Question

我知道这是Can't use string ("1") as a subroutine ref while "strict refs" in use的副本但我无法弄清楚调用表的问题是什么。代码似乎已执行，但日志中出现以下错误：Can't use string ("1") as a subroutine ref while "strict refs" in use at C:/filepath/file.pl line 15.

#! C:\strawberry\perl\bin\perl

use strict;
use warnings;
use Custom::MyModule;
use CGI ':standard'; 

my $dispatch_table = {
      getLRFiles => \&Custom::MyModule::getLRFiles,
      imageMod => \&Custom::MyModule::imageMod,
      # More functions
  };

my $perl_function = param("perl_function");
($dispatch_table->{$perl_function}->(\@ARGV) || sub {})->(); # Error occurs on this line

我不确定它是否与我使用自定义模块这一事实有关，而且它可能是愚蠢的，因为我对Perl并不是非常熟悉，但任何帮助都会受到赞赏！< / p>

Answer 1

($dispatch_table->{$perl_function}->(\@ARGV) || sub {})->();

与

相同

my $x = $dispatch_table->{$perl_function}->(\@ARGV);
($x || sub {})->(); # $x is probably not code ref

尝试，

($dispatch_table->{$perl_function} || sub {})->(\@ARGV);

或者

$_ and $_->(\@ARGV) for $dispatch_table->{$perl_function};

在使用“strict refs”时，不能使用字符串（“1”）作为子程序ref

1 个答案: