Update interpreter pattern examples

Author: nemanjarogic

src/AdditionalPatterns/Interpreter/InterpreterLibrary/DateExample/Context.cs

@@ -9,6 +9,5 @@ public Context(DateTime date, string expression)
     }
 
     public DateTime Date { get; set; }
-
     public string Expression { get; set; }
-}
+}

src/AdditionalPatterns/Interpreter/InterpreterLibrary/DateExample/DateExecutor.cs

@@ -34,4 +34,4 @@ private static void Interpret(List<IExpression> expressions, Context context)
 
         Console.WriteLine($"Interpreter result for {contextFormat} format: {context.Expression}");
     }
-}
+}

src/AdditionalPatterns/Interpreter/InterpreterLibrary/DateExample/Expressions/Common/IExpression.cs

@@ -3,4 +3,4 @@
 public interface IExpression
 {
     void Evaluate(Context context);
-}
+}

src/AdditionalPatterns/Interpreter/InterpreterLibrary/DateExample/Expressions/Terminal/DayExpression.cs

@@ -9,4 +9,4 @@ public void Evaluate(Context context)
         string expression = context.Expression;
         context.Expression = expression.Replace("DD", context.Date.Day.ToString());
     }
-}
+}

src/AdditionalPatterns/Interpreter/InterpreterLibrary/DateExample/Expressions/Terminal/MonthExpression.cs

@@ -9,4 +9,4 @@ public void Evaluate(Context context)
         string expression = context.Expression;
         context.Expression = expression.Replace("MM", context.Date.Month.ToString());
     }
-}
+}

src/AdditionalPatterns/Interpreter/InterpreterLibrary/DateExample/Expressions/Terminal/SeparatorExpression.cs

@@ -9,4 +9,4 @@ public void Evaluate(Context context)
         string expression = context.Expression;
         context.Expression = expression.Replace(" ", "-");
     }
-}
+}

src/AdditionalPatterns/Interpreter/InterpreterLibrary/DateExample/Expressions/Terminal/YearExpression.cs

@@ -9,4 +9,4 @@ public void Evaluate(Context context)
         string expression = context.Expression;
         context.Expression = expression.Replace("YYYY", context.Date.Year.ToString());
     }
-}
+}

src/AdditionalPatterns/Interpreter/InterpreterLibrary/Executor.cs

@@ -13,4 +13,4 @@ public override void Execute()
         DateExecutor.Execute();
         SandwichExecutor.Execute();
     }
-}
+}

src/AdditionalPatterns/Interpreter/InterpreterLibrary/InterpreterLibrary.csproj

@@ -12,7 +12,6 @@
 
 	<ItemGroup>
 		<Folder Include="Assets\" />
-		<Folder Include="DateExample\Expressions\NonTerminal\" />
 	</ItemGroup>
 
 </Project>

src/AdditionalPatterns/Interpreter/InterpreterLibrary/SandwichExample/Context.cs

@@ -2,5 +2,5 @@
 
 public class Context
 {
-    public string Output { get; set; }
-}
+    public string Output { get; set; } = string.Empty;
+}