JavaScript中关于数组的调用方式

	var i = ['a','b','c']
	console.log(i[1]);

	var arr = ['a','b','c','d','e'];
	for (index in arr) [
		console.log(arr[index]);
	}
	//普通for循环
	for (var i = 0;i<arr.length;i++) {
		console.log(arr[i]);
	}

function show() {
  [].forEach.call(arguments, (v, i) => {
    console.log(v);
  });
}

function show() {
  [].forEach.apply(arguments, [
    (v, i) => {
      console.log(v);
    },
  ]);
}

function show() {
  [].forEach.bind(arguments)((v, i) => {
    console.log(v);
  });
}