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概要

paiza.ioでelixirやってみた。
練習問題やってみた。

練習問題

通帳に300円あります。
1000円、入金して、500円、払い出しました。

サンプルコード


defmodule Account2 do
	defstruct balance: 0
	def withdraw(account, delta) do
		%Account2{ balance: account.balance - delta }
	end
	def deposit(account, delta) do
		%Account2{ balance: account.balance + delta }
	end
end

defmodule Main do
	require Account2
    my = %Account2{balance: 300}
    |> IO.inspect
    my = Account2.deposit(my, 1000)
    |> IO.inspect
    my = Account2.withdraw(my, 500)
    |> IO.inspect
end


実行結果

%Account2{balance: 300}
%Account2{balance: 1300}
%Account2{balance: 800}

成果物

以上。

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