我在遍历文件名时遇到了问题,我的输入数组元素被删除了。
代码:
use Data::Dumper;
use warnings;
use strict;
my @files = ("file1", "file2", "file3");
print Dumper(\@files);
for (@files) {
my $filename = $_ . '.txt';
open(my $fh, '<:encoding(UTF-8)', $filename)
or die "Could not open file '$filename' $!";
while(<$fh>) {
print "$filename read line \n";
}
}
print Dumper(\@files);
输出:
$VAR1 = [
'file1',
'file2',
'file3'
];
file1.txt read line
file2.txt read line
file3.txt read line
$VAR1 = [
undef,
undef,
undef
];
文件内容:
cat file1.txt
asdfsdfs
cat file2.txt
iasdfasdsf
cat file3.txt
sadflkjasdlfj
为什么数组内容会被删除? (我有两种不同的解决方法,但我想了解这段代码的问题在哪里。)