Set Reference: Difference between revisions

|image=Set Reference number.png

Like [[Set Variable]], but with an additional input for the variable to store the value in. This enables you to store a variable in a [[List Element]] by connecting it to the Variable port, or make custom [[Script Block|script block]]s that modify variables.  

{{Image|Set_Reference_example1.png|Setting a variable value with Set Reference.}}

You can find an example of making lists in the [[List Element]] page. This page will focus on another use.

We will recreate the [[Increase Number]] block (by using a script block):

{{Image|Set_Reference_example2_increment1.png|One input port, which is added by 1.}}

This script block takes a variable, either by [[Get Variable]] or List Element. We have the increased number, now we have to set that value to the input variable, but how?

Set Variable cannot work in this case as it can only modify the variable as deemed by the user for the entire duration. And worse, it is by default [[Set Variable#Global_variables | local]] and so the variable we would like to increment remains unchanged. Other variable modes are impractical as well.

Therefore, we will have to use a more versatile script block. Set Reference allows to modify the variable on the left-hand side as named by the user:

{{Image|Set_Reference_example2_increment2.png|The final script.}}