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komagata
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Jul 7, 2024
05.wc/wc.rb
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| ENV['POSIXLY_CORRECT'] = '1' | ||
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| def count_lines | ||
| proc { |input| input.readlines.size } |
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メソッドの中でprocを使っているのは普通のメソッドとして他のシチュエーションで使いずらいのでちょっとトリッキーかもしれません。
メソッドを持ち運びたければmethodメソッドを使うとMethodオブジェクトに変換できます。
また、文字列を持ち運んで、実行するときに文字列をMethodオブジェクトに変換するのもいいかもしれません。
def hello(name)
puts "hello #{name}"
end
hello('world') # => hello world
puts method('hello') # => #<Method: Object#hello(name) method_call.rb:1>
method('hello').call('world') # => hello world
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