public static void ForRandomByOnce <T>(this IEnumerable <T> set, int count, Action <T> action)
{
var setCount = set.Count();
if (count >= setCount)
{
throw new Exception($"Selection count {count} more than item count {setCount}!");
}
var list = new System.Collections.Generic.List <T>(set);
var pointer = Int.ZERO;
while (pointer < count)
{
var item = list.GetRandom();
action.Invoke(item);
list.Remove(item);
pointer++;
}
}
public static T GetRandomWhile <T>(
this IEnumerable <T> set,
out bool isFound,
Func <T, bool> predicate
)
{
var list = new System.Collections.Generic.List <T>(set);
while (list.IsNotEmpty())
{
var item = list.GetRandom();
if (predicate(item))
{
isFound = true;
return(item);
}
list.Remove(item);
}
isFound = false;
return(default(T));
}
