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Which is the best iterator:
1. For loop
2. For each
3. IEnumerator
Regards
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blumenhause wrote: Which is the best iterator
What is it being used for?
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Does the performance depend on what it is being used for, because I saw some articles here informing that IEnumerator is the slowest. I wanted to know which one is fastest so that I can implement that method here on in my coding(C#).
Regards,
Blumen
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There's a real difference between working which is slowest, and any of them being *slow* in the real world. If IEnumerator is slowest ( and I thought it probably would be ), then choose from the other two, which, as I said, are the same thing. But, don't avoid IEnumerator. Write some code and see if you can spot a speed difference 
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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I couldn't spot any difference.
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foreach is just a for loop, the compiler inserts the for loop in place of your code. I don't see how any of them are going to have any significant differences.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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I just wanted to know which of those are faster so that I can implement in my coding.
Regards,
Blumen
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Like I said, I doubt any of them are. foreach and a for loop are the *same* thing. Choose based on what suits your needs at the time, speed is never going to be an issue between them
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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Christian Graus wrote: foreach is just a for loop, the compiler inserts the for loop in place of your code
You are wrong here. foreach only works on IEnumerable and is using an IEnumerator internally.
Robert
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Really ? OK. I knew it was just syntactic sugar, but apparently I got the details wrong. Thanks for the heads up.
Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )
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For You :
For Loop is the best option
Develop2Program & Program2Develop
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How on earth could you possibly say that without knowing anything about the situation it's going to be used in or what the requirements are?
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the assumption that the OP is a clueless noob because he posted without answering any of your questions. 
--
You have to explain to them [VB coders] what you mean by "typed". their first response is likely to be something like, "Of course my code is typed. Do you think i magically project it onto the screen with the power of my mind?" --- John Simmons / outlaw programmer
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The best iterator is the one that gives the most readable code in the context it is used in.
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Nice answer. 
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There is no best iterator.
That's why there is more than one, it all depends on the circumstances
(or your definition of best: performance, readability, susceptibility to
mistakes, ...).
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They are all about the same when using smaller data sets. The only time you will notice differences in speed between the iterators is when you use large data sets. By large data sets I mean in the 100,000 plus data records range. But there are other factors involved here as well such as the operations being done between the iterations.
For best optimization look at the operations being done between the iterations and I'm guessing you will gain more speed over changing your iterator.
Phil
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How can I detect whether a certain field retrieved from the database contains an image or other type of blob?
I have a MSAccess table with an OLE-Object field holding a bitmap. This field is added to the DataTable as an System.Byte[] type. How do I know whether this field actually holds an bitmap?
Thanks for any help you can give.
Regards,
Kees Vermeulen
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The only way you can get this info is by inspecting the data in the field. You can either extract it and try to load it into an image or you can read the header bytes to see if they conform to known types.
Deja View - the feeling that you've seen this post before.
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I am using .NET 3.9 in VS 2005. If I double-click on control to create a click event, nothing happens. There is also no event tab in the properties window.
Does anyone have an idea on what could cause this / what the cure is ?
Johan Lombaard
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former - Albert Einstein
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Oops, .NET 3.0
Johan Lombaard
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former - Albert Einstein
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You need to define the event with the associated event handler in XAML markup. VS 2005 (with WPF) wont automatically create an default event handler when you double click a control.
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