11. Metacharacters - The Character Class

• Here's the result:

    It is full of words with the letter "q" in them.
    Some words, like qintar, do not have a u after the q.
    Other words, like quartet, do have the letter u after the q!
    and some other special words, like Iraqi, and last but not least,
          

• What?? Where is the line with "Qantas" and "Iraq"? Why aren't they there?
• Well, Qantas doesn't match with that regex, because we asked for a lower case "q", and Qantas has an upper case "Q"!
• However, the line with Iraq in it is a little more obscure. While it does have the lower case "q" we asked for, that lower case "q" is the last character in the file, and so the

    [^u]
          

  can't match!
• Remember, it's trying to match any single character that is not the literal "u", so there must be some character to match!
• Negation of a character class is not the same thing as matching nothing in place of the class!