Usage

const a = { a: 1, b: undefined, c: 3 };
shake(a); // => { a: 1, c: 3 }

Installation

CLI

npx atmx add helper shake

Manually

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

/**
* Removes (shakes out) undefined entries from an object. Optional
* second argument shakes out values by custom evaluation.
*
* @example
* const a = { a: 1, b: undefined, c: 3 }
* shake(a) // => { a: 1, c: 3 }
*/
export function shake<T extends object>(
obj: T,
filter: (value: T[keyof T]) => boolean = (value) => value === undefined,
): T {
if (!obj) {
return {} as T;
}

const keys = Object.keys(obj) as (keyof T)[];

return keys.reduce((acc, key) => {
if (!filter(obj[key])) {
  acc[key] = obj[key];
}
return acc;
}, {} as T);
}