Perl:匹配模式后如何打印下一行？

Question

我想在匹配图案或线后打印特定数据.我有这样一个文件:

#******************************    
List : car  
Design: S  
Date: Sun 10:10  
#******************************

b-black  
g-green
r-red  

Car Type              No.           color  
#-------------------------------------------    
N17              bg099            g  
#-------------------------------------------    
Total 1 car  

#****************************** 
List : car  
Design: L  
Date: Sun 10:20  
#******************************

b-black  
g-green
r-red  

Car Type            No.            color   
#-------------------------------------------    
A57            ft2233            b  
#-------------------------------------------    
Total 1 car  

#******************************    
List : car  
Design: M  
Date: Sun 12:10  
#******************************    

b-black  
g-green
r-red  

Car Type           No.             color  
#-------------------------------------------    
L45            nh669             g   
#-------------------------------------------    
Total 1 car  

#. .    
#. .     
#.    
#.    

我想打印数据,例如在"Type ...."行后面,并用"------"作为N17和bg099.我试过这个,但它无法正常工作.

my @array;    

While (@array = <FILE>) {    

foreach my $line (@array) {    

if ($line =~ m/(Car)((.*))/) {      

my $a = $array[$i+2];    
push (@array, $a);    
}  

if ($array[$i+2] =~ m/(.*)\s+(.*)\s+(.*)/) {    
my $car_type = "$1";      
print "$car_type\n";      
}      
}    
}    

预期产出:

Car Type            No.  
   N17             bg099  
   A57             ft2233    
   L45             nh669  
   ..              ..  
   .               . 

Answer 1

while (<FILE>) { #read line by line
    if ($_ =~ /^Car/) { #if the line starts with 'Car'
        <FILE> or die "Bad car file format"; #read the first line after a Car line, which is '---', in order to get to the next line
        my $model = <FILE>; #assign the second line after Car to $model, this is the line we're interested in.

        $model =~ /^([^\s]+)\s+([^\s]+)/; #no need for if, assuming correct file format #capture the first two words. You can replace [^\s] with \w, but I prefer the first option.
        print "$1 $2\n";
    }
}

或者如果您更喜欢更紧凑的解决方案:

while (<FILE>) { 
    if ($_ =~ /^Car/) { 
        <FILE> or die "Bad car file format"; 
        print join(" ",(<FILE> =~ /(\w+)\s+(\w+)/))."\n";
    } 
}