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I've read conflicting opinions as to whether every BeginInvoke() has to be matched by an EndInvoke(). Are there any leaks or other problems associated with NOT calling EndInvoke()?
Started by endian on
, 7 posts
by 7 people.
Answer Snippets (Read the full thread at stackoverflow):
And EndInvoke call is not optional call/archive/2008/01/07/isynchronizeinvoke-now.aspx....
More info here
Delegate.EndInvoke is documented as a though shalt call a lot easier, and avoid the pain of IAsyncResult etc .
EndInvoke is not optional.
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Hi
I'm fairly new to php and I am trying to figure how do I set an optional parameter after the first optional parameter?
For example I have the following code:
function testParam($fruit, $veg='pota',$test='default test'){ echo '<br>$fruit = '.$...
Started by Joe on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
You can't do what you ....
Here is another question that should give you more information .
You have to pass in 0, or null , or some other value and then if the value is 0 or null , change it to the default value .
Unfortunately, you cannot do that in PHP.
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Is there a way in C# to mark a parameter as optional like VB.net's Optional keyword?
Started by Jack on
, 9 posts
by 9 people.
Answer Snippets (Read the full thread at stackoverflow):
Which could be called not to confuse what has been lacking support... .
I believe parameter given a default value is necessarily an optional arguement .
Type to pass as a param and have logic in the function to do that type of optional logic.
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Hi! I have a "format" method that works in a similar manner to the C# String.Format method, with the following signature:
In a class named StringTools:
/** * Formats a string, based on C# String.Format method. * @param raw A string with numbered tokens...
Started by Rhys Causey on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
You could also....
I'm not sure why null is necessary, but it works fine this way .
It should work fine using the argument collection method described, as long as the first element in the arguments array is null .
Actually, just found that it's my problem.
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How do I use optional parameters in Java? What specification supports optional parameters?
Started by Mike Pone on
, 6 posts
by 6 people.
Answer Snippets (Read the full thread at stackoverflow):
Another option....
What you can do is overloading the functions been mentioned .
If you want a variable to be optional, you can overload the method using(defaultOptionalFlagValue); }
There are no optional parameters in Java.
Must be supplied.
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How can I create a method that has optional parameters in it in Visual Basic?
Started by Steve Duitsman on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
All parameters....
Sub MyMethod(ByVal Param1 As String, Optional)
Keep in mind....
Optional parameters must be the last parameters defined, to avoid creating ambiguous functions.
Just use the optional keyword and supply a default value.
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Is C# 4 optional parameter implementation the same as VB.NET, the optional parameter is compiled on the call site(can cause versioning problems)?
Started by Hao on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
However, optional parameters should.
Yes, it would cause versioning problems.
Parameters in C++.
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As I understand it, the white dot indicates "optional" while the black dot means "required".
If so, a Category is required while a Classified is optional.
But what does that actually mean in the database - to say that a Category is required and a Classified...
Started by eggdrop on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
If the child of the relationship (in the example above set as "classified"), is optional.
It means there.
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Let's say we have the following method declaration:
Public Function MyMethod(ByVal param1 As Integer, _ Optional ByVal param2 As Integer = 0, _ Optional ByVal param3 As Integer = 1) As Integer Return param1 + param2 + param3 End Function
How does VB.NET...
Started by John Rudy on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
(However, my primary to specify the parameters, even if they were optional -- to me, the code looks cleaner and is easier the visible signature -- it's only after....
Contrary to popular belief, optional parameters do appear to be CLS-compliant.
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I noticed methods marked optional in several protocols defined in the iPhone SDK, such as the UIActionSheetDelegate protocol for example.
How can I define a protocol of my own, and set a few of the methods as optional?
Started by jpm on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
@end
From the Apple page on "....
Simple as that!
// myProtocol.h @protocol myProtocol - (void)myMandatoryMethod:(id)someArgument; @optional - (void; //...
Use the @optional keyword before your method declaration to make it optional.
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