BookBuilder: make bids and asks readonly.

TaoTeChing · Apr 5, 2018 · 71de334 · 71de334
1 parent 178fbee
commit 71de334
Showing 1 changed file with 4 additions and 4 deletions.
diff --git a/src/lib/BookBuilder.ts b/src/lib/BookBuilder.ts
@@ -143,8 +143,8 @@ export class AggregatedLevelWithOrders extends AggregatedLevel implements PriceL
  */
 export class BookBuilder extends EventEmitter implements Orderbook {
     public sequence: number = -1;
-    protected bids: RBTree<AggregatedLevelWithOrders>;
-    protected asks: RBTree<AggregatedLevelWithOrders>;
+    protected readonly bids: RBTree<AggregatedLevelWithOrders> = PriceTreeFactory<AggregatedLevelWithOrders>();
+    protected readonly asks: RBTree<AggregatedLevelWithOrders> = PriceTreeFactory<AggregatedLevelWithOrders>();
     protected _bidsTotal: BigJS = ZERO;
     protected _bidsValueTotal: BigJS = ZERO;
     protected _asksTotal: BigJS = ZERO;
@@ -159,8 +159,8 @@ export class BookBuilder extends EventEmitter implements Orderbook {
     }
 
     clear() {
-        this.bids = PriceTreeFactory<AggregatedLevelWithOrders>();
-        this.asks = PriceTreeFactory<AggregatedLevelWithOrders>();
+        this.bids.clear();
+        this.asks.clear();
         this._bidsTotal = ZERO;
         this._asksTotal = ZERO;
         this._bidsValueTotal = ZERO;