PROSAGA码农传奇-Ruby-加入两个哈希值

0# 谦成 | 2019-08-31 10-32

<div class =“post-text”itemprop =“text”>
  <P>
    基于简单索引的方法可能如下所示：
  </p>
   <pre>
    <code>
      array_1 = [
  {:user=>"Maria", :alerts=>{:rfc=>"This rfc is invalid"}},
  {:user=>"Juan", :alerts=>{:email=>"This email is invalid"}}
]

array_2 = [
  {:user=>"Maria", :alerts=>{:income_in_the_mean=>true, :credit_in_the_mean=>true}},
  {:user=>"Juan", :alerts=>{:income_in_the_mean=>false, :credit_in_the_mean=>true}}
]

array_1.zip(array_2).map { |item_1, item_2| item_1.deep_merge(item_2) }
#=> [
#   {:user=>"Maria", :alerts=>{:rfc=>"This rfc is invalid", :income_in_the_mean=>true, :credit_in_the_mean=>true}},
#   {:user=>"Juan", :alerts=>{:email=>"This email is invalid", :income_in_the_mean=>false, :credit_in_the_mean=>true}}
# ]

</code>
  </pre>
  <P>
    运用
    <a href="http://ruby-doc.org/core-2.6.1/Array.html#method-i-zip" rel="nofollow noreferrer">
       <code>
        Array#zip
      </code>
    </A>
     和Rails
    <a href="https://api.rubyonrails.org/classes/Hash.html#method-i-deep_merge" rel="nofollow noreferrer">
       <code>
        #deep_merge
      </code>
    </A>
    。为此，数组必须具有相同的大小，并且要合并的元素必须位于相同的索引位置。
  </p>
</DIV>

1# 别烦我 | 2019-08-31 10-32

<div class =“post-text”itemprop =“text”>
  <P>
    这是一个纯Ruby解决方案。
  </p>
   <pre>
    <code>
      arr = [
  [
    {:user=>"Maria",
     :alerts=>{:rfc=>"This rfc is invalid"}},
    {:user=>"Juan",
     :alerts=>{:email=>"This email is invalid"}}
  ],
  [
    {:user=>"Maria",
       :alerts=>{:income_in_the_mean=>true, :credit_in_the_mean=>true}},
    {:user=>"Juan",
       :alerts=>{:income_in_the_mean=>false, :credit_in_the_mean=>true}}
  ]
]

</code>
  </pre>
  <H1>
    <P>
    </p>
  </H1>
   <pre>
    <code>
      arr.flatten.group_by { |h| h[:user] }.map do |user,a|
  { user: user, alerts: a.reduce({}) { |h,g| h.merge(g[:alerts]) } }
end
  #=> [{:user=>"Maria",
  #     :alerts=>{:rfc=>"This rfc is invalid", :income_in_the_mean=>true,
  #               :credit_in_the_mean=>true}},
  #    {:user=>"Juan",
  #     :alerts=>{:email=>"This email is invalid", :income_in_the_mean=>false,
  #               :credit_in_the_mean=>true}}]

</code>
  </pre>
  <P>
    注意：
  </p>
   <pre>
    <code>
      arr.flatten.group_by { |h| h[:user] }
  #=> {"Maria"=>[{:user=>"Maria", :alerts=>{:rfc=>"This rfc is invalid"}},
  #              {:user=>"Maria", :alerts=>{:income_in_the_mean=>true,
  #                 :credit_in_the_mean=>true}}],
  #    "Juan" =>[{:user=>"Juan", :alerts=>{:email=>"This email is invalid"}},
  #              {:user=>"Juan", :alerts=>{:income_in_the_mean=>false,
  #                 :credit_in_the_mean=>true}}]}

</code>
  </pre>
  <P>
     <code>
      arr
    </code>
     当然可以是任何尺寸。
  </p>
</DIV>

2# 青年@ | 2019-08-31 10-32