Regular expression matching on text.
System.regex.match_result: Regular expression result object.make System.regex(regex): Construct new regular expression object.regex: Regular expression to use.case_insensitive: Is match case-insensitive?internal_regex_obj: match(str): Match regular expression on text.str: String to search.match(str, start): Match regular expression on text.str: String to search.start: Starting location to search.replace(str, replace_with): Replaces string matched by regular expression with another.str: String to manipulate.replace_with: String to replace with.replace(str, replace_with, max): Replaces string matched by regular expression with another.str: String to manipulate.replace_with: String to replace with.max: Maximum times to replace.split(str): Splits a string based on regular expression.str: String to split.split(str, max): Splits a string based on regular expression.str: String to split.max: Maximum results to return.