... expression /a.b/ is matched if the string contains a letter a, followed by any one single character (except the \n), followed by a letter b, whereas the expression / / matches any string containing ... represents an exact amount of occurrences; two numbers separated by a comma (e.g., {3,10}), represents an inclusive range; and a number followed by a comma (e.g., {4,}), represents a number of characters ... at least three characters. To match on a literal period, the dot metacharacter must be preceded by a backslash; for example, /love\./ matches on love. not lover. Example 12.17. _29*!a>*6b!(The...