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Execute code when Django starts ONCE only?
... EDIT: A possible hack is to check the command lines arguments any(x in sys.argv for x in ['makemigrations', 'migrate'])
– Conchylicultor
Oct 29 '16 at 19:31
3
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What specifically are wall-clock-time, user-cpu-time, and system-cpu-time in UNIX?
...n the names, but what specifically are wall-clock-time, user-cpu-time, and system-cpu-time in UNIX?
4 Answers
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Comparing date ranges
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I created function to deal with this problem in MySQL. Just convert the dates to seconds before use.
DELIMITER ;;
CREATE FUNCTION overlap_interval(x INT,y INT,a INT,b INT)
RETURNS INTEGER DETERMINISTIC
BEGIN
DECLARE
overlap_amount INTEGER;
IF (((x <= a) AND (a < y)) OR...
How to convert a char array to a string?
Converting a C++ string to a char array is pretty straightorward using the c_str function of string and then doing strcpy . However, how to do the opposite?
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Int to Char in C#
What is the best way to convert an Int value to the corresponding Char in Utf16, given that the Int is in the range of valid values?
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Best approach to remove time part of datetime in SQL Server
...pe resulted in an out-of-range datetime value Try: select DATEDIFF(dd, 0, convert(datetime2(0), '0218-09-12', 120))
– Bernhard Döbler
Sep 12 '18 at 16:03
1
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Save ArrayList to SharedPreferences
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After API 11 the SharedPreferences Editor accepts Sets. You could convert your List into a HashSet or something similar and store it like that. When you read it back, convert it into an ArrayList, sort it if needed and you're good to go.
//Retrieve the values
Set<String> set = myScore...
How to print Unicode character in Python?
...oo.py:
#!/usr/bin/python -tt
# -*- coding: utf-8 -*-
import codecs
import sys
UTF8Writer = codecs.getwriter('utf8')
sys.stdout = UTF8Writer(sys.stdout)
print(u'e with obfuscation: é')
Run it and pipe output to file:
python foo.py > tmp.txt
Open tmp.txt and look inside, you see this:
el@a...
Converting from a string to boolean in Python?
Does anyone know how to do convert from a string to a boolean in Python? I found this link . But it doesn't look like a proper way to do it. I.e. using built-in functionality, etc.
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Does Java read integers in little endian or big endian?
...or least significant byte.
Endianness is not bit based but byte based.
To convert from unsigned byte to a Java integer:
int i = (int) b & 0xFF;
To convert from unsigned 32-bit little-endian in byte[] to Java long (from the top of my head, not tested):
long l = (long)b[0] & 0xFF;
l += ((...