Is there a way to make Perl regex searches case-insensitive?

Question

Example:

my $cities = qr/San Francisco|Los Angeles/;

The scalar $cities will match San Francisco and Los An

Answer 1

my $cities = qr/San Fransisco|Los Angeles/i;

Perl regular expression modifiers

Answer 2

It's not that you want to make the scalar $cities case-insensitive, but the regular expression it is referencing. Use the /i modifier.

my $cities = qr/San Fransisco|Los Angeles/i;

You may find it useful to read the Perl regular expression tutorial: perldoc perlretut.