Question

Can anybody tell me what pattern do I need to write in the bind expression if I want to check whether the string contains aaa or aab or a?

$str = "Hello how are aaa you?";
print $str =~ m/what should i write here?/;

Answer 1

$str =~ /a|aaa|aab/

You might want to check the regular operator precedence to make sure you don’t get caught by things like /^foo|bar$/ (matches ^foo or bar$, contrast with ^(foo|bar)$).