Question

With Ruby, how can I set a variable based on a condition? Something like:

dog_name = params[:dog][:name] if params[:dog]

And then dog_name just wouldn’t be set if params[:dog] wasn’t set.

Right now I’m getting an error if params[:dog] is nil.

Answer 1

You could use the && operator:

dog_name = params[:dog] && params[:dog][:name]

So now dog_name will be nil if params[:dog] does not exist, else it will be the value of params[:dog][:name].