Enum.reduce with &-/2 produces unexpected results

[stefanluptak]

Why Enum.reduce fun arguments are x, acc instead of acc, x?

Good day everyone! I am using Enum.reduce/3 (Enum — Elixir v1.9.0-rc.0) function quite often and I am regularly wondering why are the arguments for reducing function x, acc instead of acc, x. Almost all functions in Elixir are in the form of Module.function(subject_of_change, change_argument). For example MapSet.put/2 or List.delete/2. Thanks to this, we can write code like: changeset |> cast(params, [ ... ]) |> validate_required([ ... ]) |> unique_constraint( ... ) But then, when I want to …