/**
 * Copyright 2019 Google Inc. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */ import { Observable } from "../types.js" ; typeparam param os returns export function zip < T1 , T2 > ( o1 , o2 ) ; export function zip < T1 , T2 , T3 > ( o1 , o2 , o3 ) ; export function zip < T > ( ... os ) ; export function zip < T > ( ... os ) { return new ReadableStream < T [ ] > ( { async start ( controller ) { const readers = os . map ( o => o . getReader ( ) ) ; while ( true ) { const values = await Promise . all ( readers . map ( r => r . read ( ) ) ) ; if ( values . some ( ( { done } ) => done ) ) { break ; } controller . enqueue ( values . map ( ( { value } ) => value ! ) ) ; } readers . forEach ( r => r . releaseLock ( ) ) ; controller . close ( ) ; } } , { highWaterMark : 0 } ) ; }