Add values function to Collection interface

Author: micahscopes

src/data/collections/mutable/Collection.ts

@@ -14,6 +14,7 @@ type CollectionConfig = {
 interface Collection<T> {
     has(element: T): boolean;
     hasByHash(hash: Hash): boolean;
+    values(): IterableIterator<T>;
 }
 
 // WARNING: CausalCollection extends this class and uses some of its fields directly,

src/data/collections/mutable/MutableArray.ts

@@ -338,6 +338,10 @@ class MutableArray<T> extends BaseCollection<T> implements Collection<T> {
         return Array.from(this._hashes);
     }
 
+    values(): IterableIterator<T> {
+        return this.contents().values();
+    }
+
     lookup(idx: number): T {
         this.rebuild();
         return this._contents[idx];

src/data/collections/mutable/MutableSet.ts

@@ -7,7 +7,7 @@ import { HashReference } from 'data/model/immutable/HashReference';
 import { Logger, LogLevel } from 'util/logging';
 import { MultiMap } from 'util/multimap';
 import { ClassRegistry } from 'data/model';
-import { BaseCollection, CollectionConfig, CollectionOp } from './Collection';
+import { BaseCollection, Collection, CollectionConfig, CollectionOp } from './Collection';
 
 type ElmtHash = Hash;
 
@@ -164,7 +164,7 @@ class DeleteOp<T> extends CollectionOp<T> {
 
 }
 
-class MutableSet<T> extends BaseCollection<T> {
+class MutableSet<T> extends BaseCollection<T> implements Collection<T> {
 
     static className = 'hss/v0/MutableSet';
     static opClasses = [AddOp.className, DeleteOp.className];