private static void TestMyDictionary()
{
MyWordDictionary d = new MyWordDictionary();
bool added = d.AddWord("Hello");
bool isValid = d.IsValidWord("Hello");
isValid = d.IsValidWord("Hell");
}
private static MyWordDictionary PopulateSomeWordsInDictionary()
{
MyWordDictionary d = new MyWordDictionary();
d.AddWord("be");
d.AddWord("beg");
d.AddWord("begun");
d.AddWord("cod");
d.AddWord("code");
return(d);
}
//Negative Test cases
// 1. Passing null string/empty string
// 2. position is negative
// 3. position reaching int.Max 2^31
// 4. string all aaaaaaaaaa, position > 1
// 5. All No-unique char string abcdefg, position >=1
// Positive test cases
// 1. one or more unique char , position is >=1 => String.Empty or a char
// 2. string with mixed case char x where it should skip to the next unique char
// 3. spaces ??
/*
* Given a string determine if it consist of valid concatenated words.
* "dogcatfish" --> true because it can be split int "dog","cat", and fish
* "dogecatfish" --> false
* */
public static bool AreAllValidWords(string inStr, MyWordDictionary dict)
{
if (string.IsNullOrEmpty(inStr))
{
return(false);
}
Mark[] P = new Mark[inStr.Length];
P[0].isWord = dict.IsValidWord(inStr, 0, 0);
for (int i = 1; i < inStr.Length; i++)
{
if (dict.IsValidWord(inStr, 0, i))
{
P[i].isWord = true;
P[i].sIdx = 0;
}
else
{
for (int j = 1; j <= i; j++)
{
if (P[j - 1].isWord && dict.IsValidWord(inStr, j, i))
{
P[i].isWord = true;
P[i].sIdx = j;
break;
}
}
}
}
//Now that P is populated, check that you have no gaps.
Mark m = P[inStr.Length - 1];
do
{
if (!m.isWord)
{
return(false);
}
else
{
m = P[m.sIdx - 1];
}
} while (m.sIdx > 0);
return(true);
}