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I have been studying Java for a few months and am now starting to learn C.
I am a little confused, I was under the impression that passing an object by reference and passing a pointer to that object were the same thing: I thought the difference was that...
Started by Ziggy on
, 10 posts
by 10 people.
Answer Snippets (Read the full thread at stackoverflow):
If you are studying C (rather....
I m not sure about java but in C# or VB.net you can pass by value or by refrence
example passing.
References can not be calculated with Java and C pass by value (When passing.
Can calculate with.
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Are there benefits of passing by pointer over passing by reference in C++?
Lately, I have seen a number of examples that pass the a pointer instead of passing by reference. Are there benefits to doing this?
Example:
func(SPRITE *x);
with a call of
func...
Started by Matt Pascoe on
, 7 posts
by 7 people.
Answer Snippets (Read the full thread at stackoverflow):
If there's ever a chance that you could....
Pass by reference Caller just not.
This can be used to provide optional arguments.
Passing by pointer Caller has to take the address -> not transparent A 0 value can be provided to mean nothing .
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Possible Duplicate:
What’s the difference between a parameter passed by reference vs. passed by value?
I have difficulty understanding the difference between passing by value and passing by reference. Can someone provide a C# example illustrating the ...
Started by DakhilM on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
The basic idea is:
If the argument is passed for examples:
Simple example: passing an int by ref or by value
class Test { static void Main() { int i = 10 in PassByValueChangeParameter....
In general, read my article about parameter passing .
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Here is what I understand so far: PASS BY VALUE Passing by value means a copy of an argument is passed. Changes to that copy do not change the original.
PASS BY REFERENCE Passing by reference means a reference to the original is passed. changes to the...
Started by Goober on
, 8 posts
by 8 people.
Answer Snippets (Read the full thread at stackoverflow):
You can); // OK, foo assigned by SetOne AddTwo(ref bar); // error, bar is unassigned }
You pass by ref something you want to be read and written by ....
They both mean 'pass by reference'.
You would never combine ref and out on 1 parameter .
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Quick one; am I right in thinking that passing a string to a method 'as a CONST' involves more overhead than passing a string as a 'VAR'? The compiler will get Delphi to make a copy of the string and then pass the copy, if the string parameter is declared...
Started by robsoft on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
It avoids creating a copy (default, by value) or even passing a pointer (var, by reference(x2.x); end; var x: TFoo; begin Foo(x, x)....
Const is already the most efficient way of passing parameters to a function.
Bigger performance impact.
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Here's what I want to do:
Given a table
PeopleOutfit (id int primary key, boots int, hat int)
And a stored procedure
UpdateOutfit @id int, @newBoots int = null, @newHat = null
Is there a way to tell whether I called this procedure as
exec UpdateOutfit...
Started by Stanislav Kniazev on
, 6 posts
by 6 people.
Answer Snippets (Read the full thread at stackoverflow):
If the default is null , then maybe you could pass in 0 as the value for @newBoots
Strictly, no, there's no real facility.
Is to use a default value that you would never pass in as an argument.
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I have two questions, actually. But they are very closely related.
Suppose I have a simple struct like this:
public struct TradePrice { public float Price; public int Quantity; public TradePrice(float price, int quantity) { Price = price; Quantity = quantity...
Started by Dan on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
Passing structs instead of individual values may lead to better maintainability because if you ever.
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Here's a constructor for my Game class:
// Construct a Game to be played with player on a copy of the board b. Game(const Board& b, Player* player) { ... }
Here's how I'm using the constructor:
Player p("Player Name"); Board b(6,3); Game g(b, &p);
How...
Started by Elliot on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
Is....
Don't mix your style.
If you have some code later like style issues.
If you want to save a pointer, then yes are passing the board by reference , so no, it is not being copied.
If you pass by reference or pointer then no copy is made.
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Using c#, vs2008, winforms
If i am passing a parameter via a property to a child form from a parent form, or infact via a property to any class, and the the paramater im passing in C# is a reference type created in the parent form, does it get passed ...
Started by Spooky2010 on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
Read this....
C# does not pass by reference types anyways).
In the case of passing objects to a function, C# uses pass reference in Depth" is a great reference (no pun intended) on these matters.
As that of the object it was set to.
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What is the example of the OOP concept 'Message Passing' in C# (calling methods/Passing parameters/Firing Events/Handling Events/???) and why is it called message passing?
Started by JMSA on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
A major benefit....
It is called message passing to distinguish it from passing parameters.
It's called message passing to distinguish it from the imperative notion of "calling site, you just tell the receiver the "message".
Method calls.
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