Can I do this in Ruby?

Currently I have the following 2 lines of code

errors.add_to_base I18n.t :error_message if value != 1
return false if !errors.blank?

Is it possible to condense t开发者_如何学运维his into 1 line of code? I need to do this in multiple places with different error message and condition. Also, "return false" is to stop the flow of an ActiveRecord lifecycle.

Hmm. If you know errors.blank? will be true unless the first condition fires then:

(errors.add_to_base I18n.t :error_message; return) if value != 1

Update: Aha, you are willing to define a method. How about a Proc object? It's better than a method here in that if the Proc block returns then the invocation will return from the surrounding method.

test = Proc.new do |cond, msg|
  errors.add_to_base I18n.t msg if cond
  return unless errors.blank?
end
# ...
test.call value != 1, :error_message

^{Note that you don't need to return false as a plain return will return nil and that will be good enough unless some sadist is doing something like f().class == NilClass. :-)}

You can take advantage of how the boolean logic operators work and do something like this:

value != 1 && errors.add_to_base I18n.t :error_message && return false

Not very clear, I wouldn't recommend using it. Also if errors.add_to_base returns something that's "falseish" the return false wouldn't happen.

Remember: "Always code as if the person who will maintain your code is a violent psychopath who knows where you live”