使用lodash将数组映射到对象

Question

我有这个数组：

[ [ '2018-05-28T21:51:00Z',
    0.00000858,
    0.00000857,
    0.00000860,
    0.00000855,
    12511.81490226 ],
  [ '2018-05-28T21:52:00Z',
    0.00000853,
    0.00000850,
    0.00000856,
    0.00000847,
    12687.20140187 ],
  [ '2018-05-28T21:53:00Z',
    0.00000848,
    0.00000847,
    0.00000850,
    0.00000846,
    12708.9320888 ]
]

我需要将其转换为：

{ 
    T: [ '2018-05-28T21:51:00Z', '2018-05-28T21:52:00Z', '2018-05-28T21:53:00Z' ],
    O: [ 0.00000858, 0.00000853, 0.00000848],
    C: [ 0.00000857, 0.00000850, 0.00000847],
    H: [ 0.00000860, 0.00000856, 0.00000850],
    L: [ 0.00000855, 0.00000847, 0.00000846],
    V: [ 12511.81490226, 12687.20140187, 12708.9320888 ]
}

它是预定义的位置，第一个值始终为“ T”，第二个值始终为“ O”，依此类推。

尝试过这样的lodash

_.zipObject(['T', 'O', 'H', 'L', 'C'], s.values) 

但是结果不是预期的。 有什么建议吗？

Answer 1

不需要库，您可以使用简单的Javascript轻松完成此操作：

 const input=[['2018-05-28T21:51:00Z',0.00000858,0.00000857,0.00000860,0.00000855,12511.81490226],['2018-05-28T21:52:00Z',0.00000853,0.00000850,0.00000856,0.00000847,12687.20140187],['2018-05-28T21:53:00Z',0.00000848,0.00000847,0.00000850,0.00000846,12708.9320888]] const keys = ['T', 'O', 'C', 'H', 'L', 'V']; const arrs = input.reduce((accum, item) => { keys.forEach((key, i) => accum[key].push(item[i])); return accum; }, keys.reduce((a, key) => { a[key] = []; return a }, {})); console.log(arrs); 

Answer 2

您可以使用zip和zipobject来做到这一点：

 var input = [ [ '2018-05-28T21:51:00Z', 0.00000858, 0.00000857, 0.00000860, 0.00000855, 12511.81490226 ], [ '2018-05-28T21:52:00Z', 0.00000853, 0.00000850, 0.00000856, 0.00000847, 12687.20140187 ], [ '2018-05-28T21:53:00Z', 0.00000848, 0.00000847, 0.00000850, 0.00000846, 12708.9320888 ] ]; var output = _.zipObject(['T', 'O', 'H', 'L', 'C'], _.zip.apply(_, input)); 

 <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/1.2.1/lodash.min.js"></script> 

Answer 3

您可以这样做：

const trans  = data[0].map((col, i) => data.map(row => row[i]));

_.zipObject(['T', 'O', 'H', 'L', 'C'], trans) 

数据是您的初始数组。