Question

如何转换此数组：

var users = [
  {
    'date':'jan',
    'visits': 2,
    'drops': 1
  },
  {
    'date':'feb',
    'visits': 3,
    'drops': 2
  }
]

进入这个数组：

var newArray = [
  {
    'name': 'visits',
    'data': [
      2, 3
    ]
  },
  {
    'name': 'drops',
    'data': [
      1, 2
    ]
  }
]

使用

newArray = users.map(function(){
  return ...
});

谢谢！

Answer 1

你可以这样减少它：

    string signature;

    using (var sha = SHA256.Create())
    {
        long ts = (long)(DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc)).TotalMilliseconds / 1000;
        Console.WriteLine("Timestamp: " + ts);
        var computedHash = sha.ComputeHash(Encoding.UTF8.GetBytes(apiKey + sharedSecret + ts));
        signature = BitConverter.ToString(computedHash).Replace("-", "");
    }

    var client = new RestClient("https://api.test.hotelbeds.com/");
    var request = new RestRequest("/hotel-api/1.0/hotels", Method.POST);

    var body = new TestRequest
    {

        stay = new Stay
        {
            checkIn = "2016-06-18",
            checkOut = "2016-06-10",
            shiftDays = "2"
        },

        occupancies = new Occupancy[]
        {
            new Occupancy
            {
                rooms = 1,
                adults = 2, children = 1,
                paxes = new Pax [] 
                {
                    new Pax
                    {
                        type = "AD",
                        age = 30
                    },
                    new Pax
                    {
                        type = "AD",
                        age = 30
                    },
                    new Pax
                    {
                        type = "CH",
                        age = 8
                    }
                }
            }
        },

        geolocation = new Geolocation
        {
            longitude = 2.646633999999949F,
            latitude = 39.57119F,
            radius = 20,
            unit = "km"
        }

    };

    request.AddHeader("X-Signature", signature);
    request.AddHeader("Api-Key", apiKey);
    request.AddHeader("Accept", "application/json");
    request.AddHeader("Content-Type", "application/json");
    request.AddParameter("application/json", body, ParameterType.RequestBody);

    IRestResponse response = client.Execute(request);

    return View();
}

Answer 2

您可以使用缩小功能转换数组。这是动态的。

var users = [{
  'date': 'jan',
  'visits': 2,
  'drops': 1
}, {
  'date': 'feb',
  'visits': 3,
  'drops': 2
}];

function transform(data, blacklist) {
  return Object.keys(data[0]).filter(function(key) {
    return blacklist.indexOf(key) === -1;
  }).map(function(key) {
    return data.reduce(function(obj, record) {
      obj.data.push(record[key]);
      return obj;
    }, {
      name: key,
      data: []
    });
  });
}

function print(obj) {
  document.body.innerHTML = '<pre>' + JSON.stringify(obj, null, 2) + '</pre>';
}

print(transform(users, ['date']));

Answer 3

只是一个更通用的解决方案。

var users = [{ 'date': 'jan', 'visits': 2, 'drops': 1 }, { 'date': 'feb', 'visits': 3, 'drops': 2 }],
    result = function (data, names) {
        var r = [];
        data.forEach(function (a) {
            names.forEach(function (b, i) {
                r[i] = r[i] || { name: b, data: [] };
                r[i].data.push(a[b])
            });
        });
        return r;
    }(users, ['visits', 'drops']);

document.write('<pre>' + JSON.stringify(result, 0, 4) + '</pre>');

如何使用javascript地图将数组转换为另一个？

3 个答案: