it-peekable

Allows peeking/pushing an iterable

About

Lets you look at the contents of an async iterator and decide what to do

Example

import peekable from 'it-peekable'

// This can also be an iterator, generator, etc
const values = [0, 1, 2, 3, 4]

const it = peekable(value)

const first = it.peek()

console.info(first) // 0

it.push(first)

console.info([...it])
// [ 0, 1, 2, 3, 4 ]
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Async sources must be awaited:

import peekable from 'it-peekable'

const values = async function * () {
  yield * [0, 1, 2, 3, 4]
}

const it = peekable(values())

const first = await it.peek()

console.info(first) // 0

it.push(first)

console.info(await all(it))
// [ 0, 1, 2, 3, 4 ]
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Install

$ npm i it-peekable
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Browser <script> tag

Loading this module through a script tag will make its exports available as ItPeekable in the global namespace.

<script src="https://unpkg.com/it-peekable/dist/index.min.js"></script>
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API Docs

• https://achingbrain.github.io/it/modules/it_peekable.html

License

Licensed under either of

• Apache 2.0, (LICENSE-APACHE / http://www.apache.org/licenses/LICENSE-2.0)
• MIT (LICENSE-MIT / http://opensource.org/licenses/MIT)

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.