perl function glob

The glob function is a built-in Perl function that is used to expand filenames using shell-like globbing patterns. It takes a pattern as its argument and returns a list of filenames that match the pattern.

Here's an example that demonstrates how to use glob:

#!/usr/bin/perl

use strict;
use warnings;

# Get a list of all files in the current directory
my @files = glob("*");

# Print the list of files
foreach my $file (@files) {
    print "$file\n";
}

In this example, we use the globbing pattern * to match all files in the current directory. We pass the pattern to the glob function, which returns a list of filenames that match the pattern. We assign the list to the variable @files and then print each filename to the console using a foreach loop.

Here's another example that demonstrates how to use more complex globbing patterns:

#!/usr/bin/perl

use strict;
use warnings;

# Get a list of all text files in the current directory and its subdirectories
my @files = glob("**/*.txt");

# Print the list of files
foreach my $file (@files) {
    print "$file\n";
}

In this example, we use the globbing pattern **/*.txt to match all text files in the current directory and its subdirectories. The ** wildcard matches any number of subdirectories, and the *.txt wildcard matches any file with a .txt extension. We pass the pattern to the glob function, which returns a list of filenames that match the pattern. We assign the list to the variable @files and then print each filename to the console using a foreach loop.