Dumper--随时随地的检测你的数据

先声明包:

use Data::Dumper;

 

然后将你要查看的数据放入如下语句中，例如查看数据为$test:

Data::Dumper->Dump([$test]);

 

warn "Data::Dumper->Dump([$test])";

查看结果输出(动态输出错误日志)：

tail -f  /PATH/error_log

 

EX.  tail -f /app/local/logs/error_log

 

再给出一些别人的范例：

 

   use Data::Dumper;

    # simple procedural interface    print Dumper($foo, $bar);

    # extended usage with names    print Data::Dumper->Dump([$foo, $bar], [qw(foo *ary)]);

    # configuration variables    {      local $Data::Dump::Purity = 1;      eval Data::Dumper->Dump([$foo, $bar], [qw(foo *ary)]);    }

    # OO usage    $d = Data::Dumper->new([$foo, $bar], [qw(foo *ary)]);       ...    print $d->Dump;       ...    $d->Purity(1)->Terse(1)->Deepcopy(1);    eval $d->Dump;