mirror of
https://github.com/lensapp/lens.git
synced 2025-05-20 05:10:56 +00:00
45 lines
1.5 KiB
TypeScript
45 lines
1.5 KiB
TypeScript
/**
|
|
* Copyright (c) OpenLens Authors. All rights reserved.
|
|
* Licensed under MIT License. See LICENSE in root directory for more information.
|
|
*/
|
|
|
|
import * as array from "../utils/array";
|
|
|
|
/**
|
|
* A strict N-tuple of type T
|
|
*/
|
|
export type Tuple<T, N extends number> = N extends N
|
|
? number extends N
|
|
? T[]
|
|
: TupleOfImpl<T, N, []>
|
|
: never;
|
|
type TupleOfImpl<T, N extends number, R extends unknown[]> = R["length"] extends N
|
|
? R
|
|
: TupleOfImpl<T, N, [T, ...R]>;
|
|
|
|
/**
|
|
* Iterates over `sources` yielding full tuples until one of the tuple arrays
|
|
* is empty. Then it returns a tuple with the rest of each of tuples
|
|
* @param sources The source arrays
|
|
* @yields A tuple of the next element from each of the sources
|
|
* @returns The tuple of all the sources as soon as at least one of the sources is exausted
|
|
*/
|
|
export function* zip<T, N extends number>(...sources: Tuple<T[], N>): Iterator<Tuple<T, N>, Tuple<T[], N>> {
|
|
const maxSafeLength = Math.min(...sources.map(source => source.length));
|
|
|
|
for (let i = 0; i < maxSafeLength; i += 1) {
|
|
yield sources.map(source => source[i]) as Tuple<T, N>;
|
|
}
|
|
|
|
return sources.map(source => source.slice(maxSafeLength)) as Tuple<T[], N>;
|
|
}
|
|
|
|
/**
|
|
* Returns a `length` tuple filled with copies of `value`
|
|
* @param length The size of the tuple
|
|
* @param value The value for each of the tuple entries
|
|
*/
|
|
export function filled<T, L extends number>(length: L, value: T): Tuple<T, L> {
|
|
return array.filled(length, value) as Tuple<T, L>;
|
|
}
|