Notes on ‘Refactoring ‘ — 5.1 Seperate Query from Modifier

Before Refactoring

  getPersonAndIncreaseCounter(){
     counter ++;
     return person; 
  }

After Refactoring

  getPerson(){
     return person; 
  }
  
  increaseCounter{
     counter ++;
  }

Benefits

    You can call getPerson() as often as you like. You have a lot less to worry about.

Exception

   It’s OK to change personCache in getPerson() method.