Perl严格引用时不能使用字符串作为符号引用

Question

我需要以下Perl代码的一些指导.当我离开时no strict 'refs',sub工作正常.但如果no strict 'refs'删除,我收到错误消息:

Can't use string ("A") as a symbol ref while "strict refs" in use at test.pl

它在下面标记为"Here"的行中死亡.这sub需要从A..Z打开(写>)所有文件,并根据regexREAD文件(LOG)将输出写入相应的文件输出.

use strict;
use Text::CSV_XS;
no strict 'refs';  
...
...
sub file_split {

    my ( $i, $fh, @FH );
    my ( $file ) = @_;
    my ( @alpha) = ("A".."Z");

    for ( @alpha) {                            
            $fh = $_ ;
            open ( $fh,">","$_-$file" )  || die $!;      <--------- HERE
            push @FH, $fh;
    }

    my $csv = Text::CSV_XS->new( {  binary => 1,
                                    allow_whitespace => 1,
                                    allow_loose_escapes => 1,
                                    allow_loose_quotes =>1,
                                    escape_char => undef ,
                                    sep_char => ',',
                                    auto_diag=> 1
                                    } );
    open( LOG,"<", $file ) || die $!;
    while ( my $row = $csv->getline( *LOG ) ) {
            if ( $row->[0] =~ /^(\w)/ ) {
                    print $1                       <--------- HERE
                            "$row->[0]".",".
                            "$row->[1]" .",".
                            "$row->[2]" .",".
                            "$row->[3]" .",".
                            "$row->[4]".",".
                            "$row->[5]"."\n";

            } else {
                        print "Record skipped... --> $row->[0] <-- ... please verify     \n";
                }
    }
}

Answer 1

不要指定$fh = $_它没有做任何有用的事情.

@FH应该%FH而不是push尝试:

$FH{ $_ } = $fh

更换$1用$FH{ $1 }.

Answer 2

你要求perl在这里使用$ fh的值作为文件句柄的名称:

for ( @alpha) {                            
            $fh = $_ ;
            open ( $fh,">","$_-$file" )  || die $!;      <--------- HERE
            push @FH, $fh;
    }

您应该考虑使用词法变量并通过open将其自动生成文件句柄,然后将其存储在哈希中以便稍后获取:

for ( @alpha) {                            
            open ( my $fh,">","$_-$file" )  || die $!;
            $handles{$_} =  $fh;
}

这样你以后可以使用它:

while ( my $row = $csv->getline( *LOG ) ) {
            if ( $row->[0] =~ /^(\w)/ ) {
                    print $handles{$1}                       <--------- HERE
                            ...