Topic

til

A collection of 4 posts

Today I Learned ~D[2025-01-10]

Today's TIL has a twist ending... so stick around. Elixir has a shortcut for creating anonymous functions. I've always written: greet = fn name -> "Hello, #{name}!" end # which can be invoked greet.("Travis") # returns "Hello, Travis!" However; I came

TIL Struct matching in Guards

Not so much a TIL but I always get confused with the proper syntax. You can pattern match on a struct and use it in a guard to only let through the structs you want: @spec address_formater(BillAddress.t() | ShipAddress.t()) :: String.t() def address_formatter(%struct{} = address) when

TIL UUIDv4 vs UUIDv7

I've always run with UUID v4 because it's the default for the Ecto.UUID library in Elixir. However a coworker recommended UUID v7. Having never really looked into UUID other than to implement as a primary key the distinction was news to me. Effectively; * UUID v4

TIL INSERT INTO with SELECT constraints

In the past month I've had to write a lot of SQL to migrate a system and split existing "locations" into tenants ie. migrating data from a public schema to a tenant's schema is gets messy due to foreign key constraints. Order of operations