对象数组 转 数组对象

方法一

        let obj = {
            name: ['kobe', 'curry', 'james'],
            age: [24, 30, 23],
            gender: ['男', '男', '男'] 
        }

        let keys = Object.keys(obj)
        console.log(keys) // ['name', 'age', 'gender']
        let len = obj[keys[0]].length 
        console.log(len) // 3

        let arr = []
        for (let i = 0; i < len; i++) {
            let o = {}
            keys.forEach(r => {
                o[r] = obj[r][i]
            })
            arr.push(o)
        }
        console.log(arr)
        //    [{name: 'kobe', age: 24, gender: '男'},
        //    {name: 'curry', age: 30, gender: '男'},
        //    {name: 'james', age: 23, gender: '男'}]

方法二 

        let obj = {
            name: ['kobe', 'curry', 'james'],
            age: [24, 30, 23],
            gender: ['男', '男', '男'] 
        }
        let convert = (data) => Array.from({ length: Object.values(data)[0].length })
        .map((r, i) => Object.keys(data).reduce((total, key) => {
            total[key] = data[key][i]
            return total
        }, {}))
        console.log(convert(obj));