【ruby】連番をキーとし配列を値にしてるハッシュ

irb(main):016:0> n = 4
=> 4
irb(main):017:0> table = (1..n).to_a.zip(Array.new(n, Array.new)).to_h
=> {1=>[], 2=>[], 3=>[], 4=>[]}
irb(main):018:0> table[1] << 1
=> [1]
irb(main):019:0> table
=> {1=>[1], 2=>[1], 3=>[1], 4=>[1]}

👿

irb(main):030:0> table = (1..n).to_a.map{|i| [i, Array.new]}.to_h
=> {1=>[], 2=>[], 3=>[], 4=>[]}
irb(main):031:0> table[1] << "あばばばばば"
=> ["あばばばばば"]
irb(main):032:0> table
=> {1=>["あばばばばば"], 2=>[], 3=>[], 4=>[]}

👼