我有以下哈希结构
test => '/var/tmp $slot'
my $slot_number = 0; # just another variable.
然后我获取密钥的值并存储在名为$ test_command
的变量中现在我需要将$slot
中的$test_command
替换为另一个名为$slot_number
的变量
所以我正在尝试这个
$test_command =~ s/$slot/$slot_number/g; this does not work
$test_command =~ s/$slot/$slot_number/ee; does not work
$test_command =~ s/\$slot/\$slot_number/g; this does not work
预期输出应为
$test_command = /var/tmp 0
答案 0 :(得分:3)
这个怎么样? $test_command=~s/\$slot/$slot_number/g;
此代码:
my $slot_number = 5;
my $test_command = '/var/tmp $slot';
$test_command=~s/\$slot/$slot_number/g;
print "$test_command\n";
打印:
/var/tmp 5
如果要将其替换为值,则不希望转义第二个变量。
答案 1 :(得分:1)
你真是太近了!看看以下内容是否符合您的要求:
use strict;
use warnings;
my $test_command = '/var/tmp $slot';
my $slot_number = 0;
$test_command =~ s/\$slot/$slot_number/;
print $test_command;
<强>输出强>:
/var/tmp 0