reject() function

filter의 반대입니다. f가 falsy를 반환하는 모든 요소의 Iterable/AsyncIterable입니다.

Signature:

declare function reject<A, B extends A>(
  f: (a: A) => a is B,
  iterable: Iterable<A>,
): IterableIterator<A extends object ? ExcludeObject<A, B> : Exclude<A, B>>;

Example

const iter = reject((a) => a % 2 === 0, [0, 1, 2, 3, 4, 5, 6]);
iter.next(); // {done:false, value: 1}
iter.next(); // {done:false, value: 3}
iter.next(); // {done:false, value: 5}
iter.next(); // {done:true, value: undefined}

// with pipe
pipe(
  [0, 1, 2, 3, 4, 5, 6],
  reject((a) => a % 2 === 0),
  toArray,
); // [1, 3, 5]

await pipe(
  Promise.resolve([0, 1, 2, 3, 4, 5, 6]),
  reject((a) => a % 2 === 0),
  toArray,
); // [1, 3, 5]

// if you want to use asynchronous callback
await pipe(
  Promise.resolve([0, 1, 2, 3, 4, 5, 6]),
  toAsync,
  reject(async (a) => a % 2 === 0),
  toArray,
); // [1, 3, 5]

// with toAsync
await pipe(
  [
    Promise.resolve(0),
    Promise.resolve(1),
    Promise.resolve(2),
    Promise.resolve(3),
    Promise.resolve(4),
    Promise.resolve(5),
    Promise.resolve(6),
  ],
  toAsync,
  reject((a) => a % 2 === 0),
  toArray,
); // [1, 3, 5]

Try It

see pipe, toAsync, toArray

Open Source Code