--- a/handouts/ho02.tex	Sat Dec 29 10:30:27 2018 +0000
+++ b/handouts/ho02.tex	Tue Feb 12 21:23:00 2019 +0000
@@ -6,22 +6,23 @@
 
 
 \begin{document}
-\fnote{\copyright{} Christian Urban, King's College London, 2014, 2015, 2016, 2017, 2018}
+\fnote{\copyright{} Christian Urban, King's College London, 2014, 2015, 2016, 2017, 2018, 2019}
 
 
 \section*{Handout 2 (Regular Expression Matching)}
 
 This lecture is about implementing a more efficient regular expression
 matcher (the plots on the right below)---more efficient than the
-matchers from regular expression libraries in Ruby, Python and Java
-(the plots on the left). The first pair of plots shows the running time
-for the regular expression $(a^*)^*\cdot b$ and strings composed of
-$n$ \pcode{a}s (meaning this regular expression actually does not
-match the strings). The second pair of plots shows the running time for
-the regular expressions $a^?{}^{\{n\}}\cdot a^{\{n\}}$ and strings
-also composed of $n$ \pcode{a}s (this time the regular expressions
-match the strings).  To see the substantial differences in the left
-and right plots below, note the different scales of the $x$-axes.
+matchers from regular expression libraries in Ruby, Python, JavaScript
+and Java (the plots on the left). For this consider some experimental
+data: The first pair of plots shows the running time for the
+regular expression $(a^*)^*\cdot b$ and strings composed of $n$
+\pcode{a}s (meaning this regular expression actually does not match
+the strings). The second pair of plots shows the running time for the
+regular expressions $a^?{}^{\{n\}}\cdot a^{\{n\}}$ and strings also
+composed of $n$ \pcode{a}s (this time the regular expressions match
+the strings).  To see the substantial differences in the left and
+right plots below, note the different scales of the $x$-axes.
 
   
 \begin{center}
@@ -41,11 +42,12 @@
     axis lines=left,
     width=5cm,
     height=5cm, 
-    legend entries={Java 8, Python},  
+    legend entries={Java 8, Python, JavaScript},  
     legend pos=north west,
     legend cell align=left]
 \addplot[blue,mark=*, mark options={fill=white}] table {re-python2.data};
 \addplot[cyan,mark=*, mark options={fill=white}] table {re-java.data};
+\addplot[red,mark=*, mark options={fill=white}] table {re-js.data};
 \end{axis}
 \end{tikzpicture}
 &