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口で言うより行うことがErlang習得への近道と信じています。

lists:any/2

 リストの要素に対して適用する真偽値を返す関数を渡します。 少なくとも1つの要素が trueと評価されればtrue、そうでなければ falseが返されます。

> Words = ["foo", "bar", "hello"].

> lists:any(fun(S) -> string:length(S) == 5 end, Words).
true

> lists:all(fun(S) -> string:length(S) < 5 end, Words).
false

listsモジュールには他にもリスト処理のための関数がたくさんあります。

Elixirにも挑戦したい

闘魂ElixirシリーズとElixir Schoolがオススメです。

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