Let's say you have multple lines of data in an array

my @foo = qw(
line 1
line 2
line 3
);

You can print the array.

print @foo;

And all of the lines will be printed.

line 1
line 2
line 3

Splice can be used to remove the first line from the array.

splice (@foo, 0, 1);

Now when you print the array, line 1 has been removed.

line 2
line 3