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| import { asArray, asIter, chunks, map } from './iterator';
export interface CallbackFunc<T> {
(e: Error, r: T);
}
export type NodeAsyncCall<T> = {
(callback: CallbackFunc<T>);
} | {
(arg1: any, callback: CallbackFunc<T>);
} | {
(arg1: any, arg2: any, callback: CallbackFunc<T>);
} | {
(arg1: any, arg2: any, arg3: any, callback: CallbackFunc<T>);
} | {
(arg1: any, arg2: any, arg3: any, arg4: any, callback: CallbackFunc<T>);
} | {
(arg1: any, arg2: any, arg3: any, arg4: any, arg5: any, callback: CallbackFunc<T>);
} | {
(arg1: any, arg2: any, arg3: any, arg4: any, arg5: any, arg6: any, callback: CallbackFunc<T>);
} | {
(arg1: any, arg2: any, arg3: any, arg4: any, arg5: any, arg6: any, arg7: any, callback: CallbackFunc<T>);
} | {
(arg1: any, arg2: any, arg3: any, arg4: any, arg5: any, arg6: any, arg7: any, arg8: any, callback: CallbackFunc<T>);
} | {
(arg1: any, arg2: any, arg3: any, arg4: any, arg5: any, arg6: any, arg7: any, arg8: any, arg9: any, callback: CallbackFunc<T>);
};
export async function callbackToPromise<T>(func: NodeAsyncCall<T>, ...args: any[]): Promise<T> {
return new Promise<any>((res, rej) => {
const callback = (e: Error, ...results: any[]) => {
if (e) {
rej(e);
} else {
if (results.length === 0) {
res();
} else if (results.length === 1) {
res(results[0]);
} else {
res(results);
}
}
};
func.apply(null, [...args, callback]);
});
}
export async function whenAll<T, U>(tasks: U[], mapper: (x: U) => Promise<T>, Iparallelism: number = 10): Promise<T[]> {
let results = [];
for (const chunk of chunks(asIter(tasks), parallelism)) {
results = [...results, ...(await Promise.all(asArray(map(chunk, mapper))))];
}
return results;
}
|