相关疑难解决方法(0)

哪些字符可以用作Perl正则表达式的分隔符？m/re/,m(re)并且måreå似乎都工作,但我想知道所有的可能性.

如果我$myString用值声明了一个变量'3 '(注意空格).是否有任何函数可以删除返回值的空白区域.有点像SomeFun($myString) 回归'3'(没有白色空间).

#!C:\Perl\bin\perl.exe
use strict;
use warnings;
use Data::Dumper; 

my $fh = \*DATA; 

print Dumper parse_constant_spec( $fh ); 


# Parse a constant spec file. 
# Pass in a handle to process. 
# As long as it acts like a file handle, it will work. 
sub parse_constant_spec { 
    my $fh = shift; 

    my %spec; 

    # Until file is done: 
        # Read in a whole block 
    while( my $block = read_block($fh) ) { 

        # …

有没有办法在一行中做到这一点？

$x =~ s/^\s+//;
$x =~ s/\s+$//;

换句话说,从字符串中删除所有前导和尾随空格.