public IEnumerator<Node> GetDepthFirstTraversalEnumerator() {
yield return this.value;
foreach(Node child in this.children) {
IEnumerator<Node> enum_ = kidchildGetDepthFirstTraversalEnumerator();
while(enum_.MoveNext()) {
yield return enum_.Current;
}
}
}
and also found the map function from other laungauges:
public delegate object MapFunction(object o);
public static IEnumerable Map(MapFunction mapFunction, IEnumerable enumerable) {
foreach(object o in enumerable) {
yield return mapFunction(o);
}
}
public static IEnumerable PositiveIntegers() {
int a = 1;
while(true) {
yield return a;
a = a + 1;
}
}
public static IEnumerable SubList(int start, int end, IEnumerable enumerable) {
int count = 0;
foreach(object o in enumerable) {
count++;
if(count < start) {
continue;
} else if(count <= end) {
yield return o;
} else {
yield break;
}
}
}
IEnumerable set = I.SubList(5, 15, I.PositiveNumbers());
foreach(int value in Map(delegate(object o) { return ((int)o) * 2; }, )) {
//do something
}
heres the link to a Fibonacci generator
http://www.cerkit.com/cerkitBlog/2004/06/30/Using+The+Yield++Statement+In+Whidbey+C.aspx
a lazy paged collection:
http://haacked.com/archive/2006/08/14/FunIteratingPagedCollectionsWithGenericsAndIterators.aspx
and a textreader:
http://blogs.msdn.com/jmstall/archive/2005/08/08/textreader_yield.aspx
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