performance to your benefit.
Use AsyncTask for:
Simple network op...
Finding duplicate values in a SQL table
...T(*) > 1
Simply group on both of the columns.
Note: the older ANSI standard is to have all non-aggregated columns in the GROUP BY but this has changed with the idea of "functional dependency":
In relational database theory, a functional dependency is a constraint between two sets of attrib...
View contents of database file in Android Studio
I have been using Android Studio to develop my app since it's was released.
28 Answers
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Chrome developer tools: View Console and Sources views in separate views/vertically tiled?
Chrome developer tools: Is there a way to view the Console tab and the Sources tab in separate views? I often want to look at both of these simultaneously.
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virtualenvwrapper and Python 3
I installed python 3.3.1 on ubuntu lucid and successfully created a virtualenv as below
9 Answers
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How to measure code coverage in Golang?
...e results:
One major new feature of go test is that it can now compute and, with help from a new, separately installed "go tool cover" program, display test coverage results.
The cover tool is part of the go.tools subrepository. It can be installed by running
$ go get golang.org/x/tools/c...
Why do most C developers use define instead of const? [duplicate]
...riable Length Array'. It is an array whose size is not known until runtime and can only be used for automatic variables (i.e. can only be allocated on the stack).
– Bart van Ingen Schenau
Oct 27 '10 at 12:44
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Split string into array of character strings
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How and why? Is this a regex meaning any character? Because in my mind, with the way split works, this should split on only the actual characters (, ?, !, ^, and ). However, it works as you say it does.
– Ty...
Echo a blank (empty) line to the console from a Windows batch file [duplicate]
... decided that I could do much better. You can find my original (simplistic and misguided) answer in the edit history.
If Microsoft had the intent of providing a means of outputting a blank line from cmd.exe, Microsoft surely would have documented such a simple operation. It is this omission that mo...