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Bash command to sum a column of numbers [duplicate]
... time paste -sd+ file | bc
1448700364
real 1m36.960s
user 1m24.515s
sys 0m1.772s
$ time awk '{s+=$1}END{print s}' file
1448700364
real 0m45.476s
user 0m40.756s
sys 0m0.287s
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When should I use cross apply over inner join?
...ross apply. It might have other uses but I think this is the reason it was introduced. Without it table functions would not be usable in a lot of situations. technet.microsoft.com/en-us/library/ms175156.aspx
– MikeKulls
Aug 12 '11 at 0:38
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C++ convert hex string to signed integer
I want to convert a hex string to a 32 bit signed integer in C++.
9 Answers
9
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pythonw.exe or python.exe?
...ng console window, python.exe opens a new console window.
Standard streams sys.stdin, sys.stdout and sys.stderr are connected to the console window.
Execution is synchronous when launched from a cmd.exe or PowerShell console window: See eryksun's 1st comment below.
If a new console window was crea...
How to add to the PYTHONPATH in Windows, so it finds my modules/packages?
... for me really well on windows.
My Computer > Properties > Advanced System Settings > Environment Variables >
Just add the path as C:\Python27 (or wherever you installed python)
OR
Then under system variables I create a new Variable called PythonPath. In this variable I have C:\Pyth...
Convert a string to int using sql query
How to convert a string to integer using SQL query on SQL Server 2005?
4 Answers
4
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How to convert a column number (e.g. 127) into an Excel column (e.g. AA)
How do you convert a numerical number to an Excel column name in C# without using automation getting the value directly from Excel.
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How to convert an IPv4 address into a integer in C#?
I'm looking for a function that will convert a standard IPv4 address into an Integer. Bonus points available for a function that will do the opposite.
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Convert floats to ints in Pandas?
...eed them to be displayed as integers, or, without comma. Is there a way to convert them to integers or not display the comma?
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Way to read first few lines for pandas dataframe
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I think you can use the nrows parameter. From the docs:
nrows : int, default None
Number of rows of file to read. Useful for reading pieces of large files
which seems to work. Using one of the standard large test files (988504479 bytes, 5344499 lines):
In [1]: import pandas as pd...