geomago · June 19, 2020 14:15
diff --git a/merge_arrays_2.js b/merge_arrays_2.js
 let allCars = cars2.reduce( 
 	(result,item) => {
 		if ( cars.findIndex( car => car.id == item.id ) < 0) {
 			result.push(item);
 		}
 		return result;
 	},
 	cars.slice(0)
 );
	let allCars = cars2.reduce(
	(result,item) => {
	if ( cars.findIndex( car => car.id == item.id ) < 0) {
	result.push(item);
	}
	return result;
	},
	cars.slice(0)
	);