js 对象与数组的互相转换

        //对象转数组

        let arr1 = []

        let obj1 = {
            dr: "dr001",
            ljy: "ljy002"
        }

        for (let prop in obj1) {
            arr1.push({
                name: prop,
                ct: obj1[prop]
            })
        }

        console.log('arr', JSON.stringify(arr1, "null", 2));
        //         arr [
        //   {
        //     "name": "dr",
        //     "ct": "dr001"
        //   },
        //   {
        //     "name": "ljy",
        //     "ct": "ljy002"
        //   }
        // ]
        console.log(arr1);
        //         (2) [{…}, {…}]
        // 0: {name: "dr", ct: "dr001"}
        // 1: {name: "ljy", ct: "ljy002"}
        // length: 2
        // __proto__: Array(0)




        // 数组转对象
        let arr2 = [{
            name: 'dr',
            ct: 'dr001'
        },
        {
            name: 'ljy',
            ct: 'ljy002'
        }]
        let obj2 = {}
        arr2.forEach(item => {
            obj2[item.name] = item.ct
        })

        console.log('obj2', JSON.stringify(obj2, null, 2));
//         obj2 {
//   "dr": "dr001",
//   "ljy": "ljy002"
// }
        console.log(obj2);

// {dr: "dr001", ljy: "ljy002"}