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Learn Red ? Fundamentals of Red
book

Learn Red ? Fundamentals of Red

by Ivo Balbaert
May 2018
Beginner content levelBeginner
252 pages
6h 19m
English
Packt Publishing
Content preview from Learn Red ? Fundamentals of Red

Questions

  1. Make a bitset to store all lowercase letters and another for all uppercase letters.
  2. Use union to make a bitset storing all alphanumerical characters.
  3. Use union to make a bitset storing all characters used in hexadecimal numbers.
  4. Make a rules pattern integer to match with integer numbers, starting optionally with a + or - sign.
  5. Make a pattern that matches the following product codes: "#ABC-nnnn" or  "#XYZ-nnnn", where nnnn is a four-digit pattern.
  6. Try for yourself to parse the data string to extract the exchange rate 0.81191502. (Hint: use some and the letter charset.)
  7. Starting with  rate: "<title>1 USD = 0.81191502 EUR</title>", change both tags to <rate> tags, by using two rules.
  8. Use parse and the code within it to obtain the ...
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Publisher Resources

ISBN: 9781789130706Supplemental Content