简单的数组，对象互换

数组,对象转换

1， 将const arr = [{label: '男',value: 0},{label: '女',value: 1}]
转为obj ===> {0: '男', 1:'女'}

2， 将obj ===> {0: '男', 1:'女'}转为
const arr = [{label: '男',value: 0},{label: '女',value: 1}]

1，	const arr = [{label: '男',value: 0},{label: '女',value: 1}]
	function f(arr) {
	let list = {}
	arr.forEach(item => {
		list[item.value] = item.label
		})
		return list
	}
	const obj = f(arr) // obj ===> {0: '男', 1:'女'}
	console.log(obj);

2， const obj = {0: '男',1: '女'}

	function f(obj) {
		let arrs = []
		for (let key in obj) {
			let obj1 = {}
			obj1.label = key
			obj1.value = obj[key]
			arrs.push(obj1)
		}
		return arrs
	}
	const arr = f(obj) // arr ===>  [{label: '男', value: 0},{label: '女', value: 1}]
	console.log(arr);