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Perl 6Advent Calendar 2017

Day 7

Advent of Code day4をPerl 6で

Posted at

こんにちは、7日目の投稿になります。
例によって投稿者がいなかったので、Advent of Code day4の私の回答を貼っておきます。

use v6;                                                                                                                                                
                                                                                                                                                       
say +$*IN.lines>>.split(" ", :skip-empty)\                                                                                                             
.grep(-> @a { +Set(@a) == +@a  }); # (#1)
  • ポイント
    • -> @aでいったん@sigilの変数に代入を行い、2回目の呼び出し(+@aに相当する処理)の時にすでに消費されてしまっていて使えなくなるのを防ぎます (#1)

以上、7日目の投稿でした。

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