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What is the best way to use a HashMap in C++?
...by the key, insert and access is in O(log n). Usually the standard library internally uses red black trees for ordered maps. But this is just an implementation detail. In an unordered map insert and access is in O(1). It is just another name for a hashtable.
An example with (ordered) std::map:
#in...
What is the HMVC pattern?
...ng convention" is used for internal and external requests, it's trivial to convert "internal" service requests to "external" requests or vice versa as the need arises.
Whilst this is a sensible architectural pattern, giving it its own name seems unnecessary (Symfony2 describes the same concept "sub...
MySQL JOIN the most recent row only?
... a synonym for INNER JOIN.
Test case:
CREATE TABLE customer (customer_id int);
CREATE TABLE customer_data (
id int,
customer_id int,
title varchar(10),
forename varchar(10),
surname varchar(10)
);
INSERT INTO customer VALUES (1);
INSERT INTO customer VALUES (2);
INSERT INTO custo...
Calling C/C++ from Python?
...
You should have a look at Boost.Python. Here is the short introduction taken from their website:
The Boost Python Library is a framework for interfacing Python and
C++. It allows you to quickly and seamlessly expose C++ classes
functions and objects to Python, and vice-versa...
Scala @ operator
...attern to a variable. Consider the following, for instance:
val o: Option[Int] = Some(2)
You can easily extract the content:
o match {
case Some(x) => println(x)
case None =>
}
But what if you wanted not the content of Some, but the option itself? That would be accomplished with this...
Why does Sql Server keep executing after raiserror when xact_abort is on?
..._id('tempdb..#RAISERRORS') is null)
create table #RAISERRORS (ErrorNumber int, ErrorMessage varchar(400), ErrorSeverity int, ErrorState int, ErrorLine int, ErrorProcedure varchar(128));
-- this will determine if the transaction level of the query to programatically determine if we need to begin a ...
How to suppress scientific notation when printing float values?
...o say, "you manage the display of precision yourself." The actual (Python internal) precision isn't changed, as is often done in other languages.
– JS.
Aug 22 '12 at 20:42
ad...
How does Duff's device work?
...rticle on Wikipedia on the Duff's device , and I don't get it. I am really interested, but I've read the explanation there a couple of times and I still don't get it how the Duff's device works.
...
Algorithm for Determining Tic Tac Toe Game Over
...heck anti diag, I couldn't figure out a non loop way to determine if the point was on the anti diag so thats why that step is missing
public class TripleT {
enum State{Blank, X, O};
int n = 3;
State[][] board = new State[n][n];
int moveCount;
void Move(int x, int y, State s){...
Can I initialize a C# attribute with an array or other variable number of arguments?
...icer to consumers, IMO):
class MyCustomAttribute : Attribute {
public int[] Values { get; set; }
public MyCustomAttribute(params int[] values) {
this.Values = values;
}
}
[MyCustomAttribute(3, 4, 5)]
class MyClass { }
Your syntax for array creation just happens to be off:
cl...