superset makeSingleton 源码
superset makeSingleton 代码
文件路径：/superset-frontend/packages/superset-ui-core/src/utils/makeSingleton.ts
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
interface ClassInterface<T, Args extends unknown[]> {
new (...args: Args): T;
}
export default function makeSingleton<T, Args extends unknown[]>(
BaseClass: ClassInterface<T, Args>,
...args: Args
): () => T {
let singleton: T;
return function getInstance() {
if (!singleton) {
singleton = new BaseClass(...args);
}
return singleton;
};
}
相关信息
相关文章
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
8、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