Python Challenge -- Level 3 -- Solution
Code
import tango.io.Stdout; import tango.text.Regex; void main () { char[] text = ""; Regex pattern = Regex("[^A-Z]([A-Z]{3}([a-z])[A-Z]{3})[^A-Z]"); foreach (Regex match; pattern.search(text)) Stdout.print(match.match(2)); Stdout.flush(); }
Explanation
char[] text = "";
The source text from the challenge page should be put between the quotes.
Regex pattern = Regex("[^A-Z]([A-Z]{3}([a-z])[A-Z]{3})[^A-Z]");
Create a new regular expression that does the following things:
- [^A-Z]
- The character must not be an uppercase letter.
- [A-Z]{3}
- There must be three uppercase letters in a row.
- [a-z]
- The character must be a lowercase letter.
- [A-Z]{3}
- There must be three uppercase letters in a row.
- [^A-Z]
- The character must not be an uppercase letter.
foreach (Regex match; pattern.search(text))
For every match of the pattern, execute the following code.
Stdout.print(match.match(2)); Stdout.flush();
Print the second tagged statement to the screen. The tagged statement are delimited by the parenthesis. Upon completion, the data is flushed.