Values by copy vs. values by reference.....

Hi ,
Just a wonder ....!!!
Since passing values as reference are considered to be quicker method than passing values as copy between the host program to procedures , i wonder why the in out/out parameters are passed as copy and not as reference.....whereas the in parameters are passed as reference , at least in Oracle 8i .....
Thanks....
Sim

I think by default they passed as copiesNo , the in parameters are passed by reference... that's why if you try to pass a IN parameter as reference using the NOCOPY hint then an Oracle error is displayed....whereas the OUT / IN OUT parameters are passed by value ... and there is the capability to pass them as by reference using the NOCOPY hint....
Greetings....
Sim

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KE28 with" Copy Characteristic Value with Reference Data" doesn't work

Hi experts:
We need to make a top-down setting the processing option 'Copy Characteristic Value with Reference Data'. We have the following source data:
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6        #              100
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Customer Business Unit Value field.
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There are some restrictions on the XML Schema format that you can report off of in Crystal Reports.
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[http://resources.businessobjects.com/support/communitycs/TechnicalPapers/cr_xml_data_sources.pdf|http://resources.businessobjects.com/support/communitycs/TechnicalPapers/cr_xml_data_sources.pdf]
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Wanna send integer value by reference in function

I wanna send integer value by reference thro' function. Here's the code going.
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basic b = new basic();
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If you want to update the value in your b object, then you have to pass the reference of that object to test2.Function(..). Here is one way to do it:
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DLL interfacing with mixed value and reference types

I'm currently trying to work with a supplied DLL.
I have header files and all, and the DLL import wizard does a decent job of importing the DLL functions but there are some data types which simply can't be handled.
The DLL requires usage of a data type which is a struct with value and reference data types. I could theoretically replace the references with simple U32s but much of the required information in the data is in the data structures referenced by the pointers.
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Shane.
Say hello to my little friend.
RFC 2323 FHE-Compliant
Solved!
Go to Solution.

Hi Shane,
To be honest, I don't understand why you have to pass the ENTIRE structue (if it's "Item" structure. The pointer to the next and the previous item should be held and manituplated in the DLL, doesn't it?
Operate within classes....
Are you talking about Labview Classes? I didn't use it yet. Sorry.
Convert Linked List to Array You can't store all elements by value in a cluster, because it's kind of recursive. The next pointer leads to the same Item structure (with it's own next pointer. If it's a circulary-linked-list it will never stop)
Or did you mean to store the pointers as a U32 value? That should work.
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I'm honest again I can't see the important information you mentioned if you pass the Data structure as a binary blob.
Read-only is a very good idea. If you don't need to tweak the pointers in the list you should avoid it.
Balze

Problem extracting value from reference

Hi all,
I have a main VI where the user specifies a range for acquiring data. These values are then passed to a subVI which iterates a loop an according number of times. I have created a reference in the subVI which passes the position of the data acquisition in the range specified as I want to provide a progress bar which would be calculated as (max value - current value)/(maxvalue - minvalue).
I created an indicator to show the current value on the main VI which is related to the reference I created and when I run the main VI I can see this value changing correctly. The problem is that I cannot find a way to wire this value into the formula above. I tried changing the indicator to a control, but the value is not passed.
I have attached my code along with the subVIs to illustrate the problem. Current Frequency A increments correctly on the screen whereas Current Frequency B stays constant. I have also tried using local variables, property nodes and an OpenVIReference Node but none of these solve the problem.
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Attachments:
FRA SubVI.vi ‏71 KB
extract value from reference.vi ‏52 KB
DATA FROM RIG v2.vi ‏553 KB

No worries - I managed to solve my own problem.
I realised if I did the calculation and created the progress bar on the subVI and made the reference straight to that then it wouldn't required the need to bring a wire from the reference.
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How to implement a Copy or Create with Reference scenario

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Hi Dries-
There are no pre-packaged solutions with BADIs since they are, by definition, custom development. If that's the path you need to go down then consider the following high level alternatives:
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Another alternative is to develop the BADI as custom logic. Data Manager parameters can be picked up in Script Logic and the values can be sent to the BADI by adding parameters. Please see an example of parmater use in the "How To" document for Destination App at:
[EPM How To Guides|https://wiki.sdn.sap.com/wiki/display/BPX/Enterprise%20Performance%20Management%20%28EPM%29%20How-to%20Guides] > "How-to Desitnation App"
Regards,
Sheldon

Copy Sales Order with reference to a Contract

Hello,
how can I create a copy of a sales order referred to a contract mantaining the reference?
I have an order referred to a contract; I would like to create a new order in copy ( va01 - create with Reference) maintaining the relationship to the contract.
Thank to all,
Antonio

Hi,
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Note:Please search in the forum before posting basic questions.

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Assigned by value or reference?

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Thanks,
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That would create a separate copy.
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Varbinary(max) parameters in Nested Stored Procedures by value or reference _Expand / Collapse

Consider a situation where a stored procedure taking a varbinary(max) (BLOB) input parameter
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Is a copy of the BLOB provided to the nested stored procedure (passed by value) OR is the BLOB passed by reference.
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I don't know.
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Erland Sommarskog, SQL Server MVP, [email protected]

Can I use a cell value to reference a table on another sheet?

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On my first sheet I have a number of tables, each holding information on a service. Each table is named to match the service name.
On another sheet I have a list of clients that use these services, with the service name (to match the table name on the first sheet) in a cell in the client's row.
I would like to pull data from one of the cells on the Service table to include it in a concatenate formula in the clients row.
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Cheers

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How to change a value with reference if inside of a tabControl?

Hello,
i have a Vi with a tabcontrol and two pages. On each page is a string-control (string1 and string2).
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Attachments:
main.vi ‏7 KB
ref.vi ‏11 KB

Easiest way that I know is to right click on the control itself and select "Create->Reference".
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HashSet get() and contains() methods, by value or reference?

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<CODE>
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String s2 = "cat";
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set.add(s1);
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803559 wrote:
With Strings, it seems the get() and contains() methods work by value, not by reference.
String s1 = "dog";
String s2 = "cat";
String s3 = "dog";
System.out.println(set.contains(s1)); //true;
System.out.println(set.contains(s2)); //false
System.out.println(set.contains(s3)); //true
Is there any way I can get the set to select by value rather than reference for objects that aren't String?Warning: Never use the term "by reference" around Java geeks. It makes 'em go all green at the gills and they start muttering about 'bloody C++ crossovers'.
However, as DrClap pointed out, you've mis-diagnosed the problem:
System.out.println(s1 == s1);
System.out.println(s1 == s2);
System.out.println(s1 == s3));would print out the exact same results.
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Winston

Passing values by reference to a graph seems to be not working... help, I'm losing my mind! ;)

I'm bordering on psychosis now.
Grr..
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Here are the files:
Attachments:
dwcs_advanced.vi ‏350 KB
dwcs_-_sw_graph_load_&_save.vi ‏62 KB
flattp10.wfm ‏16 KB

Values by copy vs. values by reference.....

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