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SQLite - UPSERT *not* INSERT or REPLACE
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83
This answer has be updated and so the comments below no longer apply.
2018-05-18 STOP PRESS.
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What is the performance cost of having a virtual method in a C++ class?
...bout the cost unless the function is something like a trivial Get()/Set() accessor, in which anything other than inline is kind of wasteful. A 7ns overhead on a function that inlines to 0.5ns is severe; a 7ns overhead on a function that takes 500ms to execute is meaningless.
The big cost of virtual...
Unit test naming best practices [closed]
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83
@Peri, I think it is a tradeoff. On one hand your test names may become outdated, on the other hand you can't tell what method your test i...
how can you easily check if access is denied for a file in .NET?
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Robert RossneyRobert Rossney
83.7k2323 gold badges134134 silver badges207207 bronze badges
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SQLAlchemy: print the actual query
...= (
5,
u'snowman: ☃',
b'UTF-8 snowman: \xe2\x98\x83',
datetime.now(),
Decimal('3.14159'),
10 ** 20, # a long integer
)
statement = select([mytable]).where(mytable.c.mycol.in_(values)).limit(1)
print(literalquery(statement))
if __name_...
How to see which commits in one branch aren't in the other?
...mount of commits. Some of the commits are cherry picked in next . Also I added some commits to next which are merged to devel .
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Function to Calculate Median in SQL Server
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83
In SQL Server 2012 you should use PERCENTILE_CONT:
SELECT SalesOrderID, OrderQty,
PERCENTI...
What is the difference between float and double?
...ct roots to 10 significant digits are, r1 = 2.000316228 and r2 = 1.999683772.
Using float and double, we can write a test program:
#include <stdio.h>
#include <math.h>
void dbl_solve(double a, double b, double c)
{
double d = b*b - 4.0*a*c;
double sd = sqrt(d);
double ...
Which encoding opens CSV files correctly with Excel on both Mac and Windows?
... | Unicode Range |
| € | 128 | 8364 | 0x80 | U+20AC | &euro; | euro sign | Currency Symbols |
| ‚ | 130 | 8218 | 0x82 | U+201A | &sbquo; | single low-9 quotation mark ...
What does 'synchronized' mean?
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83
The synchronized keyword is one of the tools that make your code thread safe. Just using synchronized on a method or variable in itself ma...