javascript - 我如何在困难的数组中进行总计

Question

我需要不同任务的帮助（对我来说不同，因为我是 JS 的新手）我有数组：

let results = [
    {
        "id": "su-1617788623816",
        "name": "СУ 2 Мельница",
        "dist": "57",
        "results":
        [
            {"crew":"13","disc":"60414658612aea0018a1f08e","time":40271011,"timeP":0,"speed":"111","shod":false,"reason":""},
            {"crew":"52","disc":"60414658612aea0018a1f08e","time":4815050,"timeP":0,"speed":"170","shod":false,"reason":""}
        ]
    },
    {
        "id": "su-1617788623816",
        "name": "СУ 2 Мельница",
        "dist": "57",
        "results":
        [
            {"crew":"13","disc":"60414658612aea0018a1f08e","time":10271011,"timeP":0,"speed":"111","shod":false,"reason":""},
            {"crew":"52","disc":"60414658612aea0018a1f08e","time":1815050,"timeP":0,"speed":"170","shod":false,"reason":""}
        ]
    }
]

我必须有这样的结果：

let result = [
    {
        "id": "su-1617788623816",
        "name": "СУ 2 Мельница",
        "dist": "57",
        "results":
        [
            {"crew":"13","disc":"60414658612aea0018a1f08e","time":X1,"timeP":0,"speed":"111","shod":false,"reason":""},
            {"crew":"52","disc":"60414658612aea0018a1f08e","time":X2,"timeP":0,"speed":"170","shod":false,"reason":""}
        ],
        "total":
        [
            {"crew":"13","disc":"60414658612aea0018a1f08e","time":X1,"timeP":0,"speed":"111","shod":false,"reason":""},
            {"crew":"52","disc":"60414658612aea0018a1f08e","time":X2,"timeP":0,"speed":"170","shod":false,"reason":""}
        ]
    },
    {
        "id": "su-1617788623816",
        "name": "СУ 2 Мельница",
        "dist": "57",
        "results":
        [
            {"crew":"13","disc":"60414658612aea0018a1f08e","time":Y1,"timeP":0,"speed":"111","shod":false,"reason":""},
            {"crew":"52","disc":"60414658612aea0018a1f08e","time":Y2,"timeP":0,"speed":"170","shod":false,"reason":""}
        ],
        "total":
        [
            {"crew":"13","disc":"60414658612aea0018a1f08e","time":Y1+X1,"timeP":0,"speed":"111","shod":false,"reason":""},
            {"crew":"52","disc":"60414658612aea0018a1f08e","time":Y2+X2,"timeP":0,"speed":"170","shod":false,"reason":""}
        ]
    }
]

我没有任何想法，结果可能超过 2。在每一步上，我必须有总当前步骤 + 之前的步骤

标签： javascriptnode.jsarraysmapreduce

Answer 1

您可以执行以下操作：

      results.forEach((ele,index)=>{
let total = results[index].results;
for(let i = 0;i<=index;i++){
results[index].results.forEach((element,index)=>{
total[index].time += element.time;
})

}
results[index].total=total;
    })

我想这应该工作！

更新 ：

上面的代码中存在参考问题，解决方法如下：

var resultsCopy = JSON.parse(JSON.stringify(results));
resultsCopy.forEach((ele,index)=>{
let total = resultsCopy[index].results;
for(let i = 0;i<=index;i++){
resultsCopy[index].results.forEach((element,index)=>{
total[index].time += element.time;
})

}
results[index].total=total;
    })