May 2019
Beginner to intermediate
296 pages
6h 58m
Japanese
Content preview from IT用語図鑑 ビジネスで使える厳選キーワード256
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
247
6
I
T
関連用語
用語に関連する話
用語の使用例
再 帰 呼び 出し
自分自身を呼び出す関数
プログラムにおいて、処理の中で自分自身を呼び出す関数を再帰呼び出しと言う。身近な
例 で 考えると、カメラでテレビを撮 影しながら、撮 影している内 容 をそのテレビ に映 すと、
テレビ の中に無 限にテレビが 映し出される。自分自身を呼 び出す 処 理を、少しだけ引数を
変えながら実 行 するプログラムは、繰り返し処 理よりシンプ ル に実 装できることが 多 い。
「再帰呼び出しを使うとソースコードが 短くなったよ。」
関数型言語で多く使われる
関数型言語では変数の値を書き
換えるなど状態を変化させる方
法を基本的に使わず、ループの代
わりに再帰呼び出しを使うこと
が多い。
終了条件が必須
再帰呼び出しをする場合には、引
数の内容に応じた終了条件を指
定しておかないと無限に処理を
繰り返してしまうため、終了条件
が必須である。
末尾再帰と最適化
自身の再帰呼び出しが、関数の最
後のステップになっている再帰
関数を末尾再帰と言い、スタック
の消費を減らして最適化できる
ことが知られている。
Keyword
222
▶
さいきよび だし
関数と引数、手続きとルーチン
……P246
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.