Dokumenthantering VT98:03

These are the exercises for the first lab session of the course Dokumenthantering VT98. There are 3 exercises this week and 1 of them is obligatory. The obligatory exercises has been marked with a *.

• Exercises Lab 1
• Programming examples
• References Week 1

Write a report about the obligatory exercise. The report should contain at least:

• a description of the (obligatory) exercises you have made,
• an overview of the most important program design decisions you had to make (in there were any),
• one or more examples of running your program and
• the code you have written for these exercises (in an appendix).

The deadline for handing in the report for this week's exercises is Wednesday February 4, 1998.

Exercises Lab 1

Tip: Try out the examples from the lecture notes before you begin with the exercises. You can find the example code in the file /home/staff/web/priv/dh98/perl/01.all in the programming examples directory.

1. * Finish the Perl program for simulating the UNIX wc program 01.wc. The program only has to be able to process one file and no wc options have to be implemented. Compare the output of your program with the wc output.

2. Specify four different regular expressions that match lines containing
   • the string bar
   • one or more of the strings bar, ber and bor.
   • exactly two strings separated by white space
   • at least two copies of the same character in the range a-z

   You can test your regular expressions with the perl call:

   perl -e 'while (<>) { if (/X/) { printf; } }' < /corpora/Press65/UnixAscii/p65.001

   (the commend should be on a single line) by replacing the X with the regular expression. For this input file the command should produce 183, 495, 211 and 449 lines respectively.

3. Expand the Perl/Tk script with a button that kills the window when pressed.

References Week 1

http://stp.ling.uu.se/~erikt/dh97/refguide.ps

The Perl Reference Guide by Johan Vromans.

/usr/local/src/Tk-b11.02/Tk/UserGuide.html

A short Perl/Tk user guide with some programming examples.

/usr/local/src/Tk-b11.02/demos/widget

A demo program for Perl/Tk applications with source code.

http://www.activestate.com/

Page from which Perl for Windows can be downloaded.