请问复制数组后,不能打印$array里面的值的吗???谢谢!!

havocor

code:
my @mrna1 = @{$mrna{$tid}};
26                 print "array of mrna is \n";
27                 print Dumper @mrna1;
28 #               chomp $mrna1[8];
29                 print "mrna[8] is $mrna1[8] \n";


输出:
tid is AGAP004677-RB
array of mrna is
$VAR1 = [
          '2L',
          'VectorBase',
          'mRNA',
          '157348',
          '186936',
          '.',
          '-',
          '.',
          'ID=AGAP004677-RB;GeneID=AGAP004677;'
        ];
报错:
Use of uninitialized value in concatenation (.) or string at parsegff_aga.pl line 29, <I> line 750.

jason680

code:
my @mrna1 = @{$mrna{$tid}};
26                 print "array of mrna is \n";
27            ...
havocor 发表于 2011-07-28 11:08

warning with " uninitialized value"

try this one
$mrna1[0]->[8]

xxhacker

1. 
   
2. #! /usr/bin/perl
   
3. use warnings;
   
4. use strict;
   
5. 
   
6. my %hash = (
   
7.         test =>['1','.','2','3'],
   
8. );
   
9. my @array = @{$hash{test}};
   
10. print $array[3];
    

复制代码

这个是没有问题的
你29行写错了吧？ 29                 print "mrna[8] is $mrna1[8] \n";
print "$mrna[8] is $mrna1[8] \n";

Kitaisky

print "mrna[8] is ${$mrna1}[8]", "\n";

havocor

回复 2# jason680


    thank u ,jason!
虽然只有一个数组,但是还是要标明是第一个数组才起作用的~