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How can I use a Python script in the command line without cd-ing to its directory? Is it the PYTHONP
...pt call vs. python import. Yes, I will in fact use export PATH=$PATH:/home/etc
– Randy Skretka
Nov 11 '13 at 23:35
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What happens to C# Dictionary lookup if the key does not exist?
... be better, but if you want to check if the dictionary contains the key in order to avoid duplicate additions, I would say ContainsKey is just as good (if not better).
– Fredrik Mörk
Jan 26 '10 at 11:25
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How to read a large file - line by line?
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Two memory efficient ways in ranked order (first is best) -
use of with - supported from python 2.5 and above
use of yield if you really want to have control over how much to read
1. use of with
with is the nice and efficient pythonic way to read large files....
LINQ: When to use SingleOrDefault vs. FirstOrDefault() with filtering criteria
... on how you sort the records. You can use OrderBy() or OrderByDescending() etc before calling FirstOrDefault. See the OP's code example.
– Gan
May 19 '14 at 9:02
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In SQL Server, when should you use GO and when should you use semi-colon ;?
...o that particular batch.
Any declarations of Variables, Table Variables, etc do not go across GO statements.
#Temp tables are local to a connection, so they span across GO statements.
Semicolon
A Semicolon is a statement terminator. This is purely used to identify that a particular statement ha...
Why don't self-closing script elements work?
...ting and uniting the implementations.
(This is why <br/> <hr/> etc. are valid HTML 5 despite being invalid HTML4.)
Self-closing <script> is one of the tags where implementations used to differ.
It used to work in Chrome, Safari, and Opera; to my knowledge it never worked in Intern...
datetime dtypes in pandas read_csv
...to read col1 and col2 as strings, which they most likely are ("2016-05-05" etc.) and after having read the string, the date_parser for each column will act upon that string and give back whatever that function returns.
Defining your own date parsing function:
The pandas.read_csv() function also ha...
With arrays, why is it the case that a[5] == 5[a]?
... then a[0] is at 0x1230, a[1] is at 0x1234, a[2] at 0x1238...a[5] at x1244 etc. If we just add 5 to 0x1230, we get 0x1235, which is wrong.
– James Curran
Dec 19 '08 at 17:21
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Docker - a way to give access to a host USB or serial device?
...Alternatively, assuming your USB device is available with drivers working, etc. on the host in /dev/bus/usb, you can mount this in the container using privileged mode and the volumes option. For example:
docker run -t -i --privileged -v /dev/bus/usb:/dev/bus/usb ubuntu bash
Note that as the name ...
What is the difference between concurrency and parallelism?
... is held by your assistant. Both of you can then work on the presentation, etc.
Back to Computer Science
In computing world, here are example scenarios typical of each of these cases:
Case 1: Interrupt processing.
Case 2: When there is only one processor, but all executing tasks have wait tim...