compact

compact() function

Returns Iterable/AsyncIterable with all null and undefined values removed.

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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