CSC152 2005S, Class 8: Strings, Continued

Admin:
* Attendance:
* Reading (available now): Numbers
* Handouts

Overview:
* Q and A
* Lab
* Reflection

Q and A
* What about backslashes?  Interesting but problematic
  * In Scheme, how would I get the string (Sam says "Hello")
    * Brute force: (string #\S #\a #\m #\space #\s #\a #\y #\s #\space #\" ...)
    * Use an apostrophe (whoops ... that gives a symbol, not a character)
    * You are permitted to put a backslash before a " in the middle of a string: "Sam says \"Hello\""
* Problem: Backslash now has two potential meanings:
  * Backslash
  * Prefix to a special character
* We eliminate the first
* Hence, to get the backslash character, we use \\

If you haven't finished the lab, try to do so this weekend!
* Tutors, Sunday 9-10 p.m.

Hey, Sam, how do I get the first name?
* Brute force, using only what you know so far (cleverly)
	String allInfo = in.readLine();
	String lName = allinfo.substring(0,allinfo.indexof(":"));
	String allButLast = allinfo.substring(allinfo.indexof(":")).substring(1);
	String fName = allButLast.substring(0,allButLast.indexof(":"));
* Using some fancy math
	String allInfo = in.readLine();
	int firstcolon = allinfo.indexof(":");
	int secondcolon = allinfo.indexof(":", firstcolon+1);
	String lname = allinfo.substring(0,firstcolon);
	String fname = allinfo.substring(firstcolon+1,secondcolon);

Observation: N (intended) aspects to lab
* Learn how to use the particular Java thingy
* Learn why the designers at Sun chose to include particular methods
* Do some problem solving
* See some applications