No exact matches in call to instance method ‘append’

    
      

        When you see an error message like "no exact matches in call to instance method 'append'", it means that you are trying to call a method called 'append' on an object, but the compiler cannot find an exact matching method with the given arguments. This error typically occurs in programming languages like Python, Java, or C++.
      
      

        To fix this error, you need to review the method signature and make sure that the arguments you are passing to the method match the expected types and number of parameters. The error message might also provide additional information about the expected parameter types.
      
      

        Here's an example to illustrate the error:
      
      
        
          class MyClass {
              public void append(String str) {
                  System.out.println(str);
              }
          }
          // ...
          MyClass myObject = new MyClass();
          int number = 5;
          myObject.append(number); // Error: no exact matches in call to instance method 'append'
          // The error occurs because the 'append' method expects a String argument, but we are passing an integer.
        
      

        In the above example, the 'append' method expects a String argument, but we are trying to pass an integer. Since there is no exact method matching 'append' with an integer parameter defined in the class, the compiler throws an error.
      

        To fix the error, we need to ensure that we pass a String argument to the 'append' method, like this:
      
        
          myObject.append("Hello"); // Correct: passes a String argument
        
      

        In this corrected code, we pass a String argument "Hello" to the 'append' method, which matches the expected parameter type, and the error is resolved.