Return Early

Return Early

• Return Early Pattern. A rule that will make your code more… | by Leonel Menaia | The Startup | Medium
• Structured programming - Wikipedia
• Rust Error Handling

public String returnStuff(SomeObject argument1, SomeObject argument2){
      if (!argument1.isValid()) {
            throw new Exception();
      }
 
      if (!argument2.isValid()) {
            throw new Exception();
      }
 
      SomeObject otherVal1 = doSomeStuff(argument1, argument2);
 
      if (!otherVal1.isValid()) {
            throw new Exception();
      }
 
      SomeObject otherVal2 = doAnotherStuff(otherVal1);
 
      if (!otherVal2.isValid()) {
            throw new Exception();
      }
 
      return "Stuff";
}

• Fail fast
• Single Entry, Single Exit (SESE)

Disadvantage

• Unable to clean resources