JS——数组(引用传递)

		//引用传递
		function print(arr){ //两个不同名字指向同一个地址？副本
			arr = new Array(3,4,5);
			console.log(arr);   //3,4,5
		}
		function print1(arr){
			arr[0] = 9;
		}

		var arr1 = [1,2,3,4,5];
		print(arr1);
		console.log(arr1);//1,2,3,4,5
		print1(arr1);
		console.log(arr1);//9,2,3,4,5

理解的不一定对