Deterministically sort an array based on the date

sort_depending_on_date.rb

# requires active_support

list = [:foo, :bar, :baz]

# Today:
seed = Time.find_zone!('America/Los_Angeles').today.at_beginning_of_day.to_i
list.shuffle(random: Random.new(seed)) # => [:bar, :baz, :foo]
list.shuffle(random: Random.new(seed)) # => [:bar, :baz, :foo]

# Tomorrow:
seed = (Time.find_zone!('America/Los_Angeles').today + 1).at_beginning_of_day.to_i
list.shuffle(random: Random.new(seed)) # => [:baz, :foo, :bar]
list.shuffle(random: Random.new(seed)) # => [:baz, :foo, :bar]