42 lines
1.1 KiB
JavaScript
42 lines
1.1 KiB
JavaScript
/*---------------------------------------------------------------------------------------------
|
|
* Copyright (c) Microsoft Corporation. All rights reserved.
|
|
* Licensed under the MIT License. See License.txt in the project root for license information.
|
|
*--------------------------------------------------------------------------------------------*/
|
|
export class SetMap {
|
|
constructor() {
|
|
this.map = new Map();
|
|
}
|
|
add(key, value) {
|
|
let values = this.map.get(key);
|
|
if (!values) {
|
|
values = new Set();
|
|
this.map.set(key, values);
|
|
}
|
|
values.add(value);
|
|
}
|
|
delete(key, value) {
|
|
const values = this.map.get(key);
|
|
if (!values) {
|
|
return;
|
|
}
|
|
values.delete(value);
|
|
if (values.size === 0) {
|
|
this.map.delete(key);
|
|
}
|
|
}
|
|
forEach(key, fn) {
|
|
const values = this.map.get(key);
|
|
if (!values) {
|
|
return;
|
|
}
|
|
values.forEach(fn);
|
|
}
|
|
get(key) {
|
|
const values = this.map.get(key);
|
|
if (!values) {
|
|
return new Set();
|
|
}
|
|
return values;
|
|
}
|
|
}
|