C# 4.0
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So now that C# 4.0 is being talked about, I was wondering what people thought would be good additions to the language. Sorry if this is a repost, but I went through several pages, and didn't see anything, so... What I'd frankly love to see would be tuples. Rather than having to use multiple 'out' parameters, you'd just return multiple values:
public int,int MinMax(int[] numbers)
{
int min, max;
// Code to calculate min/maxreturn min, max;
}What do you think? What would be good for the next version?
Kyosa Jamie Nordmeyer - Taekwondo Yi (2nd) Dan Portland, Oregon, USA
do anybody suggest me any gud article on 4.0 And what is the raod map of 4.0
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1. one of main differences between high-level languages and assembly language is that they introduces many ways to limit the programmer 2.
constkeyword is not only a limitation it is also a reminder for you and for others that there is a reason why something should not be changed. Andconstis certainly a better solution than running around the office saying 'promise me that you will not try to change data returned bySomeLongAndCrypticFunctionName'Mladen Jankovic wrote:
And const is certainly a better solution than running around the office saying 'promise me that you will not try to change data returned by SomeLongAndCrypticFunctionName'
Yes, but running is good for you! :laugh:
To hell with circumstances; I create opportunities.
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I'd love to see a const keyword on parameters to methods, and optional parameters. Both of which seem simple enough.
Christian Graus No longer a Microsoft MVP, but still happy to answer your questions.
I am astounded they don't support const parameters yet. Naturally, if they support const parameters, they will almost certainly have to support const methods. I think const parameters are one of the best things about C++ that got dropped out in C#.
Cheers, Vıkram.
"You idiot British surprise me that your generators which grew up after Mid 50s had no brain at all." - Adnan Siddiqi.
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Christian Graus wrote:
const keyword on parameters to methods
But how would the compiler verify the "constness" of methods that you call on a const object? The methods themselves would have to be declared const, just like in C++. Everything, including the BCL, will need to change for that. There's also the versioning problem. In C++, if a library changes, you are forced to recompile with the modified header files. There's no such need in .NET, so if a method declared const in v1 of the library became non const in v2, the "constness" guarantee will get broken (unless there is a runtime check).
Regards Senthil [MVP - Visual C#] _____________________________ My Home Page |My Blog | My Articles | My Flickr | WinMacro
S. Senthil Kumar wrote:
The methods themselves would have to be declared const, just like in C++.
Yeah, I wrote that myself, without reading your post. :doh:
S. Senthil Kumar wrote:
if a method declared const in v1 of the library became non const in v2, the "constness" guarantee will get broken (unless there is a runtime check).
I'm not sure I understand, could you please explain?
Cheers, Vıkram.
"You idiot British surprise me that your generators which grew up after Mid 50s had no brain at all." - Adnan Siddiqi.
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So now that C# 4.0 is being talked about, I was wondering what people thought would be good additions to the language. Sorry if this is a repost, but I went through several pages, and didn't see anything, so... What I'd frankly love to see would be tuples. Rather than having to use multiple 'out' parameters, you'd just return multiple values:
public int,int MinMax(int[] numbers)
{
int min, max;
// Code to calculate min/maxreturn min, max;
}What do you think? What would be good for the next version?
Kyosa Jamie Nordmeyer - Taekwondo Yi (2nd) Dan Portland, Oregon, USA
I'd like to have local static varibles.
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So now that C# 4.0 is being talked about, I was wondering what people thought would be good additions to the language. Sorry if this is a repost, but I went through several pages, and didn't see anything, so... What I'd frankly love to see would be tuples. Rather than having to use multiple 'out' parameters, you'd just return multiple values:
public int,int MinMax(int[] numbers)
{
int min, max;
// Code to calculate min/maxreturn min, max;
}What do you think? What would be good for the next version?
