private IEnumerable <string> GetLetterStrings(int n, FastRandom rand)
{
for (int i = 0; i < n; i++)
{
var value = StringValueGenerator.GetRandomLowerCaseString(rand.Next(3, 50 + 1), rand).ToCharArray();
for (int j = 0; j < value.Length; j++) // randomly add spaces with 20% probability at each position
{
if (rand.NextDouble() < 0.2)
{
value[j] = ' ';
}
}
string valueString = new String(value);
yield return(String.Join(" ", valueString.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries))); // remove double spaces and spaces in the beginnig and the end of the string
}
}
private IEnumerable <List <string> > GetCloseOrSuperAnagrams(int n, FastRandom rand)
{
// string with only letters! no other symbols
for (int i = 0; i < n; i++)
{
int length = rand.Next(1, 20 + 1);
string value0 = StringValueGenerator.GetRandomLowerCaseString(length, rand);
string value1 = ReplaceDropCharsAndShuffle(value0, rand);
yield return(rand.NextDouble() < 0.2 // bias towards value1 first, since value0.Length >= value1.Length
? new List <string>()
{
value0, value1
}
: new List <string>()
{
value1, value0
});
}
}