Question

我有一系列哈希

arr = [
  { :tap=> "bucket", :mobile=> "charger", :apple=> "knife", :gifted => "true" },
  { :tap=> "bucket", :mobile=> "charger", :apple=> "knife" },
  { :tap=> "bucket", :mobile=> "charger", :apple=> "knife" },
  { :tap=> "bucket", :mobile=> "charger", :apple=> "knife", :gifted => "true" }
]

我试图在以下基础上对数组哈希进行排序：gifted =＆gt; ＆＃34;真＆＃34 ;.像这样

sorted = [
  { :tap=> "bucket", :mobile=> "charger", :apple=> "knife", :gifted => "true" },
  { :tap=> "bucket", :mobile=> "charger", :apple=> "knife", :gifted => "true" }
  { :tap=> "bucket", :mobile=> "charger", :apple=> "knife" },
  { :tap=> "bucket", :mobile=> "charger", :apple=> "knife" }
]

Answer 1

arr.sort_by{|h| h[:gifted] == "true" ? 0 : 1}

Answer 2

根据您的实施情况，您还可以对这些项目进行分组

arr.group_by{|h| h[:gifted]}
#=>=> {"true"=>[{:tap=>"bucket", :mobile=>"charger", :apple=>"knife", :gifted=>"true"}, {:tap=>"bucket", :mobile=>"charger", :apple=>"knife", :gifted=>"true"}], nil=>[{:tap=>"bucket", :mobile=>"charger", :apple=>"knife"}, {:tap=>"bucket", :mobile=>"charger", :apple=>"knife"}]}

所以要获得真实的物品

arr.group_by{|h| h[:gifted]}["true"]
#=>[{:tap=>"bucket", :mobile=>"charger", :apple=>"knife", :gifted=>"true"}, {:tap=>"bucket", :mobile=>"charger", :apple=>"knife", :gifted=>"true"}]

使用键对哈希数组进行排序

2 个答案: