Dynamically select msg.payload key element

[hameljc]

I have looked around but found nothing that answer my situation.

I want to setup a global variable. The value of the variable will come from the msg.payload BUT, the element name (key) will be dynamically build like so:

global.set("ConnectServerUrl",msg.payload.ConnectServerUrl <-DEV,-TEST,-PROD>)

The -DEV or -TEST or -PROD is from another global variable name global.environment.

[Colin]

Welcoome to the forum @hameljc

Try something like

global.set("ConnectServerUrl",`${msg.payload.ConnectServerUrl} ${global.get("environment")}`)

That is assuming that the global variable is "environment" not global.environment. It would probably not be a good idea to have a global variable called global, that would surely be confusing.

The backtick syntax is called template literals, see JavaScript Template Literals

[hameljc]

@Colin

global.set("ConnectServerUrl",${msg.payload.ConnectServerUrl} ${global.get("environment")})

Thanks for your reply but the concatenation doesn't need to be with the value of msg.payload.ConnectServerUrl but rather to define/name the element/key ConnectServerUrl like so:
msg.payload.ConnectServerUrl-DEV
msg.payload.ConnectServerUrl-TEST
msg.payload.ConnectServerUrl-PROD

The -DEV or -TEST or -PROD will come from another global variable name environment.

I am looking for a way to dynamically set the name of the key in the msg.payload

[E1cid]

If i understand correctly, try

const key = "ConnectServerUrl-" + (global.get("environment") || "default");
global.set("ConnectServerUrl", msg.payload[key]);

[Colin]

If that isn't it then give us some examples of actual values in the globals and msg.payload and tell us what you want to happen.

[hameljc]

Thank you E1cid, exactly what I needed