ADELIA |
VADELIA |
SADELIA |
WADELIA |
EADELIA |
(I/B) |
(I/B) (C/S) |
(B) (S) |
(I/B) (C/S) |
(B) (C/S) |
Warning: In the case of ADELIA programs, this instruction is not compatible with C generator, and cannot be used on an index.
Section for use
All
Syntax
READ_NX_ELT ListName
READ_NX_ELT IndexName
Description
When this instruction applies to an index, it reads the following element in the list ListName and assigns the values to its variables.
After running this instruction, the current item is the read item.
Below are the possible values:
Value |
|
*NOT_FOUND |
The read did not find the item (empty list). |
*NORMAL |
The read was successful. |
*INVALID_OP |
The index is not yet created or has been destroyed. |
Example
* Reads the first element of the list AGREEMENT_LST,
* and then, next elements up to the end.
READ_F_ELT AGREEMENT_LST
DO_WHILE &CODE_LST(AGREEMENT_LST) = *NORMAL
...
READ_NX_ELT AGREEMENT_LST
REDO
* Read index
LIST MyList Field1 Field2
LIST_INDEX MyIndex MyList Field1
*/ The list contains 4 items with the following values for Field1: 10, 2, 5 and 7
Field1 = 4
READ_F_ELT MyIndex
* Reads the list item with Field1 equal to 5
READ_NX_ELT MyIndex
*Reads the list item with Field1 equal to 7