arrays - 如何从 Perl 数组中只提取我想要的元素？

Question

嘿，我想知道如何让这段代码工作。基本上我想保留 $filename 的行只要它们包含 $user在路径中:

        open STDERR, ">/dev/null";
        $filename=`find -H /home | grep $file`;
        @filenames = split(/\n/, $filename);
        for $i (@filenames) {
            if ($i =~ m/$user/) {
                #keep results
            } else {
                delete  $i; # does not work.    
            }
        }
        $filename = join ("\n", @filenames);
        close STDERR;

我知道你可以删除像 delete $array[index]但我没有我所知道的这种循环的索引。

Answer 1

您可以将循环替换为:

@filenames = grep /$user/, @filenames;