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• 使用 Object.create(null)就能创建一个没有原型链的纯对象

  <img src="/Users/izhaong/izhaong/Project_me/Blog/izhaong.com-localFile/1020015.js%20%E4%BD%BF%E7%94%A8%E6%8A%80%E5%B7%A7/image-20230124112700700.png" alt="image-20230124112700700" style="zoom: 50%;" />

• 正则表达式中 ^符号如果没有在[]中, 很可能代表的意思是一个空格