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  <blog_url>https://blog.kyanny.me/</blog_url>
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  <description>標準添付ライブラリ ipaddr を使う。 require 'ipaddr' IPAddr.new('192.168.0.0/24').to_range =&gt; #&lt;IPAddr: IPv4:192.168.0.0/255.255.255.255&gt;..#&lt;IPAddr: IPv4:192.168.0.255/255.255.255.255&gt; IPAddr.new('192.168.0.0/24').to_range.take(5) =&gt; [#&lt;IPAddr: IPv4:192.168.0.0/255.255.255.255&gt;, #&lt;IPAddr: IPv4:192.168.0.1/255.255…</description>
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  <provider_name>Hatena Blog</provider_name>
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  <published>2022-08-11 01:36:31</published>
  <title>Ruby: CIDR を IP アドレスのリストに変換する</title>
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  <url>https://blog.kyanny.me/entry/2022/08/11/013631</url>
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