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What is the purpose of std::make_pair vs the constructor of std::pair?
...
int main() {
MyClass<int> my_class(1);
}
then:
g++-8 -Wall -Wextra -Wpedantic -std=c++17 main.cpp
compiles happily, but:
g++-8 -Wall -Wextra -Wpedantic -std=c++14 main.cpp
fails with:
main.cpp: In function ‘int main()’:
main.cpp:13:13: error: missing template arguments before...
How do you read from stdin?
... help on the builtin input from Python 3:
input(prompt=None, /)
Read a string from standard input. The trailing newline is stripped.
The prompt string, if given, is printed to standard output without a
trailing newline before reading input.
If the user hits EOF (*nix: Ctrl...
What is stability in sorting algorithms and why is it important?
...r if you have two input lists A,B which are identical except list B has an extra entry, the outputs for a stable sort will be identical except that B has that same extra entry. And +1 for last pgph.
– greggo
Feb 10 '13 at 1:43
...
Why is MySQL's default collation latin1_swedish_ci?
...general_ci.
Compared to latin1_general_ci it has support for a variety of extra characters used in European languages. So it’s a best choice if you don’t know what language you will be using, if you are constrained to use only single byte character sets.
...
Container-fluid vs .container
...s as you change the width of your window/browser by any amount, leaving no extra empty space on the sides ever, unlike how .container does. (Hence the naming: "fluid" as opposed to "digital", "discrete", "chunked", or "quantized").
.container resizes in chunks at several certain widths. In other wo...
How to write one new line in Bitbucket markdown?
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this places an extra blank link between line1 and line2 in bitbucket readme.md files
– simpleuser
Jul 17 '19 at 21:34
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How do I map lists of nested objects with Dapper
...ltiplication across locations, I use Distinct() to remove potential dups:
string query = @"SELECT c.*, l.*
FROM Course c
INNER JOIN Location l ON c.LocationId = l.Id";
using (SqlConnection conn = DB.getConnection())
{
conn.Open();
var courseDictionary = new Dictionary<Guid, Cours...
NOT IN vs NOT EXISTS
...der Details] contains any NULL ProductIds is to return no results. See the extra anti semi join and row count spool to verify this that is added to the plan.
If Products.ProductID is also changed to become NULL-able the query then becomes
SELECT ProductID,
ProductName
FROM Products p
WH...
Print in one line dynamically
...s about this that may be surprising:
The \r goes at the beginning of the string so that, while the program is running, the cursor will always be after the number. This isn't just cosmetic: some terminal emulators get very confused if you do it the other way around.
If you don't include the last l...
List or IList [closed]
...interfaces really shine. Say I have a function that returns IEnumerable<string>, inside the function I may use a List<string> for an internal backing store to generate my collection, but I only want callers to enumerate it's contents, not add or remove. Accepting an interface as a parame...