Kyosa Jamie Nordmeyer - Taekwondo Yi (2nd) Dan Portland, Oregon, USA
How about the ability to partially set array values. For example, for an int array of length 10 with default values of 0..9 respectively, the following would be valid:
myArray[3..5] = (-3, -4, -5);
The contents would then be: 0, 1, 2, -3, -4, -5, 6, 7, 8, 9 Another idea is a composite Label (say Strings and Images). The display of CompositeLabel.Text would display a String followed by an Image then we could have things (using my mythical System.Text.SmileyFace namespace) like . . .
myCompositeLabel.Text = "Hello, World " + System.Text.SmileyFace.BigGrin.ToImage();
The display would then be: Hello, World :-D Anthony
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So now that C# 4.0 is being talked about, I was wondering what people thought would be good additions to the language. Sorry if this is a repost, but I went through several pages, and didn't see anything, so... What I'd frankly love to see would be tuples. Rather than having to use multiple 'out' parameters, you'd just return multiple values:
public int,int MinMax(int[] numbers)
{
int min, max;
// Code to calculate min/maxreturn min, max;
}What do you think? What would be good for the next version?
Kyosa Jamie Nordmeyer - Taekwondo Yi (2nd) Dan Portland, Oregon, USA
I bet 99% of you disagree with this one! I would like to see multiple inheritance and full operator overloading available in C#.
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So now that C# 4.0 is being talked about, I was wondering what people thought would be good additions to the language. Sorry if this is a repost, but I went through several pages, and didn't see anything, so... What I'd frankly love to see would be tuples. Rather than having to use multiple 'out' parameters, you'd just return multiple values:
public int,int MinMax(int[] numbers)
{
int min, max;
// Code to calculate min/maxreturn min, max;
}What do you think? What would be good for the next version?
Kyosa Jamie Nordmeyer - Taekwondo Yi (2nd) Dan Portland, Oregon, USA
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I'd love to see a const keyword on parameters to methods, and optional parameters. Both of which seem simple enough.
Christian Graus No longer a Microsoft MVP, but still happy to answer your questions.
The good answer to 'constness' is spec#. The 'constness', the 'nonnullness', the 'checkedexceptionness' , the 'immutabilityness' etc ... are all describable with contracts. I think Spec# will be a real revolution in the .NET world. In fact the .NET infrastructure should evolve to include contract metadata so that every .NET language will manage contracts in a similar way. Try it here http://research.microsoft.com/SpecSharp/[^] ... and cry because I am sure that c#4 won't include spec# :-(
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So now that C# 4.0 is being talked about, I was wondering what people thought would be good additions to the language. Sorry if this is a repost, but I went through several pages, and didn't see anything, so... What I'd frankly love to see would be tuples. Rather than having to use multiple 'out' parameters, you'd just return multiple values:
public int,int MinMax(int[] numbers)
{
int min, max;
// Code to calculate min/maxreturn min, max;
}What do you think? What would be good for the next version?
Kyosa Jamie Nordmeyer - Taekwondo Yi (2nd) Dan Portland, Oregon, USA
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So now that C# 4.0 is being talked about, I was wondering what people thought would be good additions to the language. Sorry if this is a repost, but I went through several pages, and didn't see anything, so... What I'd frankly love to see would be tuples. Rather than having to use multiple 'out' parameters, you'd just return multiple values:
public int,int MinMax(int[] numbers)
{
int min, max;
// Code to calculate min/maxreturn min, max;
}What do you think? What would be good for the next version?
Kyosa Jamie Nordmeyer - Taekwondo Yi (2nd) Dan Portland, Oregon, USA
an IMaths interface so writing maths libraries with generics is simpler
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Because if you're providing an interface, you provide a contract with the people who use that interface. If I write a library, I can use const to tell a user when they can trust my code not to change their stuff.
Christian Graus No longer a Microsoft MVP, but still happy to answer your questions.
Christian Graus wrote:
I can use const to tell a user when they can trust my code not to change their stuff.
erm, I don't see how that would work. I thought that const was more of a promise to yourself, or to implementors, not to users. Nothing prevents you from calling methods and setting fields, right? Ok, let me start it again. What is the const keyword supposed to do in parameters that has an effect outside the method?
"Computer Science is no more about computers than astronomy is about telescopes." - Edsger Dijkstra
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I saw someone comment on that on another forum. Basically, you'd have something like this (using his sample syntax):
int? x = Company?.Person["Bob"]?.Age;
If Company or Company.Person["Bob"] were null, then x would be set to null, rather than getting an exception. I likes.
Kyosa Jamie Nordmeyer - Taekwondo Yi (2nd) Dan Portland, Oregon, USA
That's the best and most practical suggestion for c# I've seen. has anybody raised it to MS?
