How to sum array of numbers in Ruby?

How to sum array of numbers in Ruby?

ruby arrays math sum

ruby

How to sum properties of the objects within an array in Ruby

ruby arrays object sum inject

ruby

ruby: sum corresponding members of two or more arrays

ruby arrays sum

ruby

Sum 2 hashes attributes with the same key

ruby hash attributes sum

ruby

sum(&:x) not working any more

ruby ruby-on-rails-4 sum

ruby