buntine · September 4, 2016 11:37
diff --git a/typescript4.ts b/typescript4.ts
 interface Lengthwise {
    length: number;
 }

 function logger<T extends Lengthwise>(arg: T): void {
    console.log(arg.length);
 }

 logger([1,2,3]);
 logger({length: 20});
	interface Lengthwise {
	length: number;
	}

	function logger<T extends Lengthwise>(arg: T): void {
	console.log(arg.length);
	}

	logger([1,2,3]);
	logger({length: 20});