// Ex2
static string JoinThree(string a, string b, string c, StringJoin x)
{
string newString = x(a, b);
newString = x(newString, c);
return(newString);
}
static void Main(string[] args)
{
List <string> strings = new List <string> {
"a", "b", "c", "d"
};
List <int> numbers = new List <int> {
1, 2, 3, 4
};
StringJoin stringJoin = (a, b) => a + b;
StringJoin stringJoinWithDot = (a, b) => a + "." + b;
StringJoin stringJoinOnlyLast = (a, b) => b;
Console.WriteLine(stringJoin("Hello ", "Delegates"));
Console.WriteLine(JoinThree("a", "b", "c", stringJoin));
Console.WriteLine(JoinThree("a", "b", "c", stringJoinWithDot));
Console.WriteLine(JoinThree("a", "b", "c", stringJoinOnlyLast));
Console.WriteLine();
Console.WriteLine(JoinAllStrings(strings, stringJoin));
Console.WriteLine(JoinAllStrings(strings, stringJoinWithDot));
Console.WriteLine(JoinAllStrings(strings, stringJoinOnlyLast));
Console.WriteLine();
Join <int> numberJoin = (a, b) => a + b;
Join <int> numberJoinMultiply = (a, b) => a * b;
Join <string> stringJoins = (a, b) => a + "." + b;
Console.WriteLine(JoinList <int>(numbers, numberJoin));
Console.WriteLine(JoinList <int>(numbers, numberJoinMultiply));
Console.WriteLine(JoinList <string>(strings, stringJoins));
}
public string JoinThree(string str1, string str2, string str3, StringJoin join)
{
string newString;
newString = join(str1, str2);
newString = join(newString, str3);
return(newString);
}
public string JoinAllStrings(List <string> stringList, StringJoin joiner)
{
for (int i = 1; i < stringList.Count; i++)
{
stringList[0] = joiner(stringList[0], stringList[i]);
}
return(stringList[0]);
}
public string JoinAllStrings(List <string> strings, StringJoin join)
{
string newString = strings[0];
for (int i = 1; i <= strings.Count - 1; i++)
{
newString = join(newString, strings[i]);
}
return(newString);
}
// Opgave 4
// Define a method JoinAllStrings, parameterized by a list of strings and a
// StringJoin, which joins all strings in the list from left to right. For example:
public static string JoinAllStrings(List <string> strings, StringJoin str)
{
var res = "";
while (strings.Count > 1)
{
strings[0] = str(strings[0], strings[1]);
strings.RemoveAt(1);
}
return(strings[0]);
}
static int Main()
{
StringJoin test = new StringJoin();
TestFramework.BeginTestCase("String.Join");
if (test.RunTests())
{
TestFramework.EndTestCase();
TestFramework.LogInformation("PASS");
return(100);
}
else
{
TestFramework.EndTestCase();
TestFramework.LogInformation("FAIL");
return(0);
}
}
// Ex3
static string JoinAllStrings(List <string> strings, StringJoin x)
{
bool isFirst = true;
string newString = "";
foreach (string item in strings)
{
if (isFirst)
{
newString = item;
}
else
{
newString = x(newString, item);
}
isFirst = false;
}
return(newString);
}
static int Main()
{
StringJoin test = new StringJoin();
TestFramework.BeginTestCase("String.Join");
if (test.RunTests())
{
TestFramework.EndTestCase();
TestFramework.LogInformation("PASS");
return 100;
}
else
{
TestFramework.EndTestCase();
TestFramework.LogInformation("FAIL");
return 0;
}
}
public void Merge(StringJoin Group)
{
this.intermediateResult.Append(Group.intermediateResult);
}
public string JoinThree(string s1, string s2, string s3, StringJoin joiner)
{
return(joiner(joiner(s1, s2), s3));
}
private string JoinAllStrings(List <string> l, StringJoin f, int startIndex) => JoinAll(l, (v1, v2) => f(v1, v2), startIndex);
public string JoinAllStrings(List <string> l, StringJoin f) => JoinAllStrings(l, f, 0);
public string Join3(string s1, string s2, string s3, StringJoin f) => f(s1, f(s2, s3));
// Opgave 3
public static string Join3(string l, string r, string w, StringJoin str)
{
string res = str(l, r);
return(str(res, w));
}