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  • 8. 数据分类

    在遇到数据需要根据标题等进行分类:

    //数据
    let data = [
        {
            device_id: "AAAAAAA",
            filename: "Log_2019-04-09-00-00.tar",
        },
        {
            device_id: "AAAAAAA",
            filename: "Log_2019-04-09-00-01.tar",
        },
        {
            device_id: "BBBBBBB",
            filename: "Log_2019-04-09-00-02.tar",
        },
    ];
    
    //分类
    export function classifyLogList(data) {
        let newArr = [];
        data.map((oldData, i) => {
            let index = -1;
            let alreadyExists = newArr.some((newData, j) => {
                if (oldData.device_id === newData.device_id) {
                    index = j;
                    return true
                }
            })
            if (alreadyExists) {
                newArr[index].file_list.push(oldData.filename)
            } else {
                newArr.push({
                    device_id: oldData.device_id,
                    file_list: [oldData.filename],
                })
            }
        })
        return newArr
    }
    
    
    classifyLogList(data);
    //结果
    [
        {
            device_id: "AAAAAAA",
            file_list: ["Log_2019-04-09-00-00.tar","Log_2019-04-09-00-01.tar"],
        },
        {
            device_id: "BBBBBBB",
            file_list: ["Log_2019-04-09-00-02.tar"],
        },
    ]
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  • 原文地址:https://www.cnblogs.com/wangrui38/p/10678231.html
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