compact() function

すべての null と undefined の値を削除した Iterable/AsyncIterable を返します。

Signature:

declare function compact<T extends Iterable<unknown> | AsyncIterable<unknown>>(
  iterable: T,
): ReturnIterableIteratorType<T, NonNullable<IterableInfer<T>>>;

Example

const iter = compact([0, 1, undefined, 3, null]);
iter.next(); // {done:false, value: 0}
iter.next(); // {done:false, value: 1}
iter.next(); // {done:false, value: 3}
iter.next(); // {done:true, value: undefined}

// with pipe
pipe([0, 1, undefined, 3, null], compact, toArray); // [0, 1, 3]

await pipe(Promise.resolve([0, 1, undefined, 3, null]), compact, toArray); // [0, 1, 3]

// with toAsync
await pipe(
  [
    Promise.resolve(0),
    Promise.resolve(1),
    Promise.resolve(undefined),
    Promise.resolve(3),
    Promise.resolve(null),
  ],
  toAsync,
  compact,
  toArray,
); // [0, 1, 3]

Try It

see pipe, toAsync, toArray

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