This does what you'd expect ...
string[] foo = { "bar", "baz", "quux" };
.... so why is this a syntax error?
private string[] foo()
{
return { "bar", "baz", "quux" };
}
I know that it works with 'new string[]' inserted, but I don't understand
why assignment and 'return' disagree on what is a valid rvalue.
P.
-- www.CL4.org 1 4468
Paul E Collins <fi************ ******@CL4.org> wrote: This does what you'd expect ...
string[] foo = { "bar", "baz", "quux" };
... so why is this a syntax error?
private string[] foo() { return { "bar", "baz", "quux" }; }
I know that it works with 'new string[]' inserted, but I don't understand why assignment and 'return' disagree on what is a valid rvalue.
It's not a normal expression - it's an array initializer, which may
only be specified in field declarations, local variable declarations
and array creation expressions.
I believe this is because all of those three know exactly what type
they should be constructing beforehand, whereas for general expressions
the type of the expression is not dependent on context.
I dare say it would have been possible to include this "exception" in
other places (such as return statements), but I suspect it would have
made the specification messier. Of course, they're not really *needed*
anywhere...
--
Jon Skeet - <sk***@pobox.co m> http://www.pobox.com/~skeet
If replying to the group, please do not mail me too This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
by: Carlos Ribeiro |
last post by:
I thought about this problem over the weekend, after long hours of
hacking some metaclasses to allow me to express some real case data
structures as Python classes. I think that this is something with
potential to be useful, but I would like to hear more opinions first.
If this is deemed to be useful, I *may* try to write a PEP for it.
This is not a promise or even a proposal, at this point.
Broadly generalizing, classes in Python have...
|
by: anonymous |
last post by:
I believe I ran into an interesting way to create memory leaks in C# 2.0
using anymous delegates. Here is a sample of the code in question.
private void Handle_Event(object sender, EventArgs e)
{
Timer timer = new Timer();
timer.Interval = 10000;
NotifyForm notifyForm = new notifyForm();
notifyForm.Show();
timer.Tick += delegate(object timerSender, EventArgs tArgs)
|
by: Anders Thomsen |
last post by:
Hi,
Is it possible on VB.NET to create anonymous arrays, e.g. passing
arrays directly as a method-parameter instead of reference it from a
variable.
In C#, I can do this:
string s = "Blah blah, Aloha!";
string sArr = s.Split(new String{","});
|
by: prakashspatil |
last post by:
can any body clear the concept of anonymous arrays .
|
by: =?Utf-8?B?U2VyZ2V5IFBvYmVyZXpvdnNraXk=?= |
last post by:
Hi,
I need to initialize my class level dictionary (in .Net 2.0). I wanted to
make it inline and employ anonymous methods as I do not use this code for
anything else. Something similar to the following:
private static Dictionary<string, field_fields = delegate()
{
Dictionary<string, fieldresult = new Dictionary<string, field>();
result.Add("Application", new field("Application", "AppName"));
| |
by: Frankie |
last post by:
I have just gotten up to speed on what anonymous methods are (syntax,
capabilities, etc), and how they can be used with /called via delegates.
What I am wondering is...
1. Are they only/mostly syntactic sugar (important as that can be)?
2. Are anonymous methods *required* anywhere? That is, are anonymous methods
the only way to accomplish certain tasks in
..NET programming?
|
by: Peter Duniho |
last post by:
On Mon, 01 Sep 2008 16:14:10 -0700, Blip <blip@krumpli.comwrote:
Briefly, an anonymous method is exactly that: a method without a name.
When you use the "delegate" keyword to declare an anonymous method, all
you're doing is writing a method the same as you would anywhere else,
except that it doesn't have a name, and so you have to use it right away
rather than being able to refer to it elsewhere. (And I mean that only in
the static,...
|
by: andreyvul |
last post by:
I'm trying to do the following:
typedef struct {
char *bar;
char **baz;
} foo;
const foo fop = {
{ "foo", { "bar", "baz", "bax" } },
{ "goo", { "car", "cdr", "cfr" } }
|
by: shapper |
last post by:
Hello,
On my web site I have a property, Visitor, which is available for
Anonymous users:
public class Visitor {
public CultureInfo Culture { get; set; }
public List<GuidPolls { get; set; }
}
|
by: Luna Moon |
last post by:
I am reading the book "C++ Annotations", and here is a quote from the
book:
Namespaces can be defined without a name. Such a namespace is
anonymous and it restricts the
visibility of the defined entities to the source file in which the
anonymous namespace is defined.
Entities defined in the anonymous namespace are comparable to C’s
static functions and variables.
In C++ the static keyword can still be used, but its use is more
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
| |
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
|
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
|
by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
|
by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
|
by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
|
by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
| |
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
|
by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
| |