You can use the join function to join arrays by specifying a delimiter.
my $joined = join(',', @array);
The first argument is the delimiter. In this example, a comma is specified as the delimiter. The strings contained in the array given in the second and subsequent arguments are combined with a delimiter.
See the following simple example. Here is a simple example of how to use the join function. CSV data is created by concatenating the strings contained in the array with commas.
# Create "Yuki, Toro, Kato" from an array my @names = ('Yuki', 'Taro', 'Kato'); my $names_csv = join(',', @names);
The delimiter can be anything, and the tab character "\t" is often used.
# Create "Yuki Toro Kato" from the array my @names = ('Yuki', 'Taro', 'Kato'); my $names_csv = join("\t", @names);
Strings rarely contain tabs, so they are often easier to work with than commas.
If you add a line break at the end, you can easily create one line of data separated by tabs.
my $line = join("\t", @names) . "\n";
Decompose to array by specifying delimiter
You can use split function to split into an array by doing the opposite of the join function, that is, by specifying a delimiter.
my @names = split(/,/, "Yuki, Taro, Kato");
Push function to add data to the array to join
If you want to add data to combine, you can use push function.
push @names, 'Kenta';
Example join function
This is an example that joins characters by "tab" using the join function.
use strict; use warnings; # Concatenate multiple strings with tabs my @animals = qw(cat dog sheep); my $line = join("\t", @animals);
Reference: qw() String concatenation operator