Answer to https://www.v2ex.com/t/549747

v2ex-t-549747.js

// 插入时间
const timeData = ['1:00', '2:00', '3:00', '4:00', '5:00', '6:00'];

// 源数据
const sourceData = {
    parent1: {
        child1: [1, 2, 3, 4, 5, 6],
        child2: [11, 22, 33, 44, 55, 66],
        child3: [111, 222, 333, 444, 555, 666],
    },
    parent2: {
        child1: [10, 20, 30, 40, 50, 60],
        child2: [110, 220, 330, 440, 550, 660],
        child3: [1110, 2220, 3330, 4440, 5550, 6660],
    },
    parent3: {
        child1: [101, 202, 303, 404, 505, 606],
        child2: [1101, 2202, 3303, 4404, 5505, 6606],
        child3: [11101, 22202, 33303, 44404, 55505, 66606],
    },
};

// Object 的 keys 的顺序是不确定的，所以 Object.keys() 不能保证结果 array 的顺序。
// 这里直接用 hard-coded 演示，如果可以排序，可以考虑用 Object.keys(sourceData).sort()
const outputData = [];
['parent1', 'parent2', 'parent3'].reduce((output, parentKey) => {
    // 子条目用的是 Object，所以与 key 顺序无关，可以直接取
    const childKeys = Object.keys(sourceData[parentKey]);
    timeData.forEach((timeVal, idx) => {
        output.push(childKeys.reduce((itemRet, childKey) => {
            itemRet[childKey] = {value: sourceData[parentKey][childKey][idx]};
            return itemRet;
        }, {time: {value: timeVal}}));
    });
    return output;
}, outputData);

console.log(outputData);

/**
outputData = [
    {
        time: {value: '1:00'},
        child1: {value: 1},
        child2: {value: 11},
        child3: {value: 111},
    },
    {
        time: {value: '2:00'},
        child1: {value: 2},
        child2: {value: 22},
        child3: {value: 222},
    },
    {
        time: {value: '3:00'},
        child1: {value: 3},
        child2: {value: 33},
        child3: {value: 333},
    },
    {
        time: {value: '4:00'},
        child1: {value: 4},
        child2: {value: 44},
        child3: {value: 444},
    },
    {
        time: {value: '5:00'},
        child1: {value: 5},
        child2: {value: 55},
        child3: {value: 555},
    },
    {
        time: {value: '6:00'},
        child1: {value: 6},
        child2: {value: 66},
        child3: {value: 666},
    },
    {
        time: {value: '1:00'},
        child1: {value: 10},
        child2: {value: 110},
        child3: {value: 1110},
    },
    {
        time: {value: '2:00'},
        child1: {value: 20},
        child2: {value: 220},
        child3: {value: 2220},
    },
    {
        time: {value: '3:00'},
        child1: {value: 30},
        child2: {value: 330},
        child3: {value: 3330},
    },
    {
        time: {value: '4:00'},
        child1: {value: 40},
        child2: {value: 440},
        child3: {value: 4440},
    },
    {
        time: {value: '5:00'},
        child1: {value: 50},
        child2: {value: 550},
        child3: {value: 5550},
    },
    {
        time: {value: '6:00'},
        child1: {value: 60},
        child2: {value: 660},
        child3: {value: 6660},
    },
    {
        time: {value: '1:00'},
        child1: {value: 101},
        child2: {value: 1101},
        child3: {value: 11101},
    },
    {
        time: {value: '2:00'},
        child1: {value: 202},
        child2: {value: 2202},
        child3: {value: 22202},
    },
    {
        time: {value: '3:00'},
        child1: {value: 303},
        child2: {value: 3303},
        child3: {value: 33303},
    },
    {
        time: {value: '4:00'},
        child1: {value: 404},
        child2: {value: 4404},
        child3: {value: 44404},
    },
    {
        time: {value: '5:00'},
        child1: {value: 505},
        child2: {value: 5505},
        child3: {value: 55505},
    },
    {
        time: {value: '6:00'},
        child1: {value: 606},
        child2: {value: 6606},
        child3: {value: 66606},
    }];