robertcoopercode · January 9, 2019 00:30
diff --git a/generics-annotation.ts b/generics-annotation.ts
 const fillArray = <T>(len: number, elem: T) => {
    return new Array<T>(len).fill(elem);
 };

 const newArray = fillArray<string>(3, 'hi'); // => ['hi', 'hi', 'hi']

 newArray.push('bye'); // ✅
 newArray.push(true); // ❌ - only strings can be added to the array
	const fillArray = <T>(len: number, elem: T) => {
	return new Array<T>(len).fill(elem);
	};

	const newArray = fillArray<string>(3, 'hi'); // => ['hi', 'hi', 'hi']

	newArray.push('bye'); // ✅
	newArray.push(true); // ❌ - only strings can be added to the array