Sort Hash

Sort hash by key using .sort#

  • .sort changes hash to array, so need to put .to_h at the end.
  • sorts by key.
[22] pry(main)> values = { "two": 2, "three": 3, "one": 1 }
=> {:two=>2, :three=>3, :one=>1}
[23] pry(main)> values.sort.to_h
=> {:one=>1, :three=>3, :two=>2}

Sort hash by value in ascending order using .sort_by#

[25] pry(main)> values
=> {:two=>2, :three=>3, :one=>1}
[26] pry(main)> values.sort_by{|k,v| v}
=> [[:one, 1], [:two, 2], [:three, 3]]
[43] pry(main)> values.sort_by{|k,v| v }.to_h
=> {:one=>1, :two=>2, :three=>3}

Sort hash by value in descending order using .sort_by#

[29] pry(main)> values
=> {:two=>2, :three=>3, :one=>1}
[30] pry(main)> values.sort_by{|k,v| -v}
=> [[:three, 3], [:two, 2], [:one, 1]]
[44] pry(main)> values.sort_by{|k,v| -v }.to_h
=> {:three=>3, :two=>2, :one=>1}

Sort hash by key in ascending order using .sory_by#

[46] pry(main)> values
=> {:two=>2, :three=>3, :one=>1}
[47] pry(main)> values.sort_by{|k,v| k }.to_h
=> {:one=>1, :three=>3, :two=>2}
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