按 ruby​​ 中的值对哈希进行分组 [英] Group Hash by values in ruby

问题描述

我在 ruby​​ 中有一个散列，看起来像这样:

I have a hash in ruby which looks something like this:

{
  "admin_milestones"=>"1",
  "users_milestones"=>"0",
  "admin_goals"=>"1",
  "users_goals"=>"0", 
  "admin_tasks"=>"1", 
  "users_tasks"=>"0",
  "admin_messages"=>"1",
  "users_messages"=>"0",
  "admin_meetings"=>"1",
  "users_meetings"=>"0"
}

我正在寻找一种解决方案，可以将这个散列分成两部分，一个值为 1，另一个散列值为 0.

I am trying to lookout for a solutions which can cut this hash in to two parts, one with value as 1 and other hash with value as 0.

推荐答案

您可以按哈希值分组:

h1 = {
  "admin_milestones"=>"1",
  "users_milestones"=>"0",
  "admin_goals"=>"1",
  "users_goals"=>"0", 
  "admin_tasks"=>"1", 
  "users_tasks"=>"0",
  "admin_messages"=>"1",
  "users_messages"=>"0",
  "admin_meetings"=>"1",
  "users_meetings"=>"0"
}

h2 = h1.group_by{|k,v| v}

它将产生一个按其值分组的散列，如下所示:

It will produce a hash grouped by its values like this:

h2 = {"1"=>[["admin_milestones", "1"], ["admin_goals", "1"], ["admin_tasks", "1"], ["admin_messages", "1"], ["admin_meetings", "1"]], 
"0"=>[["users_milestones", "0"], ["users_goals", "0"], ["users_tasks", "0"], ["users_messages", "0"], ["users_meetings", "0"]]} 

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