How to Use Logical Control in Karate

Now I have a problem. Assume that before I request the A interface, I need to request the B interface and decide whether it needs to request the A interface based on whether the value returned by the B interface is null. How do I do this in karate? I read the document do not know if eval can meet my needs？

like this

`

get B response

• eval if ( Bresponse == {} ) path ‘……’ path ‘……’ `

[nuanyang233]

I think I fell in love with karate

[ptrthomas]

@nngrjg ask this question on stack overflow please (and provide a simple clear example). I think all of this is answered for e.g. here: https://stackoverflow.com/a/69149219/143475