Ruby合并散列值 [英] Ruby merge hash value

问题描述

我编写了一个API来组织我的每日用户数据。

I've written an API to organize my daily user data.

原始格式就像

The origin format is like

"dau": {
      "2017-05-02": 1,
      "2017-05-04": 2,
      "2017-05-05": 2,
      }

"new_user": {
      "2017-05-02": 1,
      "2017-05-04": 0,
      "2017-05-07": 0,
}

很难在HTML表格中逐行显示。

It's hard to display in HTML table row by row.

因此，我希望格式变成这个。

Therefore, I want the format to become this one.

然而，我不知道该如何处理。

However, I have no idea how to deal with.

info: {
      "2017-05-02": {
            dau: 1,
            new_user: 1
      },
      "2017-05-04": {
            dau: 2,
            new_user: 0
      },
      "2017-05-05": {
            dau: 2
      },
      "2017-05-07": {
            new_user: 0
      }
}

推荐答案

假设您有 code>，然后


suppose you have data, then

(data['dau'].keys + data['new_user'].keys).uniq.map { |k| [k, { dau: data['dau'][k].to_i, new_user: data['new_user'][k].to_i } ] }.to_h

，如果您不想使用默认值/ 0值，那么，

and if you don't want default/0 values then,

(data['dau'].keys + data['new_user'].keys).uniq.map { |k| [k, { dau: data['dau'][k], new_user: data['new_user'][k] }.compact ] }.to_h

输出：

{
    "2017-05-02" => {
            :dau => 1,
        :new_user => 1
    },
    "2017-05-04" => {
            :dau => 2,
        :new_user => 0
    },
    "2017-05-05" => {
        :dau => 2
    },
    "2017-05-07" => {
        :new_user => 0
    }
}

希望它有帮助..

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