// AS-IS
var oldBinding = {
	name : 'old name',
	arr : ['oldArr1', 'oldArr2'],
	printArr: function() {
		var that = this;		// oldBinding 을 가리키는 this 를 that 에 할당
		this.arr.forEach(function (v) {
			console.log(that.name, v);
		});
	}
};
oldBinding.printArr();	// old name oldArr1, old name oldArr2
 
 
// TO-BE
const newBinding = {
	name : 'new name',
	arr : ['newArr1', 'newArr2'],
	printArr() {
		this.arr.forEach(v => {		// 화살표 함수를 사용했기 때문에 상위 스코프의 this 를 그대로 사용
			console.log(this.name, v);
		});
	}
};
newBinding.printArr();		// new name newArr1, new name newArr2

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