String operations

[opus (Jürgen Baginski)]

Is it possible to do string manipulations within a rule?
I need to build a string out of elements of a String-ArrayList seperated by “,”.

[lipp_markus]

the quick answer is yes
As I am just happen to look at some of this, you may want to check out this post where group names are reconstructed in a rule:

Design Pattern: Working with Groups in Rules

Edit: Updates for OH 4, inclusion of JS Scripting and Blockly examples, removed the doors example as it’s superfluous. Please see Design Pattern: What is a Design Pattern and How Do I Use Them for how to read and use DPs. Problem Statement One powerful way to consolidate code in rules is to use array/list manipulation operations on the members of a Group. For example, filter down to just those members that are ON, get a list of the labels of those Items that are NULL, etc. Concept [image] T…

and this post here:

Configurable scenarios

For who want to have ability to adjust configuration of scenarios in “runtime”, from the app, here you will find a working example of it. This is a stand-alone example, you have obviously to modify something to integrate it in your system. First of all, light items, for example lights.items. // LIGHTS ITEMS & GROUPS Group gLights Switch Room1_Light01 "Light 01" (gLights) Dimmer Room2_Light02 "Light 02" (gLights) Switch Room3_Light03 "Light 03 RGB" (gLights) Color Room…

where configurations are saved in a string file

[opus (Jürgen Baginski)]

Thanks for the input, I didn’t know that StringBuilder was possible.