显示Perl中的所有文件
有多种方法可以使用Perl列出特定目录中的所有可用文件。首先，让我们使用简单的方法通过glob运算符获取并列出所有文件 -
#!/usr/bin/perl
# Display all the files in /tmp directory.
$dir = "/tmp/*";
my @files = glob( $dir );
foreach (@files ) {
print $_ . "\n";
}
# Display all the C source files in /tmp directory.
$dir = "/tmp/*.c";
@files = glob( $dir );
foreach (@files ) {
print $_ . "\n";
}
# Display all the hidden files.
$dir = "/tmp/.*";
@files = glob( $dir );
foreach (@files ) {
print $_ . "\n";
}
# Display all the files from /tmp and /home directories.
$dir = "/tmp/* /home/*";
@files = glob( $dir );
foreach (@files ) {
print $_ . "\n";
}这是另一个示例，它打开一个目录并列出该目录中所有可用的文件。
#!/usr/bin/perl
opendir (DIR, '.') or die "Couldn't open directory, $!";
while ($file = readdir DIR) {
print "$file\n";
}
closedir DIR;打印您可能使用的C源文件列表的另一个示例是-
#!/usr/bin/perl
opendir(DIR, '.') or die "Couldn't open directory, $!";
foreach (sort grep(/^.*\.c$/,readdir(DIR))) {
print "$_\n";
}
closedir DIR;