@cuppachino/type-space/dist/tuples/pop-by.d.ts

A collection of type utilities for TypeScript.

import type { Subtract } from '../math/subtract';
import type { UnknownArray } from '../unknown-array';
/**
 * Removes the last `N` elements from a tuple type. Does not return the removed types.
 *
 * @remarks Its worth noting `Pop`, `Push`, `Shift`, and `Unshift` are inspired by JS; however, the types are not 1:1 for design reasons. More information can be found in [README](
 * @example
 * ```
 * declare const tuple: ['d', 'a', 'v', 'i', 'd']
 * type Tuple = PopN<typeof tuple, 2> // ['d', 'a', 'v']
 * ```
 */
export type PopBy<T extends UnknownArray, N extends number> = T extends [
    ...infer U,
    any
] ? N extends 0 ? T : PopBy<U, Subtract<N, 1>> : T extends readonly [...infer U, any] ? N extends 0 ? T : PopBy<readonly [...U], Subtract<N, 1>> : T;