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  <author_name>Lhazan</author_name>
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  <blog_title>2277</blog_title>
  <blog_url>https://lhazan.hateblo.jp/</blog_url>
  <categories>
    <anon>javascript</anon>
    <anon>理解負債</anon>
  </categories>
  <description>Object.freezeに遭遇。 const CONFIG = Object.freeze({ VERSION:'1.4.7', TIME_ZONE:'Asia/Tokyo', URL:'https://example.com', num:3 }) そのままオブジェクトを凍結する。 constは再代入を防ぎ、Oject freezeは中身の書き換え、追加を防ぐと。 //constのみ function check(){ //1.constのみ const a = {value:1}; a.value = 999; console.log(`1.constのみ -&gt; a.value : ${a…</description>
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  <provider_name>Hatena Blog</provider_name>
  <provider_url>https://hatena.blog</provider_url>
  <published>2026-10-04 00:22:45</published>
  <title>理解負債003</title>
  <type>rich</type>
  <url>https://lhazan.hateblo.jp/entry/2026/10/04/002245</url>
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