I'm a little bit confused, can somebody please explain the main difference between those types of containers:
map
list
set
array
thanks in advanca(I'm asking about C++)
In a service class there is a method to start the service. If that service gets done executing does it runs onstartcommand from the beginning? Is onstartcommand sorta like a loop as long as the service is running. For example i have
onstartcommand
{
int x = 0;
if(x == 0){
}
else{
}
}
After that is complete does it run it again. If you know that answer please explain. I have read google explanation of services and it did not explain that part very well. Is onstartcommand sorta like a loop as long as the service is runnning
I have set up my table with an index only on done_status(done_status =INT), when I use
EXPLAIN SELECT * FROM reminder WHERE done_status=2
i get this back
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE reminder ALL done_status NULL NULL NULL 5 Using where
but when I give this command
EXPLAIN SELECT * FROM reminder WHERE done_status=1
that's what I get back:
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE reminder ref done_status done_status 4 const 2
first time it shows me it uses 5 rows second time 2 rows
I don't think the index works, if I understood it right first time it should give me 3 rows. What do I do wrong?
SHOW INDEX FROM reminder:
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment
reminder 1 done_status 1 done_status A 5 NULL NULL BTREE
The performance of SQL Server is primarily decided by the disk I/O efficiency. Improving I/O definitely improves the performance. SQL Server 2008 introduced Data and Backup compression features to improve the disk I/O. Here, I will explain Data compression.
Data compression implies the reduction in the disk space reserved by data. Therefore, data compression can be [...]
This article will compare four important architecture presentation patterns i.e. MVP(SC),MVP(PV),PM,MVVM and MVC. Many developers are confused around what is the difference between these patterns and when should we use what. This article will first kick start with a background and explain different
This article will compare four important architecture presentation patterns i.e. MVP(SC),MVP(PV),PM,MVVM and MVC. Many developers are confused around what is the difference between these patterns and when should we use what. This article will first kick start with a background and explain different...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.
This article will compare four important architecture presentation patterns i.e. MVP(SC),MVP(PV),PM,MVVM and MVC. Many developers are confused around what is the difference between these patterns and when should we use what. This article will first kick start with a background and explain different...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.
This Tip Of The Day (TOTD) attempts to explain the basics of Interceptors 1.1 - a "new" specification introduced in the Java EE 6. Interceptors do what they say - they intercept on invocations and lifecycle events on an associated target class. The specification is not entirely new as the concept is borrowed from the EJB 3.0 specification.
I've had discussions with other programmers on interfaces (C#). I tried to use the analogy of interfaces being like a contract between programmers. Meaning that when you design to an interface, you are designing to a "thought out plan".
This didn't fly. The other programmers (limited experience) couldn't get the concept. Or worse, refused to participate.
How do you explain to people like that there are reasons to use interfaces?
Thanks
I'm try this script out
http://wiki.unity3d.com/index.php/Gravity
and I'm having some issues with it (it seemed to work when I tried it with an old version of unity)
the first issue is of collision, the objects (in my case spheres) will stick into each other rather than just touch.
and the second is that when the objects collide one of the objects with continue it's trajectory.
I'm thinking of rewriting the script from scratch unless someone can explain what's wrong with the script that i've got.
In my previous article I explained some of the nice features related to IDE, in continuation to that I am going to explain Add Reference enhancements for developers, Windows 7 support for developers, Share Point 2010 enhancements , Office Business Application Support, Cloud Development, Document Map Margin and Visual Studio 2010 Tips
Warning: LBA32 addressing assumed
when i read this and my server is rebooting, it wont boot again.
I have to boot from USB, repair bootloader and then its rebooting again, but after the next update of the Linux Kernel (i think that is it) i will read that again and blah blah.
Can anyone explain how to fix that permanently?
I usually use Grub, but when this error hits, he tries to boot with Lilo.
Greeetz and Thanks in advance!
When starting and stopping IIS 7 application pools from command line with appcmd.exe, you should be aware of a behavior that can sometimes lead to unintended circumstances. To explain it, lets first review what happens when you stop an application pool Read More......( read more ) Read More......(read more)
Quantum Computing is the next promising big thing to happen in computer science and its going to revolutionize the way we solve problem using computers. To explain the concepts of Quantum Computing to common man, Microsoft released a nice video which gives brief introduction to the concepts, explains the benefits and the work being carried out by Microsoft to make this technology research a reality.
Check out this embedded video and visit Microsoft’s website for more details on Quantum Computing.
In a previous blog post about Service Pack 4 , I said the following: "...from this point forward all you're likely to see are cumulative updates to the SP3 and SP4 branches and, roughly a year from today, mainstream support will only need to maintain the SP4 branch. You can read more about this in the following blog post from the CSS blog: Mainstream vs Extended Support and SQL Server 2005 SP4: Can someone explain all of this? " In that post, I focused on these words in the product lifecycle chart:...(read more)
In order for your website to rank well, your internal linking structure is critical to your success. This is covered some of the theory for this in various articles and blogs about Page Structure of a website, which said how you should map out the physical linking structure, but in this guide I will explain more about the importance of interlinking your pages, while using your targeted keyword in your anchor text.
Entity Framework has evolved in the light of feedback. ADO.NET Entity Framework 4 is now better able to accommodate different development methodologies. A welcome improvement is the way that, the application designer now has a range of options in the way that Entity Framework creates the Data Access layer. Prasanna returns to Simple-Talk to explain the significance of the changes.
In case you haven’t heard, JB Brown is going to be presenting online at the Team System User Group this Thursday. This month’s presentation will explain how Team Review (freely available) can be used with Team Foundation Server 2005, 2008 and even 2010! Meeting Date: Thursday, March 18th, 2010 Time: 5:00PM Pacific {Add to Calendar} {Join Meeting}