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What are named pipes?
...
Both on Windows and POSIX systems, named-pipes provide a way for inter-process communication to occur among processes running on the same machine. What named pipes give you is a way to send your data without having the performance penalty of involving the network stack.
Just like you hav...
How to know/change current directory in Python shell?
...e the option of ignoring the environment variable and instead appending to sys.path inside of your script.
– Steven Rumbalski
Nov 23 '11 at 20:31
3
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Converting an int to a binary string representation in Java?
What would be the best way (ideally, simplest) to convert an int to a binary string representation in Java?
16 Answers
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A non-blocking read on a subprocess.PIPE in Python
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A reliable way to read a stream without blocking regardless of operating system is to use Queue.get_nowait():
import sys
from subprocess import PIPE, Popen
from threading import Thread
try:
from queue import Queue, Empty
except ImportError:
from Queue import Queue, Empty # python 2.x
...
Count(*) vs Count(1) - SQL Server
... the same plans.
Contrary to the popular opinion, in Oracle they do too.
SYS_GUID() in Oracle is quite computation intensive function.
In my test database, t_even is a table with 1,000,000 rows
This query:
SELECT COUNT(SYS_GUID())
FROM t_even
runs for 48 seconds, since the function needs ...
Converting String to Int with Swift
...on. However, since the values in the text boxes are string, I am unable to convert them to integers.
30 Answers
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What are the differences between the threading and multiprocessing modules?
...cessing in general.
However, Python* has an added issue: There's a Global Interpreter Lock that prevents two threads in the same process from running Python code at the same time. This means that if you have 8 cores, and change your code to use 8 threads, it won't be able to use 800% CPU and run 8x...
Convert char to int in C#
...ers but the docs say differently:
Use the GetNumericValue methods to
convert a Char object that represents
a number to a numeric value type. Use
Parse and TryParse to convert a
character in a string into a Char
object. Use ToString to convert a Char
object to a String object.
http:...
How to convert a string into double and vice versa?
I want to convert a string into a double and after doing some math on it, convert it back to a string.
12 Answers
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Check if Python Package is installed
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If you mean a python script, just do something like this:
Python 3.3+ use sys.modules and find_spec:
import importlib.util
import sys
# For illustrative purposes.
name = 'itertools'
if name in sys.modules:
print(f"{name!r} already in sys.modules")
elif (spec := importlib.util.find_spec(name))...