Obtain keys present in any lists.
{k₀, k₁, ...} | [kᵢ, vᵢ] ∈ x₀ ∪ x₁, ...; [x₀, x₁, ...] = xs
Rest
all lists
Generated using TypeDoc
Obtain keys present in any lists.
Returns
{k₀, k₁, ...} | [kᵢ, vᵢ] ∈ x₀ ∪ x₁, ...; [x₀, x₁, ...] = xs