chapter 8

Question 1

besides \d which stands for a single digit, what else is this called?

Answer 1

\d is one of many abbreviations in special code called regular expressions.

Question 2

what does the dot mean when it comes to regular expressions? and how does this relate to findWithinHorizon method?

Answer 2

when it comes to regular expressions, a dot stands for any character at all. so findWithinHorizon(“.”, 0) tells the computer to find the next character of any kind that the user types on the keyboard

Question 3

in the method findWithinHorizon(“.”, 0); what does the zero stand for?

Answer 3

it means that the method will search will search until the end of the input. so if