Ruby

Symbol to proc

def adder(array)
  array.inject { |result, element| result + element }
end

array = [1,2,3,4,5,6]
puts adder(array)

def adder(array)
  array.inject(&:+)
end

array = [1,2,3,4,5,6]
puts adder(array)

def rounder(array)
  array.map { |element| element.round }
end

array = [1.23, 4.56, 7.89]
puts rounder(array)

def rounder(array)
  array.map(&:round)
end

array = [1.23, 4.56, 7.89]
puts rounder(array)

string = "Ruby is programming language"
puts string.split.map{ |element| element.length }.reduce { |result, element| result + element }

string = "Ruby is programming language"
puts string.split.map(&:length).reduce(&:+)