Usage

const add = (a: number, b: number) => a + b;

const addFive = partial(add, 5);

addFive(2); // => 7

Installation

CLI

npx atmx add helper partial

Manually

Copy and paste the following method into @/utils/helpers/undefined.ts:

/**
* This type produces the type array of `TItems` with all the type items
* in `TItemsToRemove` removed from the start of the array type.
*
*
* type T = RemoveItemsInFront<[number, number], [number]> // [number]
* type T = RemoveItemsInFront<[File, number, string], [File, number]> // [string]
*/
type RemoveItemsInFront<
TItems extends any[],
TItemsToRemove extends any[],
> = TItems extends [...TItemsToRemove, ...infer TRest] ? TRest : TItems;

/**
* Create a partial function by providing some (or all) of the
* arguments the given function needs.
*
* @example
* const add = (a: number, b: number) => a + b
*
* const addFive = partial(add, 5)
*
* addFive(2) // => 7
*/
export function partial<T extends any[], TA extends Partial<T>, R>(
fn: (...args: T) => R,
...args: TA
): (...rest: RemoveItemsInFront<T, TA>) => R {
return (...rest) => fn(...([...args, ...rest] as T));
}