inject_example.rb

# Classic approach
def check_for_truth
  has_at_least_one_true = false  # ewwww temp var

  [false, false, true].each do |option|
    has_at_least_one_true = option
  end
  
  has_at_least_one_true
end

# Rubysh approach
def check_for_truth
  [false, false, true].inject(false) {|answer, option| answer || option }
end

# http://ruby-doc.org/core/classes/Enumerable.html#M003129
# http://blog.jayfields.com/2008/03/ruby-inject.html