数组内嵌套对象的格式怎么改成数组嵌套数组

Question

后端给我的arr的格式怎么变成arr1这样的

let arr = [
            {date:'2023-03-05',name:'aaa产量',value:'123'},
            {date:'2023-03-05',name:'bbb产量',value:'456'},
            {date:'2023-03-05',name:'ccc产量',value:'456'},
            {date:'2023-03-05',name:'aaa消耗',value:'789'},
            {date:'2023-03-05',name:'bbb消耗',value:'123'},
            {date:'2023-03-05',name:'ccc消耗',value:'123'},
            {date:'2023-03-06',name:'aaa产量',value:'123'},
            {date:'2023-03-06',name:'bbb产量',value:'456'},
            {date:'2023-03-06',name:'ccc产量',value:'456'},
            {date:'2023-03-06',name:'aaa消耗',value:'789'},
            {date:'2023-03-06',name:'bbb消耗',value:'123'},
            {date:'2023-03-06',name:'ccc消耗',value:'123'},
        ]
        let arr1 = [
            ['2023-03-05','aaa产量-消耗','产量值','消耗值'],
            ['2023-03-05','bbb产量-消耗','产量值','消耗值'],
            ['2023-03-06','aaa产量-消耗','产量值','消耗值'],
            ....
        ]

Answer 1

通过使用Array.map()方法可以将数组内嵌套的对象转换成数组嵌套数组。例如：

let arr = [ {a: 1, b: 2}, {a: 3, b: 4}, {a: 5, b: 6} ];

let result = arr.map(item => { return [item.a, item.b]; });

console.log(result);

// [[1,2],[3,4],[5,6]]