check if a interpolated method call is undefined

Question

I have an interpolated method call, send("#{k}_track", k, v). I would like to run a check to see if the method that is being called is defined or not.

Something along the lines of next if send("#{k}_track", k, v) == undefined. The method that is being called is just a standalone method in a service.

I've tried using try or method_defined? but not luck. They just return the same undefined method error. So i'm not sure if this is even possible.

Answer 1

Use Object#respond_to?:

send("#{k}_track", k, v) if respond_to?("#{k}_track")

Or in the case with next:

next unless respond_to?("#{k}_track")
send("#{k}_track", k, v)