Question

我有一系列参数如下：

[param1, param2_experience, param3]

我有另一个这样的对象数组：

[
  {
    id: 123,
    param1_issue: "some",
    param1_star: 5,
    param2_experience_time_taken: "45 minutes",
    param3_issue_other: "some other"
  },
  {
    id: 456,
    param1_issue: "some issue",
    param1_star: 3.5,
    param3_issue_other: "some other issue"
  }
]

我想在第一个数组上填充此数组。像这样的东西：

[
  {
    id: 123,
    param1: {
      issue: "some",
      star: 5
    },
    param2_experience: {
       time_taken: "45 minutes"
    },
    param3: {
       issue_other: "some other"
    }
  },
  {
    id: 456,
    param1: {
      issue: "some issue",
      star: 3.5
    },
    param3: {
       issue_other: "some other issue"
    }
  }
]

什么是更好的方法呢？该数组可包含数千个对象。

Answer 1

您可以map将数组中的每个元素转换为具有第一个数组格式的新对象。

var keys = ["param1", "param2_experience", "param3"];
var data = [{"id":123,"param1_issue":"some","param1_star":5,"param2_experience_time_taken":"45 minutes","param3_issue_other":"some other"},{"id":456,"param1_issue":"some issue","param1_star":3.5,"param3_issue_other":"some other issue"}];

var output = _.map(data, e => {
  var obj = {};
  _.forIn(e, (val, key) => {
    var bucket = _.find(keys, k => _.startsWith(key, k));
    _.set(obj,
          bucket 
            ? [bucket, key.slice(bucket.length + 1)]
            : key,
          val);
  });
  return obj;
});

console.log(output);

<script src="https://cdn.jsdelivr.net/lodash/4.14.1/lodash.min.js"></script>

Answer 2

我想你可以这样做;

＆＃13;

StringToRayonTransformer

＆＃13;

Answer 3

您可以使用lodash#map和lodash#reduce来迭代集合和每个集合的项目，而lodash#set则返回集合中新转换的对象。这里的关键点是使用String.prototype.replace替换键的第一个int32。

＆＃13;

var result = _.map(data, function(item) {
  return _.reduce(item, function(result, value, key) {
    return _.set(result, key.replace('_', '.'), value);
  }, {});
});

＆＃13;

var data = [
  {
    id: 123,
    param1_issue: "some",
    param1_star: 5,
    param2_experience_time_taken: "45 minutes",
    param3_issue_other: "some other"
  },
  {
    id: 456,
    param1_issue: "some issue",
    param1_star: 3.5,
    param3_issue_other: "some other issue"
  }
];

var result = _.map(data, function(item) {
  return _.reduce(item, function(result, value, key) {
    return _.set(result, key.replace('_', '.'), value);
  }, {});
});

document.write('<pre>' + JSON.stringify(result, 0, 4) + '</pre>');

＆＃13;

过滤对象键并创建新的嵌套键

3 个答案: