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Home/ Questions/Q 4124734
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Editorial Team
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Editorial Team
Asked: May 20, 20262026-05-20T23:46:41+00:00 2026-05-20T23:46:41+00:00

I need to get the first ~50 words from a text for suplying exerpt

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I need to get the first ~50 words from a text for suplying exerpt to the users of my application.
I did the following:

use strict;use warnings;use utf8;
binmode(STDOUT, ':utf8');
my $text = <<TXT;
Регулярните изрази ни позволяват да търсим шаблони в данните си. 
Повечето букви и символи просто ще съвпадат със самите себе си. 
Например, регулярният израз "test" просто и точно ще съвпада със 
символния низ "test". Можете да включите режим, 
нечувствителен към разликата между малки и големи букви, който ще 
позволи да съвпадне също така и с "Test" или "TEST". Има изключения от 
това правило, някои символи са особени и не съвпадат със 
самите себе си. Вместо това те сигнализират... 
TXT

my $c = 0;
my $collected = substr($text, 0, 10);
while ($text =~ /$collected/) {
    $c += 10;
    $collected = substr($text, 0, $c);
    print $collected, $/;
    #sleep 1;
    my @words = split(/\s+/, $collected);

    if (@words >= 49) { last; }
}

this works fine but I am concerned about the efficiency of the code.

Imagine that I havto do the same for many, many texts.
There should be a smarter more perlish way, but I can not figure it out.

Thanks in advance.

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1 Answer

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  1. Editorial Team
    Editorial Team
    2026-05-20T23:46:42+00:00Added an answer on May 20, 2026 at 11:46 pm

    Try:

    #!/usr/bin/env perl
    
    use strict;
    use warnings;
    
    my $text = <<TXT;
    Регулярните изрази ни позволяват да търсим шаблони в данните си. 
    Повечето букви и символи просто ще съвпадат със самите себе си. 
    Например, регулярният израз "test" просто и точно ще съвпада със 
    символния низ "test". Можете да включите режим, 
    нечувствителен към разликата между малки и големи букви, който ще 
    позволи да съвпадне също така и с "Test" или "TEST". Има изключения от 
    това правило, някои символи са особени и не съвпадат със 
    самите себе си. Вместо това те сигнализират... 
    TXT
    
    my @words = $text =~ m/ \s* ( \S+ ) /gmsx;
    $#words = 49;
    print "@words\n";
    
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