Question

I want to pass a symbol into a method and have it

def block
  @something = Something.find(1)
  hsh = {:type => :method_to_perform}
  hsh.each { |k, v| nil_test k, v }
end

def nil_test k, v
  @something.try(:k) ? (@k = @something.k.v) : nil
end

I’m running into one or maybe two issues, first I think passing the symbol isn’t acting as a method on @something. How do you pass a symbol and have it act as a method into another block?

Second, I want the key to become the symbol, in others words in the above example I want @k to be @type, not @k. Know how to solve this problem?

Answer 1

You need to use send (or public_send):

@something.try(k) ? instance_variable_set(:@k, @something.send(k).send(v)) : nil

You might as well just do

instance_variable_set(:@k, @something.try(k).try(v))

which is equivalent.