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ThaddeusJiang/date_helper.exs

Created November 28, 2023 03:27
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Elixir pattern-matching functions
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date_helper.exs
defmodule DateHelper do
def from_date(:undefined) do
:undefined
end
def from_date(:null) do
:undefined
end
def from_date(date) do
date.year
end
end
DateHelper.from_date(:undefined)
# :undefined
DateHelper.from_date(:null)
# :undefined
DateHelper.from_date(Date.utc_today())
# 2023
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