19 \end{center} |
19 \end{center} |
20 |
20 |
21 If you want to follow the code I present during the |
21 If you want to follow the code I present during the |
22 lectures, read the handout about Scala. |
22 lectures, read the handout about Scala. |
23 |
23 |
24 \item {\bf (Optional)} Have a look at the crawler programs. |
24 %\item {\bf (Optional)} Have a look at the crawler programs. |
25 Can you find a usage for them in your daily programming |
25 % Can you find a usage for them in your daily programming |
26 life? Can you improve them? For example in cases there |
26 % life? Can you improve them? For example in cases there |
27 are links that appear on different recursion levels, the |
27 % are links that appear on different recursion levels, the |
28 crawlers visit such web-pages several times. Can this be |
28 % crawlers visit such web-pages several times. Can this be |
29 avoided? Also, the crawlers flag as problematic any page |
29 % avoided? Also, the crawlers flag as problematic any page |
30 that gives an error, but probably only 404 Not Found |
30 % that gives an error, but probably only 404 Not Found |
31 errors should be flagged. Can you change that?) |
31 % errors should be flagged. Can you change that?) |
32 |
32 |
33 \item Read the handout of the first lecture and the handout |
33 \item Read the handout of the first lecture and the handout |
34 about notation. Make sure you understand the concepts of |
34 about notation. Make sure you understand the concepts of |
35 strings and languages. In the context of the CFL-course, |
35 strings and languages. In the context of the CFL-course, |
36 what is meant by the term \emph{language}? |
36 what is meant by the term \emph{language}? |