Ruby/Array/Array Each
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(Различия между версиями)
Версия 17:10, 26 мая 2010
each method goes through each element of the array and passes it as a parameter to the code block you supply.
[1, "test", 2, 3, 4].each { |element| puts element.to_s + "X" }
Identify the Array and Hash of Customers
customer_array = ["A","B","C","D","E","F"] customer_hash = { "A" => "Fiction", "B" => "Mystery", "C" => "Computer", "D" => "Fiction", "E" => "Sports", "F" => "Fiction" } j=0 for i in 0...customer_array.length if customer_hash[customer_array[i]]=="Fiction" puts "#{customer_array[i]} has brought fiction books" customer_array[j]=customer_array[i] j=j+1 end end
If you have a collection, such as an array or a range, you can also use the Ruby each iterator to create a loop.
grades = [88, 99, 73, 56, 87, 64] sum = 0 grades.each do |grade| sum += grade end average = sum / grades.length puts average
