mirror of
https://github.com/ckaczor/azuredatastudio.git
synced 2026-02-01 09:35:41 -05:00
21 lines
633 B
TypeScript
21 lines
633 B
TypeScript
/*---------------------------------------------------------------------------------------------
|
|
* Copyright (c) Microsoft Corporation. All rights reserved.
|
|
* Licensed under the Source EULA. See License.txt in the project root for license information.
|
|
*--------------------------------------------------------------------------------------------*/
|
|
|
|
export function once<T extends Function>(this: any, fn: T): T {
|
|
const _this = this;
|
|
let didCall = false;
|
|
let result: any;
|
|
|
|
return function () {
|
|
if (didCall) {
|
|
return result;
|
|
}
|
|
|
|
didCall = true;
|
|
result = fn.apply(_this, arguments);
|
|
|
|
return result;
|
|
} as any as T;
|
|
} |