Simple data sharing between theads
Passing parameters by reference
Multi-threading allows you to execute portions of your code concurrently. While on a single CPU the benefits of multi-threading are limited, multi-core systems allow true concurent execution, thus reducing the time it takes for the task to finish.
The basic threading is easy, you just declare a function and run it in thread.
#include <thread>
#include <iostream>
using namespace std;
void complicatedCalculation1()
{//Do stuff here}
void complicatedCalculation2()
{//Do stuff here}
int main()
{
//Creates a thread and starts it
thread calc1Thread(complicatedCalculation1);
//Creates a thread and starts it
thread calc2Thread(complicatedCalculation1);
//Wait for each thread to finish
calc1Thread.join();
calc2Thread.join();
cout<<"All done"<<endl;
return 0;
}
MS SQL Server cyclical reference nonsense
On SQL Server 2008
Most relational database software allows a change in one table to trigger changes in other tables based on a foreign key relation. For example let’s say we have two tables: Users and Orders that have a foreign relation defined on the user id field.
Users Orders --------- -------- USERID ORDERID USERNAME USERID
SQL Server allows you to define cascading deletes so that when you delete an entry from the users table, all related entries in the orders table are also going to be deleted.
Obama locks in another 4 years
Florida goes to the President
Obama has locked in the win. He has a solid lead in Ohio and Florida, and that means Romney is done for.
CNN won’t project Florida – I don’t think anyone would dare project Florida, give what happened in 2000, but 86% of the vote is in, and Obama has the lead. The remaining 14% of the vote that remains to be counted are in Democratic stronghold territory, which means one thing – Obama gets 4 more years!
Also available in : Bulgarian
The blame game
The mainstream media
Talk to a Ron Paul supporter for more than 5 minutes, and you will most certainly hear about the great conspiracy perpetrated against Ron Paul by the mainstream media.
It’s not just him though. In the republican primaries, Newt Gingrich went ballistic on the moderator for asking him to comment on his ex-wife’s allegations of infidelity. Gingrich seems to think that “much of the media” is spreading “vicious attacks”.
The other day I was watching Fox News at the gym – the talking head went on a rant about how the “mainstream media” is not reporting on the alleged Libya cover up.
What mainstream media is this guy talking about? Last time I checked, Fox had higher number of average daily viewers than MSNBC and CNN combined!
I’ll go out on limb here and guess that you’ll never about the “mainstream media” from a politician who is getting good press. Somehow it’s only the people who are not taken seriously or the people who can’t get enough attention, who see a “mainstream” media conspiracy.
Microsoft got cool? Apple is getting clobbered in the ad wars?
The new Iphone 5 has been out for some time now. The ads are back on the air – advertising the Iphone’s groundbreaking new features – the shape of the headphones! Who else but Apple would’ve thought that ear buds have to match the shape of the earlobe? And that you can use your thumb to scroll your smart phone’s screen? Those are breathtaking innovations! I guess the 2% R&D budget is paying off…
For sure, the sales are through the roof, but Apple’s monopoly on cool is starting to slip. Samsung are clobbering them with their Samsung Galaxy S3 ads; the message is clear – the cool kids have moved on. Samsung is doing to Apple, what Apple did to Microsoft with the Mac vs PC commercials! And if Apple keeps pushing the same old products, it just might work!
Speaking of big old Microsoft – they got cool! I’m talking about the Surface table commercial that’s playing on TV. Snapping keyboards, lively, colorful, young people jumping around, dancing … The first few times I saw it, I didn’t even realize it’s a Microsoft commercial.
Whoever came up with that commercial has to be given an award. Compared to the weird and creepy Bill Gates & Seinfeld commercial, this one is an incredible improvement. I mean, who in their right mind will put Bill Gates in a commercial? Actually I know who – Apple.
I’m glad for them. Finally, 5 years after they introduced the multi-touch Surface table computer, Microsoft are doing something with the technology. The tablet look pretty good, but they have to get the cool factor working for them.
