people = %w(chezou kk_Ataka xmisao)
block = Proc.new { |name| puts name  }

people.each &block

people.each { |name| puts name }

p1 = Proc.new { |val| val.upcase }
p2 = :upcase.to_proc

puts p1.call('hi')
puts p2.call('hi')

:upcase.to_proc

people.map{ |person|  person.upcase }

people.map(&:upcase)

["1", "2", "30"].map(&:to_i)

["1", "2", "30"].map(&:to_i).reduce(&:+)

people.map { |person|  person.upcase }.each

people.each do |person|
  someone = 'block local'
end

someone

people2 = []
people.each do |person|
  people2 << person
end

p people2