Perlの組み込み関数 map の翻訳 - perldoc.jp
Evaluates the BLOCK or EXPR for each element of LIST (locally setting $_ to each element) and composes a list of the results of each such evaluation. Each element of LIST may produce zero, one, or more elements in the generated list, so the number of elements in the generated list may differ from that in LIST. In scalar context, returns the total number of elements so generated. In list context, r
Scripting Languages I: Node.js, Python, PHP, Ruby - Hyperpolyglot
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