Permutations of Boolean values in ruby hash -

i need implement function gets array symbols parameters [:a :b :c], , returns array contains possible permutations of boolean values mapped symbols in hash

like

[{a: true, b: true, c: true}, {a: false, b: true, c: true}, {a: true, b: false, c: true}, {a: true, b: true, c: false}, {a: true, b: false, c: false}, {a: false, b: false, c: true}, {a: false, b: true, c: false}, {a: false, b: false, c: false}] 

what elegant way implement such thing in ruby?

i use repeated_permutation task:

[true, false].repeated_permutation(3)              .map { |a, b, c| { a: a, b: b, c: c } } #=> [{:a=>true, :b=>true, :c=>true}, #    {:a=>true, :b=>true, :c=>false}, #    {:a=>true, :b=>false, :c=>true}, #    {:a=>true, :b=>false, :c=>false}, #    {:a=>false, :b=>true, :c=>true}, #    {:a=>false, :b=>true, :c=>false}, #    {:a=>false, :b=>false, :c=>true}, #    {:a=>false, :b=>false, :c=>false}] 

or array of keys:

keys = %i(a b c) [true, false].repeated_permutation(keys.size)              .map { |values| keys.zip(values).to_h }