// Iterate through the list with two element look-ahead
// to implement rule 3
public static IEnumerable <ColorResult> Rule3(IEnumerable <ColorResult> input)
{
ColorResult color = null;
ColorResult ahead1 = null;
foreach (var ahead2 in input)
{
if ((color != null) && (color.Prob < 60f) &&
(ahead1 != null) && (ahead1.Prob >= 60f) &&
(ahead2 != null) && (ahead2.Prob >= 60f) &&
(ahead1.Name == ahead2.Name))
{
color.Name = ahead1.Name;
}
yield return(color);
color = ahead1;
ahead1 = ahead2;
}
// Using a null check here as a cheat way to test we've
// actually had two inputs.
// NB Will not preserve trailing nulls in the list;
// you'll need to count inputs if you need that.
if (color != null)
{
yield return(color);
}
if (ahead1 != null)
{
yield return(ahead1);
}
}
// Iterate through the list remembering the last two elements
// to implement rule 1
public static IEnumerable <ColorResult> Rule1(IEnumerable <ColorResult> input)
{
ColorResult last2 = null;
ColorResult last1 = null;
foreach (var color in input)
{
if ((color.Prob < 60f) &&
(last2 != null) && (last2.Prob >= 60f) &&
(last2 != null) && (last2.Prob >= 60f) &&
(last2.Name == last1.Name))
{
color.Name = last2.Name;
}
yield return(color);
last2 = last1;
last1 = color;
}
}
