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I don’t think multiple dispatch solves this issue. Julia does have a strong type hierarchy and the proposed example with customers and accounts would be likewis

• bob1029 3y ago
  > solves this issue elegantly What about cycles? For example, "List all distinct customers from all accounts that are owned by customers who are members of some other subset of accounts".
  • JanisErdmanis 3y ago
    I agree Rust does not make it easier either. This is an interesting design problem. I tried it with ChatGPT and it did produce a robust solution. This does not seem to be a limitation for strong type hierarchy after all: ``` # Define a struct for Customer struct Customer id::Int name::String # Other customer-related fields end # Define a struct for Account struct Account id::Int balance::Float64 type::String # e.g., "Savings", "Checking" # Other account-related fields end # Define a struct to manage the many-to-many relationship struct CustomerAccount customer::Customer account::Account end # Define a struct for the Bank which holds all information struct Bank customers::Dict{Int, Customer} accounts::Dict{Int, Account} customerAccounts::Vector{CustomerAccount} end ```
    • bob1029 3y ago
      > it did produce a robust solution. Indeed. It produced a relational solution that emulates what you'd do with SQL tables. This is approximately the schema shape we use in our product today.