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What's the difference between a file descriptor and file pointer?
... systems.
You pass "naked" file descriptors to actual Unix calls, such as read(), write() and so on.
A FILE pointer is a C standard library-level construct, used to represent a file. The FILE wraps the file descriptor, and adds buffering and other features to make I/O easier.
You pass FILE pointe...
Python recursive folder read
... (been writing it for about an hour).
I am writing a script to recursively read the contents of text files in a folder structure.
...
What does “atomic” mean in programming?
... and a second one which writes the last 32 bits. That means that another thread might read the value of foo, and see the intermediate state.
Making the operation atomic consists in using synchronization mechanisms in order to make sure that the operation is seen, from any other thread, as a single...
How to profile a bash shell script slow startup?
...
Profiling bash (4 answers)
Edit: March 2016 add script method
Reading this and because profiling is an important step, I've done some test and research about this whole SO question and already posted answers.
There is 4+ answer:
The first is based on @DennisWilliamson's idea but with...
How to read the RGB value of a given pixel in Python?
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For future readers: pip install pillow will install PIL successfully and fairly quickly (may need sudo if not in a virtualenv).
– Christopher Shroba
Aug 30 '15 at 1:59
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How to search for a string in text files?
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The reason why you always got True has already been given, so I'll just offer another suggestion:
If your file is not too large, you can read it into a string, and just use that (easier and often faster than reading and checking line per line):
with open('example....
What GRANT USAGE ON SCHEMA exactly do?
...Postgres database, so this is probably a stupid question. I assigned basic read-only permissions to the db role that must access the database from my php scripts, and I have a curiosity: if I execute
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How to Find And Replace Text In A File With C#
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Read all file content. Make a replacement with String.Replace. Write content back to file.
string text = File.ReadAllText("test.txt");
text = text.Replace("some text", "new value");
File.WriteAllText("test.txt", text);
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How dangerous is it to access an array out of bounds?
...sing an array outside of its bounds (in C)? It can sometimes happen that I read from outside the array (I now understand I then access memory used by some other parts of my program or even beyond that) or I am trying to set a value to an index outside of the array. The program sometimes crashes, but...
How do I pass a string into subprocess.Popen (using the stdin argument)?
...).stdin
Warning Use communicate() rather than
stdin.write(), stdout.read() or
stderr.read() to avoid deadlocks due
to any of the other OS pipe buffers
filling up and blocking the child
process.
So your example could be written as follows:
from subprocess import Popen, PIPE, STDOUT
...