PERL快速检查重叠间隔

Question

我正在尝试找到间隔的重叠。我有一个间隔1000至5000（例如，仅给出一个）。以下面给出的间隔检查这一点。该脚本确实有效，但非常缓慢，需要检查数千个间隔。有什么方法可以更快地做到这一点？谢谢

#!/usr/bin/perl
use warnings;
use strict;
use v5.16;
use List::MoreUtils qw/ any /;
my $start = 1000;
my $end   = 5000;
while ( my $line = <DATA> ) {
    chomp $line;
    my @element = split "t", $line;
    my @checking_array = "";
    for my $checking_no ( $element[0] .. $element[1] ) {
        push @checking_array, $checking_no;
    }
    for my $value ( $start .. $end ) {
        if ( any { $_ eq $value } @checking_array ) {
            print "$start to $end found in $linen";
            last;
        }
        else { next }
    }
}
__DATA__
780895  781139
3707570 3707794
13753925    13754168
2409582 2409790
6360880 6361084
8261045 8261250
4133539 4133772
7731897 7732188
8660252 8660539
12156253    12156504
9136875 9137168
16657849    16658107
5000    6000
4133539 4133772
7731897 7732188
8660252 8660539
4999    10000
12156253    12156504
3707570 3707794
13753925    13754168
2409582 2409790
6360880 6361084

输出：

1000 to 5000 found in 5000  6000
1000 to 5000 found in 4999  10000

Answer 1

您不需要边界之间的数字！只需检查边界即可。

         S---------E
 L-----H                      No overlap
      L-----H                 Overlap
           L-----H            Overlap
                L-----H       Overlap
                     L----H   No overlap
      L---------------H       Overlap

所以它们重叠，除非H＆lt; s或l＆gt; e。

while ( my $line = <DATA> ) {
    chomp $line;
    my ($lo, $hi) = split "t", $line;
    if ( $lo <= $end && $hi >= $start ) {
        print "$start to $end found in $linen";
    }
}

Answer 2

无需检查$start和$end之间的每个值；您可以简单地比较两个范围的限制。我认为此代码相当简单

#!/usr/bin/perl
use strict;
use warnings 'all';
my $start = 1000;
my $end   = 5000;
while ( my $line = <DATA> ) {
    my ($low, $high) = split ' ', $line;
    unless ( $high < $start or $low > $end ) {
        chomp $line;
        print qq{$start to $end found in "$line"n};
    }
}
__DATA__
780895  781139
3707570 3707794
13753925    13754168
2409582 2409790
6360880 6361084
8261045 8261250
4133539 4133772
7731897 7732188
8660252 8660539
12156253    12156504
9136875 9137168
16657849    16658107
5000    6000
4133539 4133772
7731897 7732188
8660252 8660539
4999    10000
12156253    12156504
3707570 3707794
13753925    13754168
2409582 2409790
6360880 6361084

输出

1000 to 5000 found in "5000    6000"
1000 to 5000 found in "4999    10000"