internal static ImmutableArray <TValue> Flatten <TKey, TValue>(
this Dictionary <TKey, ImmutableArray <TValue> > dictionary,
IComparer <TValue> comparer = null)
{
if (dictionary.Count == 0)
{
return(ImmutableArray <TValue> .Empty);
}
ArrayBuilder <TValue> builder = ArrayBuilder <TValue> .GetInstance();
foreach (KeyValuePair <TKey, ImmutableArray <TValue> > kvp in dictionary)
{
builder.AddRange(kvp.Value);
}
if (comparer != null && builder.Count > 1)
{
// PERF: Beware ImmutableArray<T>.Builder.Sort allocates a Comparer wrapper object
builder.Sort(comparer);
}
return(builder.ToImmutableAndFree());
}
