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Perl的开放者是否总是返回?
原标题:Should Perl s opendir always return . and .. first?
  • 时间:2010-04-16 15:41:52
  •  标签:
  • perl
  • opendir
  opendir MYDIR, "$dir";
  my @FILES = readdir MYDIR;
  closedir MYDIR;

阵列前两个条目中的99.9%似乎总是“”和“。 文字中后来的逻辑如果不真实,就会有问题。 我陷入了目录条目后来出现的情况。 这是否表明档案系统是腐败的还是其他的? 是否有公开的返回命令?

最佳回答

它始终符合操作系统秩序,是未经许可的。

虽然......和......经常是头两个条目,因为它们是头两个条目。 如果出于某种原因,其中之一被删除(通过非自然顺序删除,因为其通常被阻止),下个<代码>fs(或等值)将 固定<>> /em>该名录将重新编号。 名单稍后将列出其中一名名字。

因此,不光是“绕过头两个条目”。 相反,他们明确反对他们。

问题回答

命令由顾问办公室下达,并没有明确定义。

它们很容易过滤。

   opendir MYDIR, "$dir";
   my @FILES = grep !/^..?$/, readdir MYDIR  ;
   closedir MYDIR;




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