Binary file cws/cw01.pdf has changed
--- a/cws/cw01.tex Tue Nov 05 00:41:02 2019 +0000
+++ b/cws/cw01.tex Wed Nov 06 00:36:45 2019 +0000
@@ -245,9 +245,9 @@
(first line), 2011 (second line) and 2012 (third line) you obtain:
\begin{verbatim}
- List(List(Some(311.349976), Some(20.544939)),
- List(Some(300.222351), Some(31.638695)),
- List(Some(330.555054), Some(39.478039))))
+ List(List(Some(312.204773), Some(26.782711)),
+ List(Some(301.0466), Some(41.244694)),
+ List(Some(331.462585), Some(51.464207))))
\end{verbatim}\hfill[1 Mark]
Binary file pics/blow.png has changed
--- a/progs/lecture1.scala Tue Nov 05 00:41:02 2019 +0000
+++ b/progs/lecture1.scala Wed Nov 06 00:36:45 2019 +0000
@@ -5,10 +5,13 @@
// (their names should be lower case)
//====================================
+//var z = 9
+//z = 10
val x = 42
val y = 3 + 4
val z = x / y
+val x = 70
// (you cannot reassign values: z = 9 will give an error)
@@ -41,6 +44,7 @@
// ranges
1 to 10
(1 to 10).toList
+(1 to 10).toList.toString
(1 until 10).toList
@@ -69,9 +73,9 @@
List(1,2,3) == List(3,1,2)
-// this applies to "concrete" values...pretty much everything;
-// but for example you cannot compare functions (later),
-// and also not Arrays
+// this applies to "concrete" values...pretty much
+// everything; but for example you cannot compare
+// functions (later), and also not arrays
Array(1) == Array(1)
@@ -97,6 +101,7 @@
println(lst.mkString(", "))
// some methods take more than one argument
+
println(lst.mkString("{", ",", "}"))
// (in this case .mkString can take no, one,
@@ -166,7 +171,7 @@
// type errors
-math.sqrt("64")
+math.sqrt("64".toDouble)
// produces
//
@@ -193,6 +198,15 @@
// Function Definitions
//======================
+def foo(s: String) : String = {
+ val tmp = s ++ s ++ s
+ val res = s ++ s
+ res
+}
+
+
+foo("test")
+
def incr(x: Int) : Int = x + 1
def double(x: Int) : Int = x + x
def square(x: Int) : Int = x * x
@@ -205,15 +219,14 @@
str(3)
-// The general scheme for a function: you have to give a type
-// to each argument and a return type of the function
+// The general scheme for a function: you have to give a
+// type to each argument and a return type of the function
//
// def fname(arg1: ty1, arg2: ty2,..., argn: tyn): rty = {
-// body
+//
// }
-//
// BTW: no returns!!
// "last" line (expression) in a function determines the
// result
@@ -250,7 +263,6 @@
fact2(150)
-
def fib(n: Int) : Int =
if (n == 0) 1 else
if (n == 1) 1 else fib(n - 1) + fib(n - 2)
@@ -276,13 +288,13 @@
// For-Comprehensions (not For-Loops)
//====================================
-
+(1 to 10).toList
for (n <- (1 to 10).toList) yield {
square(n) + 1
}
for (n <- (1 to 10).toList;
- m <- (1 to 10).toList) yield m * n
+ m <- (1 to 10).toList) yield (m, n)
// you can assign the result of a for-comprehension
@@ -296,15 +308,20 @@
// the list/set/... can also be constructed in any
// other way
+
for (n <- Set(10,12,4,5,7,8,10)) yield n * n
+for (n <- (1 to 10)) yield {
+ n * n
+}
+
+if (1 == 2) "a" else "b"
// with if-predicates / filters
for (n <- (1 to 3).toList;
m <- (1 to 3).toList;
- if (n + m) % 2 == 0;
- if (n * m) < 2) yield (n, m)
+ if (n + m) % 2 == 0) yield (n, m)
for (n <- (1 to 3).toList;
m <- (1 to 3).toList;
@@ -330,13 +347,15 @@
// Functions producing multiple outputs
//======================================
-def get_ascii(c: Char) : (Char, Int) = (c, c.toInt)
+def get_ascii(c: Char) : (Char, Int) =
+ (c, c.toInt)
get_ascii('a')