Smokie, this is not 'Nam. This is bowling. There are rules. www.geticeberg.com
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So now that C# 4.0 is being talked about, I was wondering what people thought would be good additions to the language. Sorry if this is a repost, but I went through several pages, and didn't see anything, so... What I'd frankly love to see would be tuples. Rather than having to use multiple 'out' parameters, you'd just return multiple values:
public int,int MinMax(int[] numbers)
{
int min, max;
// Code to calculate min/maxreturn min, max;
}What do you think? What would be good for the next version?
Kyosa Jamie Nordmeyer - Taekwondo Yi (2nd) Dan Portland, Oregon, USA
I do sort of like the idea but isn't a function by definition a thing that only returns a single value? Maybe we need anonymous returns instead so that you define a struct on the fly, thus returning a single entity that contains the multiple values. public {Max int, Min int} MinMax(int[] numbers) { int min, max; // Code to calculate min/max return {min, max}; } called with var v= MinMax(myArray); system.out.println(v.Min); system.out.println(v.Max); otherwise you'd end up having to create something wierd like this to get the values back int min, max = MinMax(myArray); Russell
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The Powers Collection or a simple hand rolled generic handles tuples, Pair<int, int> I have always said that developers need to focus on mastering what has been provided in 2.0 before even thinking about adding more candy.
Need software developed? Offering C# development all over the United States, ERL GLOBAL, Inc is the only call you will have to make.
Happiness in intelligent people is the rarest thing I know. -- Ernest Hemingway
Most of this sig is for Google, not ego.Hallelujah!
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Yeah, the C# team explicitly stated they always try to make the language simple rather than powerful. Which is retarded IMO. Sure, you can make mistakes with powerful features, but that's not the point.
Christian Graus No longer a Microsoft MVP, but still happy to answer your questions.
Christian Graus wrote:
they always try to make the language simple
Indeed, C# is a simple language, and was build exactly with this in mind. To be simple. Why now we just ask for features which belongs to higher level languages? Let it simple. For complex things, use C/C++. For critical and low level, use assembler. For functional use F#. And so on. Is it like we ask for VB to have some super features, which were never supposed to be in a programming language addressing the "features" VB address...
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So now that C# 4.0 is being talked about, I was wondering what people thought would be good additions to the language. Sorry if this is a repost, but I went through several pages, and didn't see anything, so... What I'd frankly love to see would be tuples. Rather than having to use multiple 'out' parameters, you'd just return multiple values:
public int,int MinMax(int[] numbers)
{
int min, max;
// Code to calculate min/maxreturn min, max;
}What do you think? What would be good for the next version?
Kyosa Jamie Nordmeyer - Taekwondo Yi (2nd) Dan Portland, Oregon, USA
As I posted before, I agree with Ennis Ray Lynch, Jr. that programmers should first learn all features of .Net 2.0 before jumping on new and shiny stuff. I would personally like to see static interfaces and inheritance from multiple classes.
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So now that C# 4.0 is being talked about, I was wondering what people thought would be good additions to the language. Sorry if this is a repost, but I went through several pages, and didn't see anything, so... What I'd frankly love to see would be tuples. Rather than having to use multiple 'out' parameters, you'd just return multiple values:
public int,int MinMax(int[] numbers)
{
int min, max;
// Code to calculate min/maxreturn min, max;
}What do you think? What would be good for the next version?
Kyosa Jamie Nordmeyer - Taekwondo Yi (2nd) Dan Portland, Oregon, USA
Well, I'll be satisfied if C# will become sometime, in the future, as good as Java already is today... ;P
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Actually, foreach is needed. Without foreach, you can't guarantee that the Enumerable pattern is followed. You don't expect developers to consistently follow the pattern using a for or while loop.
Sunny Ahuwanya "The beauty of the desert is that it hides a well somewhere" -- Antoine de Saint Exupéry
Surely without foreach you'd just be in the same position as Java was (pre v1.5?) where you have to make a call to getIterator() and then loop through that. It's much more unfriendly than foreach but it still does the same thing Russ
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I saw someone comment on that on another forum. Basically, you'd have something like this (using his sample syntax):
int? x = Company?.Person["Bob"]?.Age;
If Company or Company.Person["Bob"] were null, then x would be set to null, rather than getting an exception. I likes.
Kyosa Jamie Nordmeyer - Taekwondo Yi (2nd) Dan Portland, Oregon, USA
hm.. sexy!