That’s extremely difficult. Microsoft is synonymous to uncool. They are not helping themselves either – copying everything from everyone, they’ve become target for ridicule They even cloned Steve Jobs for the introduction of this very same Surface tablet!
I sure hope this new ad is a break with practice.
Google’s gtest not handling friend tests correctly
I was using Google’s gtest unit test framework today and I found an annoying problem – you can’t properly friend test methods that are in a different namespace than the class being tested.
Here is a typical situation:
namespace MyNamespace
{
class MyClass
{
public:
MyClass(int inData): data(inData){}
private:
int data;
};
}//end namespace
namespace MyNamespace
{
namespace TEST
{
class MyTestClassFixture
{
static const int fixtureData;
}
static const MyTestClassFixture::fixtureData = 5;
TEST_F(MyTestClassFixture, TestEqual)
{
MyClass testClass(5);
ASSERT_EQ(fixtureData, testClass.data);
}
}
}
Oracle C++ API non-sense
Parameterized statement throws invalid number SQLExceptions
I spent 2 hours trying to figure out this nonsense. Here is the problem:
Environment *env = Environment::createEnvironment();
Connection *conn = env->createConnection("username", "password",
connectionString);
string sqlQueryText = "UPDATE myTable SET field4 =:p4, field3 =:p3
WHERE field2 :=p2 AND field1 :=p1";
Statement* updateStatement = conn->createStatement(sqlQueryText);
updateStatement.setInt(1, field1Var);
updateStatement.setString(2, field2Var);
updateStatement.setInt(3, field3Var);
updateStatement.setString(4, field4Var);
updateStatement.executeUpdate(conn);
Guard you privacy
Using a password manager
In the first article of this series, I went on a pretty long rant about how people are not using secure passwords, how that could lead to their information being stolen, etc, etc.
In this one, I’ll go over what I’m using for my own online security. It’s all based on free software and services,which have been around for years and everyone probably knows about, but since I have not seen any comprehensive tutorials on how to do this, I’ll try to explain in details. Feel free to skip ahead if you think I’m wasting your time, you are not interested in the functionality I describe or whatever.
So enough beating around the bush…
Фонетичен Дворак за български
Фонетична подредба за български език
Когато реших че е крайно време да се науча да пиша по 10-то пръстната система, се разрових в Интернет и намерих системата Дворак. Според Интернет (а всички знаем че Интернет знае всичко и е безгрешен), Дворак се учи по-лесно, скороста на печатане е по-висока, по-ергономична е, намалят стреса на пръстите – абе с две думи само където не ти поднася закуска в леглото.
А може и да има такава опция, но да не съм я намерил още…
Научих Дворка и съм доволен. Има обаче един проблем. Никъде не можах да намеря фонетична Дворак подредба за Български език. Да седна да уча БДС клавиатурна подредба, не ми се занимава, а фонетичната която идва с Уиндоус следва АНСИ подредбата…
Този проблем ме мъчи от доста време, така че най-накрая реших да създам една фонетична Дворак подредба. Ето го резултата.
Mars rover Curiosity set to land tonight
Watch it live on NASA TV
NASA’s new Mars rover Curiosity is scheduled to land on Mars tonight. The best part is that it will be broadcasted live on NASA TV, starting 23:00 (11pm) Eastern time.
Of course, every landing on Mars is exciting, but this one in particular will be spectacular.The previous two rovers, Spirit and Opportunity, which spend over 5 years exploring the Mars’ surface, used a “conventional” landing – after they entered the atmosphere, parachutes were deployed to slow the decent down and the impact of the touch down was handled by a high tech bouncing ball which wrapped the rovers. After the ball stopped bouncing, it opened up and the rover rolled out.
Curiosity however is the size of a car and too heavy to do that, so NASA devised a completely new procedures – which they could not even test completely on Earth. The re-entry will be pretty much the same, but once the heat shield is discarded and parachutes deployed, the landing craft is supposed to fire it’s rocket engines, hover above the ground, open it’s cargo bay door and lower the rover down on a rope. After the rover is deployed, the hover will fly away and crash away from the rover.
Space.com
