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理解しやすいコード
本:リーダブルコード
優れたコードってなんだろ?
# bananaという文字がきたらgoodという文字をつける
my @word_array = ("apple","banana","orange")
#コードA
my @arrayA = map { $_."good" } grep { $_ = /banana/ }
@word_array;
#コードB
my @arrayB;
for my word (@word_array) {
next if $word ne "banana";
push @arrayB, $word."good";
}
コードA
- 簡潔
コードB
- 安心できる
どっちがいいか

どうやって決める?
となる考え
コードは理解しやすくなけれ
ばいけない
他の人がコードを理解するま
での時間を最短にする
理解するとは
-
-
理解するとは
- バグを発見しやすい
-
理解するとは
- バグを発見しやすい
- 変更を加えやすい etc
自分しかふれないコードだっ
たら他の人が理解できなくて
も、自分がわかってたらいい
んじゃない?
他の人
¦¦
数カ月後のそのコードをみる

自分自身かもしれない
- 変数名
- 改行を える
- etc…
理解しやすいコード
を実現するため
my @word_array = ( apple","banana","orange");
#コードA
my @arrayA = map { $_."good" } grep { $_ = /
banana/ } @word_array;
#コードB
my @arrayB;
for my word (@word_array) {
next if $word ne "banana";
push @arrayB, $word."good";
}
このコードの場合見る人の文化によって
読みやすさが変わると思う
最後に
良いコードの定義は変わるものです。今のプロジェクトで
使ってるコードが常に良いコードとは限りません。他の
会社では今使っているコードは推奨していないことだって
あり得ます。その時その時で一緒に開発する仲間と共に良
いコードとはなにか話して決めていくのがみんなが納得す
る理解しやすいコードづくりにつながると思います。

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リーダブルコード章:理解しやすいコードを読んだ考察