public Method

Object.blank?

Source
Home > Ruby > Rails > Rails 2.0.2 > ActiveSupport EDGE > Object > blank?

An object is blank if it’s nil, empty, or a whitespace string. For example, "", " ", nil, [], and {} are blank.

This simplifies 

if !address.nil? && !address.empty?

to 

if !address.blank?

Source Code

# File active_support/core_ext/blank.rb, line 9
def blank?
  respond_to?(:empty?) ? empty? : !self
end
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