Variable Union
The handler is designated for combination of two and more sets of variables into one set.
If names of the variables from different sets coincide, names of such variables in the output data set will be supplemented by unique numbers. If the variable name ends with a digit, in this case, names of these variables are numbered in an ascending order in the output data set.
Ports
Input
Input variables: the optional set of variables.
Added variables: the required set of variables.
Add another port enables to create new input ports for the subsequent sets of variables.
Output
Output variables: the new set of variables.
There are three sets of variables:
- Set A:
| Name | Caption | Value |
|---|---|---|
| a0 | a | 10 |
| b | b | 12 |
- Set B:
| Name | Caption | Value |
|---|---|---|
| a0 | a | 20 |
| c | c | 18 |
- Set C:
| Name | Caption | Value |
|---|---|---|
| a1 | a | 30 |
| b | b | 25 |
It is required to provide serial connection to the node. We will receive the following list of variables at the output (the "Note" column is provided for clarity; it won't be included into the resulting set):
| Name | Caption | Value | Note |
|---|---|---|---|
| a0 | a | 10 | from set A, variable a0 |
| b | b | 12 | from set A, variable b |
| a1 | a | 20 | from set B, variable a0 |
| c | c | 18 | from set B, variable c |
| a2 | a | 30 | from set C, variable a1 |
| b_1 | b | 25 | from set C, variable b |
Obviously, the second variable b was renamed to b_1, whereas the second variable a0 was renamed to a1, and a1 was renamed to a2 because after renaming of a0 to a1, it had already been a double.