carlrip · December 17, 2019 18:27
diff --git a/index.ts b/index.ts
 type Person = {
  id: number;
  name: string;
  score?: number;
 }

 function getPersonScore(id: number): number {
  const person: Person = getPerson(id);
  return person.score; // 💥 - Type error - Type 'number | undefined' is not assignable to type 'number'
 }
	type Person = {
	id: number;
	name: string;
	score?: number;
	}

	function getPersonScore(id: number): number {
	const person: Person = getPerson(id);
	return person.score; // 💥 - Type error - Type 'number \| undefined' is not assignable to type 'number'
	}