private static RecursiveDictionary <TResult> SelectRecursive_ <TSource, TResult>(int depth,
TSource parent, TResult parentResult,
RecursiveDictionary <TSource> dictionary,
SelectRecursiveDelegate <TSource, TResult> selector)
{
var parentKvp = parent.PairWithValue(parentResult);
var value = dictionary
.Aggregate(
new KeyValuePair <
KeyValuePair <TResult, RecursiveDictionary <TResult> >,
KeyValuePair <TSource, TResult> >[] { },
(left, v) =>
{
var result = selector(depth, parentKvp,
left.SelectValues().ToArray(),
v.Key);
var subset = SelectRecursive_(depth + 1, v.Key, result, v.Value, selector);
var resultSet = result.PairWithValue(subset);
return(left.Append(resultSet.PairWithValue(v.Key.PairWithValue(result))).ToArray());
})
.SelectKeys()
.AsRecursive();
return(value);
}
public static RecursiveDictionary <TResult> SelectRecursive <TSource, TResult>(this RecursiveDictionary <TSource> dictionary,
SelectRecursiveDelegate <TSource, TResult> selector)
{
if (dictionary.IsDefault())
{
return(default(RecursiveDictionary <TResult>));
}
return(SelectRecursive_(0,
default(TSource), default(TResult),
dictionary,
selector));
}
