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我有两个LinkedLists,我想将所有匹配LinkedListA的条件的元素移动到LinkedListB(LinkedListB不是空的,以此开始)。有任何想法吗?如何根据标准将元素从一个LinkedList移动到另一个LinkedList
我有两个LinkedLists,我想将所有匹配LinkedListA的条件的元素移动到LinkedListB(LinkedListB不是空的,以此开始)。有任何想法吗?如何根据标准将元素从一个LinkedList移动到另一个LinkedList
如果你从列表中移动到列表B的结束,试试这个方法:
// .Net 2.0 compatable
private static void moveFromFirstToSecond<T>(Predicate<T> match, LinkedList<T> first, LinkedList<T> second)
{
LinkedListNode<T> current = first.First;
while (current != null)
{
LinkedListNode<T> next = current.Next;
if (match(current.Value))
{
second.AddLast(current.Value); // second.AddLast(current) also works
first.Remove(current);
}
current = next;
}
}
// for strings that start with "W"
LinkedList<string> a = ...
LinkedList<string> b = ...
moveFromFirstToSecond(delegate(string toMatch)
{ return toMatch.StartsWith("W"); }, a, b);
或作为一个扩展的方法:
// .Net 3.5 or later
public static void MoveMatches<T>(this LinkedList<T> first, Predicate<T> match, LinkedList<T> other)
{
LinkedListNode<T> current = first.First;
while (current != null)
{
LinkedListNode<T> next = current.Next;
if (match(current.Value))
{
other.AddLast(current.Value); // other.AddLast(current) also works
first.Remove(current);
}
current = next;
}
}
// for strings that start with "W"
LinkedList<string> a = ...
LinkedList<string> b = ...
a.MoveMatches(x => x.StartsWith("W"), b);
将他们在哪里?到最后? – mquander 2009-04-30 16:50:41
订单无关紧要 – 2009-04-30 16:53:47