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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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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....
They both mean 'pass by reference'.
Some parameter scenarios might be:
ref int numYou would never combine ref and out on 1 parameter.
Understand the dynamics of passing either way.
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Ask your Facebook Friends
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I have actions in different controllers that need to check for a some condition before execution. If the condition is not met, I want the user be redirected to another page with instructions on what to do next (the instructions will include a link that...
Started by xraminx on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
As John and Andrew mentioned I simply have to pass the data via I am, I fill in the ViewData dictionary and pass it to the RequirementsPage.aspx like this:
public)) { // redirect to another page that says....
I think I was getting it wrong.
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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):
You could, however....
If the default is null , then maybe you could pass in 0 as the value for @newBoots
Strictly, no, there's no real facility to accomplish this.
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 describes what it represents? Does it represent some clear concept in your business domain?
Problem #5.
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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):
As it was mentioned parameter....
If you want to save a pointer, then yes.
If you have some code later likeIf you pass by reference or pointer then no copy is made.
Are passing the board by reference , so no, it is not being copied.
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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):
It's called message passing to distinguish it from the imperative notion of "calling site, you just tell the receiver the....
We use the termMethod calls.
There are some who feel that message passing and method calls are different.
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Hi All,
Can anyone help me out understanding the various parameter passing modes in Scheme? I know Scheme implements parameter passing by value. But how about other modes?
Is there any good documentation for parameter passing in Scheme?
Answer Snippets (Read the full thread at stackoverflow):
Instead, some Scheme implementations like PLT with (unbox <some-box>....
If you're looking for a way to pass values "by reference" -- then one option that can sort of make it is to use macros, but you really shouldn't go there.
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