new tasks

Task/Collections/Ruby/collections-2.rb

@@ -0,0 +1,9 @@
+# creating an empty hash
+
+h = {}            # => {}
+h["a"] = 1        # => {"a" => 1}
+h["test"] = 2.4   # => {"a" => 1, "test" => 2.4}
+h[3] = "Hello"    # => {"a" => 1, "test" => 2.4, 3 => "Hello"}
+
+# creating a hash with the constructor
+h = Hash.new      # => {}

Task/Collections/Ruby/collections.rb

@@ -0,0 +1,8 @@
+# creating an empty array and adding values
+
+a = []            # => []
+a[0] = 1          # => [1]
+a[3] = 2          # => [1, nil, nil, 2]
+
+# creating an array with the constructor
+a = Array.new     # => []