variables3.md

使用解释性变量

Bad

	const address = "One Infinite Loop, Cupertino 95014";
	const cityZipCodeRegex = /^[^,\\]+[,\\\s]+(.+?)\s*(\d{5})?$/;
	saveCityZipCode(
	  address.match(cityZipCodeRegex)[1],
	  address.match(cityZipCodeRegex)[2]
	);

Good

	const address = "One Infinite Loop, Cupertino 95014";
	const cityZipCodeRegex = /^[^,\\]+[,\\\s]+(.+?)\s*(\d{5})?$/;
	const [_, city, zipCode] = address.match(cityZipCodeRegex) || [];
	saveCityZipCode(city, zipCode);