Usage

const add = ({ a = 0, b = 0, c = 0 }: { a?: number; b?: number; c?: number }) =>
  a + b + c;

const addPartial = partob(add, { a: 1 });
addPartial({ b: 2 }); // 3
addPartial({ b: 1, c: 5 }); // 7

Installation

CLI

npx atmx add helper partob

Manually

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

/**
* Like partial but for unary functions that accept a single object
* argument
*
* @example
* const add = (
*   {a = 0, b = 0, c = 0}: {
*     a?: number,
*     b?: number,
*     c?: number
*   }
* ) => a + b + c
*
* const addPartial = partob(add, { a: 1 })
* addPartial({ b: 2 }) // 3
* addPartial({ b: 1, c: 5 }) // 7
*/
export function partob<T, K, PartialArgs extends Partial<T>>(
fn: (args: T) => K,
argobj: PartialArgs,
): (restobj: Omit<T, keyof PartialArgs>) => K {
return (restobj) => fn({ ...argobj, ...restobj } as T);
}