Difference B/W Pass By Reference & Pass By Value (Miracle Solved & Explained For all Languages)

Functions are created in all languages and perform various tasks uniquely. 

That's the reason why functions are useful in a coding of all types Languages.

Creating a Function needs to be needs needs 3 Basic Steps :

1. Defining and Creating the Defination of Function.

2.Calling the Function.

3. Passing the Paraments and Arguments into the function so that it provide output.

Now, 

as navision is using C/AL Language in its heart to define and work the logics.There is only one thing common is Function.

Calling the Function and creating the Function and Defining the Function.

Due to this Fact , understanding Functions is very much necessary for beginners and experts of NAV TECHNICAL Consultants.

Functions are easy to create in NAV. Now passing the parameters and calling the functions is explained below.

There are two functions which I had created and Called it via 

CALL BY REFERENCE & CALL BY VALUE.

By Default All Variables in Functions inside NAV Dev are Pass by Value which means a copy is created for parameter and passed.

Variables Used:

CustRec     Record    18

Old Name   Text 50
New Name  Text 50

ChangeCustomerName and ChangeCustomerNameRef are two functions Created in which
Customer variable is taken First one is Pass By Value and Second one is Pass By Reference.

The Code is As Follows :

(This code is only for study purpose taken as Example.If any Objections then Kindly mail)

The Final Result is as under screenshot.

Result 1:-

Result 2:

How to : Use & Implement TRANSFERFIELDS Function in NAVISION?

TRANSFERFIELDS

This function is basically used to copy data from one table to another. According to Microsoft on MSDN The following screen shows the same.

For the Example here I had copied the fields from Customer Table 18 and I copied the respective fields in Navision Dev Environment.

I had written the following Code for copying DATA. I had also remove all the code from the table field which I had copied.

This is the code which I had written for the exaple purpose.

After running the codeunit I got the desired result. I had not got the real example anywhere to use TRANSFERFIELDS.

Thats why I had written the following Blog. 

If there is any suggestion then please comment on below.