// .maxBy, sortBy with pairs
-def get_length(s: String) : (String, Int) = (s, s.length)
+def get_length(s: String) : (String, Int) =
+ (s, s.length)
val lst = List("zero", "one", "two", "three", "four", "ten")
val strs = for (s <- lst) yield get_length(s)
@@ -356,7 +375,8 @@
for (n <- (1 to 10)) println(n)
-
+(1 to 10).toList
+(1 until 10).toList
// BTW: a roundabout way of printing out a list, say
val lst = ('a' to 'm').toList
Binary file slides/slides01.pdf has changed
--- a/slides/slides01.tex Tue Nov 05 00:41:02 2019 +0000
+++ b/slides/slides01.tex Wed Nov 06 00:36:45 2019 +0000
@@ -197,8 +197,8 @@
\multicolumn{2}{r@{}}{\footnotesize$^*$ source: Stackoverflow Developer Survey, 2019}
\end{tabular}
\end{center}
-\RIGHTarrow{2}{2.3}{5.45}
-\DOWNarrow{2}{10.1}{3.6}
+\RIGHTarrow{2}{2.4}{6.4}
+\DOWNarrow{2}{10.1}{4.4}
}
@@ -518,8 +518,7 @@
\item Preliminary Part 8: 4\% (27 November)
\item Preliminary Part 9: 4\% (5 December)
\end{itemize}\medskip
- \item Core Part: 35\% (15 January 2020)
-
+ \item Core Part: 35\% (15 January 2020)\bigskip
\end{itemize}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -766,7 +765,21 @@
\end{center}
\end{frame}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-\end{document}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\begin{frame}[t]
+
+\begin{center}
+\includegraphics[scale=0.4]{../pics/blow.png}
+\end{center}
+
+\begin{textblock}{14}(2,12.4)
+\Large\bf{}Mind-Blowing\\ Programming Languages: C/C++
+\end{textblock}
+\end{frame}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+
\end{document}
--- a/testing1/collatz.scala Tue Nov 05 00:41:02 2019 +0000
+++ b/testing1/collatz.scala Wed Nov 06 00:36:45 2019 +0000
@@ -7,11 +7,12 @@
object CW6a {
-def collatz(n: Long): Long =
+/*
+ * def collatz(n: Long): Long =
if (n == 1) 0 else
if (n % 2 == 0) 1 + collatz(n / 2) else
1 + collatz(3 * n + 1)
-
+*/
def collatz_max(bnd: Long): (Long, Long) = {
val all = for (i <- (1L to bnd)) yield (collatz(i), i)
@@ -30,6 +31,20 @@
*/
+
+
+def collatz(n: Long) : Long = {
+ if (n == 1) {
+ 1L
+ } else {
+ if (n % 2 == 0) {
+ collatz(n/2) + 1
+ } else {
+ collatz((n*3)+1) + 1
+ }
+ }
+}
+
}
--- a/testing1/drumb_test.sh Tue Nov 05 00:41:02 2019 +0000
+++ b/testing1/drumb_test.sh Wed Nov 06 00:36:45 2019 +0000
@@ -92,10 +92,10 @@
if [ $tsts -eq 0 ]
then
- echo -e " get_prices(List(\"GOOG\", \"AAPL\"), 2010 to 2012) ==" >> $out
- echo -e " List(List(Some(311.349976), Some(20.544939))," >> $out
- echo -e " List(Some(300.222351), Some(31.638695))," >> $out
- echo -e " List(Some(330.555054), Some(39.478039)))" >> $out
+ echo " get_prices(List(\"GOOG\", \"AAPL\"), 2010 to 2012) ==" >> $out
+ echo " List(List(Some(312.204773), Some(26.782711))," >> $out
+ echo " List(Some(301.0466), Some(41.244694))," >> $out
+ echo " List(Some(331.462585), Some(51.464207)))" >> $out
if (scala_assert "drumb.scala" "drumb_test3.scala")
then
--- a/testing1/drumb_test3.scala Tue Nov 05 00:41:02 2019 +0000
+++ b/testing1/drumb_test3.scala Wed Nov 06 00:36:45 2019 +0000
@@ -1,9 +1,10 @@
import CW6b._
-assert(get_prices(List("GOOG", "AAPL"), 2010 to 2012) ==
- List(List(Some(311.349976), Some(20.544939)),
- List(Some(300.222351), Some(31.638695)),
- List(Some(330.555054), Some(39.478039))))
-
+assert(get_prices(List("GOOG", "AAPL"), 2010 to 2012) ==
+ List(List(Some(312.204773), Some(26.782711)),
+ List(Some(301.0466), Some(41.244694)),
+ List(Some(331.462585), Some(51.464207))))
+
+
