SOURCE

 let arr = [
        [
            "2019-08-21T16:48:56+08:00",
            -6.57
        ],
        [
            "2019-08-21T16:49:26+08:00",
            -6.67
        ],
        [
            "2019-08-21T16:49:56+08:00",
            -6.66
        ],
        [
            "2019-08-21T16:50:26+08:00",
            -6.78
        ],
        [
            "2019-08-21T16:50:56+08:00",
            -6.79
        ],
        [
            "2019-08-21T16:51:26+08:00",
            -6.79
        ],
        [
            "2019-08-21T16:51:56+08:00",
            -6.88
        ],
        [
            "2019-08-21T16:52:26+08:00",
            -6.89
        ],
        [
            "2019-08-21T16:52:56+08:00",
            -6.95
        ],
        [
            "2019-08-21T16:53:26+08:00",
            -6.89
        ],
        [
            "2019-08-21T16:53:56+08:00",
            -6.86
        ],
        [
            "2019-08-21T16:54:26+08:00",
            -6.96
        ],
        [
            "2019-08-21T16:54:56+08:00",
            -7.0
        ],
        [
            "2019-08-21T16:55:26+08:00",
            -7.16
        ],
        [
            "2019-08-21T16:55:56+08:00",
            -7.2
        ],
        [
            "2019-08-21T16:56:26+08:00",
            -7.29
        ],
        [
            "2019-08-21T16:56:56+08:00",
            -7.14
        ],
        [
            "2019-08-21T16:57:26+08:00",
            -6.98
        ],
        [
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            -6.82
        ],
        [
            "2019-08-21T16:58:26+08:00",
            -6.65
        ],
        [
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            -6.35
        ],
        [
            "2019-08-21T16:59:26+08:00",
            -5.97
        ],
        [
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            -5.67
        ],
        [
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            -5.2
        ],
        [
            "2019-08-21T17:00:56+08:00",
            -4.94
        ],
        [
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            -4.57
        ],
        [
            "2019-08-21T17:01:56+08:00",
            -4.34
        ],
        [
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            -4.15
        ],
        [
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            -3.91
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        [
            "2019-08-21T17:03:26+08:00",
            -3.78
        ],
        [
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            -3.57
        ],
        [
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            -3.33
        ],
        [
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            -3.15
        ],
        [
            "2019-08-21T17:05:26+08:00",
            -2.94
        ],
        [
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            2.28
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            0.49
        ],
        [
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        ],
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            -1.7
        ],
        [
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            -2.54
        ],
        [
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            -2.75
        ],
        [
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            -2.58
        ],
        [
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            -2.3
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        [
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            -1.97
        ],
        [
            "2019-08-21T17:35:43+08:00",
            -1.73
        ],
        [
            "2019-08-21T17:36:13+08:00",
            -1.52
        ],
        [
            "2019-08-21T17:36:43+08:00",
            -1.43
        ],
        [
            "2019-08-21T17:37:13+08:00",
            -1.51
        ],
        [
            "2019-08-21T17:37:43+08:00",
            -1.69
        ],
        [
            "2019-08-21T17:38:13+08:00",
            -1.98
        ],
        [
            "2019-08-21T17:38:43+08:00",
            -2.33
        ],
        [
            "2019-08-21T17:39:13+08:00",
            -2.38
        ],
        [
            "2019-08-21T17:39:43+08:00",
            -2.21
        ],
        [
            "2019-08-21T17:40:13+08:00",
            -1.98
        ],
        [
            "2019-08-21T17:40:43+08:00",
            -1.87
        ],
        [
            "2019-08-21T17:41:13+08:00",
            -2.16
        ],
        [
            "2019-08-21T17:41:43+08:00",
            -2.52
        ],
        [
            "2019-08-21T17:42:13+08:00",
            -2.46
        ],
        [
            "2019-08-21T17:42:43+08:00",
            -1.75
        ],
        [
            "2019-08-21T17:43:13+08:00",
            -0.77
        ],
        [
            "2019-08-21T17:43:43+08:00",
            -0.34
        ],
        [
            "2019-08-21T17:44:13+08:00",
            0.63
        ],
        [
            "2019-08-21T17:44:43+08:00",
            1.61
        ],
        [
            "2019-08-21T17:45:13+08:00",
            2.31
        ],
        [
            "2019-08-21T17:45:43+08:00",
            2.54
        ],
        [
            "2019-08-21T17:46:13+08:00",
            2.66
        ],
        [
            "2019-08-21T17:46:43+08:00",
            2.55
        ],
        [
            "2019-08-21T17:47:13+08:00",
            2.57
        ]
    ];

let res = {
      "categories": ["2012", "2013", "2014", "2015", "2016", "2017"],

      "series": [{

        "name": "成交量A",

        "data": [35, 8, 25, 37, 4, 20]

      }]

};

function chartLine(arr){
    let res = {
      categories: ["2012", "2013", "2014", "2015", "2016", "2017"],

      series: [{

        name: "",

        data: [35, 8, 25, 37, 4, 20]

      }]

    };


    arr.forEach((item,index)=>{
        res.categories[0] = item[0];
        res.series[0].data[0] = item[1];
    });

    return res;
}

console.log(chartLine(arr));