Sorting array of hashes with its keys

Question

i have an array of hashes

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" }
]

I am trying to sort the array hashes on the basis of :gifted=> "true". like this

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" }
]

aherve · Accepted Answer · 2014-03-12 09:36:31Z

4

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

answered Mar 12, 2014 at 9:36

aherve

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engineersmnky · Accepted Answer · 2014-03-12 13:26:06Z

1

Depending on your implementation you could also group these items

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"}]}

so to get true objects

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

answered Mar 12, 2014 at 13:26

engineersmnky

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