Add bin and edit workflow

bin/gems/ttfunk-1.8.0/lib/ttfunk/sum.rb

@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+module TTFunk
+  # Sum aggreaget. Is sums all pushed values.
+  class Sum < Aggregate
+    # Value
+    #
+    # @return [#+]
+    attr_reader :value
+
+    # @param init_value [#+] initial value
+    def initialize(init_value = 0)
+      super()
+      @value = init_value
+    end
+
+    # Push a value. It will be added to the current value.
+    #
+    # @param operand [any]
+    # @return [void]
+    def <<(operand)
+      @value += coerce(operand)
+    end
+
+    # Get the stored value or default.
+    #
+    # @param _default [any] Unused. Here for API compatibility.
+    # @return [any]
+    def value_or(_default)
+      # value should always be non-nil
+      value
+    end
+  end
+end