README.Ja - Type Challenges

<h1>First of Array </h1><blockquote><p>by Anthony Fu <a href="https://github.com/antfu" target="_blank">@antfu</a></p></blockquote><p><a href="https://tsch.js.org/14/play/ja" target="_blank"></a>    <a href="./README.md" target="_blank"></a> <a href="./README.zh-CN.md" target="_blank"></a> <a href="./README.ko.md" target="_blank"></a> </p>

配列Tを受け取り、その最初のプロパティの型を返すFirst<T>を実装します。

例えば：

type arr1 = ['a', 'b', 'c']
type arr2 = [3, 2, 1]

type head1 = First<arr1> // expected to be 'a'
type head2 = First<arr2> // expected to be 3

<a href="../../README.ja.md" target="_blank"></a> <a href="https://tsch.js.org/14/answer/ja" target="_blank"></a> <a href="https://tsch.js.org/14/solutions" target="_blank"></a> <hr><h3>関連する課題</h3><a href="https://github.com/type-challenges/type-challenges/blob/main/questions/00015-medium-last/README.ja.md" target="_blank"></a>