Workshop

Workshop

Quiz

1:	What kind of data does this appear to be? 01/30/2005,05:02,PM,2264,Listing19_1.pl 01/26/2005,08:26,PM,541,Listing19_2.pm 01/26/2005,08:24,PM,301,Listing19_3.pm 01/27/2005,09:01,PM,773,Listing19_4.pm 01/27/2005,09:20,PM,154,Listing19_5.pl 01/27/2005,09:40,PM,164,Listing19_6.pl 01/27/2005,10:19,PM,233,Listing19_7.pl 01/30/2005,04:27,PM,92,Listing19_8.pl 01/30/2005,05:05,PM,693,Listing19_9.pm Unstructured Table data Binary data Hierarchical data
2:	What kind of data does this appear to be? Othello, The Moor of Venice Dramatis Personae Act I Scene 1: Venice, A street. Scene 2: Another street. Scene 3: Council chamber Act II Scene 1: Sea port in Cyprus Scene 2: Street Scene 3: Hall in the castle Unstructured Table data Binary data Hierarchical data
3:	What kind of data does this appear to be? There once was a man from Nantucket, Who kept all of his cash in a bucket, But his daughter, named Nan, Ran away with a man, And as for the bucket, Nantucket... (Published in the Princeton Tiger, 1924) Unstructured Table data Binary data Hierarchical data Other

Answers

A1:	(b) This is table data, specifically a format called Comma Separated Value, or CSV. It's a common data-interchange format, and many tools including Microsoft Excel deal with it quite well.
A2:	(d) This is hierarchical data. The meaning of each line depends heavily on where it appears within the outline. Where the scenes appear changes the meaning of the document.
A3:	(a) Unstructured. As far as this hour is concerned, this is unstructured data. To be fair though, this is an example of limerick, and limericks have a definite structure. Answering (e) Other will get you partial credit.

Activities

• The functions that were written in this chapter—read_data, add_descriptions, print_order, and read_bulk—are very well suited for object-oriented programming. Design an object-oriented module that:

  • Has one constructor that takes a mail message and returns an Order object.

  • Has a function that takes an XML filename and returns an array of Order objects.

  • Has add_descriptions and print_order as methods for the Order object.