Adapted from: Chapter 4 of Robert W. Sebasta, Programming the World-Wide Web, 3rd Edition, Addison Wesley, 2006. Supporting: Lecture 7.

Write, test and debug (if necessary) XHTML files that include JavaScript scripts for the following problems. When required to write functions, you must include a script to test the function with at least two different data sets.

1. Input: A text string, using prompt; Output: either legal name or Illegal name, depending on whether the input string fits the required format, which is: Last name, first name, middle initial where neither of the names can have more than 15 characters.
2. Input: A text string, using prompt; Output: The words of the input text, in alphabetical order
3. Function: tst_name; Parameter: a string; Returns: true if the given string has the form: string1, string2, letter where both strings must be all lowercase letters except the first letter, and letter must be uppercase; false otherwise.

Try these if you need or want more practice. All exercises are from Chapter 4 of Robert W. Sebasta, Programming the World-Wide Web, 3rd Edition, Addison Wesley, 2006.

1. Modify the script for Exercise 1.2 to get a second input from the user, which is either “ascending” or “descending”. Use this input to determine how to sort the input words.
2. Function: e_names; Parameter: An array of names, represented as strings. Returns: The number of names in the given array that end in either “e” or “y”.
3. Function: first_vowel; Parameter: A string. Returns: The position in the string of the leftmost vowel.
4. Function: reverser; Parameter: A number. Returns: The number with its digits in reverse order.

• Copy and paste the following text into the Target window of JRX

  The quick brown fox jumped over the lazy dog.
  
  Xooo
  oXoo
  ooXo
  oooX
  
  ABCDEFGHIJKLMNOPQRSTUVWXYZ
  abcdefghijklmnopqrstuvwxyz
  0123456789 `|\<>,./?#~'@;:[]{}=+-_)(*&^%$£"!
  
  555-789-1234
  
  some.one@swan.ac.uk
  
  Some wiki text with words in //italic// and **bold**. Like //this// or **that**.
  
  Alice was beginning to get very tired of sitting by her sister on the bank, and of having nothing to do: once or twice she had peeped into  
  the book her sister was reading, but it had no pictures or conversations in it, `and what is the use of a book,' thought Alice `without 
  pictures or conversation?'
  
  So she was considering in her own mind (as well as she could, for the hot day made her feel very sleepy and stupid), whether the pleasure 
  of making a daisy-chain would be worth the trouble of getting up and picking the daisies, when suddenly a White Rabbit with pink eyes ran 
  close by her.
  
  There was nothing so very remarkable in that; nor did Alice think it so very much out of the way to hear the Rabbit say to itself, `Oh 
  dear! Oh dear! I shall be late!' (when she thought it over afterwards, it occurred to her that she ought to have wondered at this, but at 
  the time it all seemed quite natural); but when the Rabbit actually took a watch out of its waistcoat-pocket, and looked at it, and then 
  hurried on, Alice started to her feet, for it flashed across her mind that she had never before seen a rabbit with either a waistcoat-
  pocket, or a watch to take out of it, and burning with curiosity, she ran across the field after it, and fortunately was just in time to 
  see it pop down a large rabbit-hole under the hedge. 

• Write regular expressions to match:
  1. any non-blank line of text.
  2. any word.
  3. the telephone number.
  4. “X” followed by up to two “o” characters
  5. one or more “o” character followed by “X”
  6. any upper case vowel
  7. any lowercase consonant
  8. any punctuation character
  9. The domain name of the email address.
  10. The user name of the email address.
  11. The words in italics in the wiki text.
  12. The start of each sentence in the quotation from Alice in Wonderland.

• Take any (or all) of the example JavaScript programs from the last three lectures and explore them in Firebug using the console, console logger and debugger.

More Homework Exercises