proposal-iterator-helpers

Methods for working with iterators in ECMAScript

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Methods for working with iterators in ECMAScript

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tc39/proposal-slice-notation · linked in 3 of the same discussions

Mentioned in the same Hacker News threads. That is not proof they are substitutes.

This week on Hacker News

Nov 8–Nov 15 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/15/2026, 9:28:18 AM UTC.

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HN mentions by year19 dated mentions

Observed mentions: 2019-04-09 00:36:01 UTC to 2024-11-04 19:35:37 UTC.

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Period	Start (UTC)	End (exclusive, UTC)	Mentions	Submissions	Comments
2019	2019-01-01 00:00:00 UTC	2020-01-01 00:00:00 UTC	3	0	3
2020	2020-01-01 00:00:00 UTC	2021-01-01 00:00:00 UTC	1	0	1
2021	2021-01-01 00:00:00 UTC	2022-01-01 00:00:00 UTC	4	2	2
2022	2022-01-01 00:00:00 UTC	2023-01-01 00:00:00 UTC	2	0	2
2023	2023-01-01 00:00:00 UTC	2024-01-01 00:00:00 UTC	5	0	5
2024	2024-01-01 00:00:00 UTC	2025-01-01 00:00:00 UTC	4	1	3

What Hacker News says

2 sources

bakkoting·Nov 7, 2022

There's an active proposal which would let you do exactly that, going for stage 3 (ready for implementations) at the end of the month: https://github.com/tc39/proposal-iterator-helpers

In Why would anyone need JavaScript generator functions?

WorldMaker·Jul 28, 2022

> Switch statements JS has had switch statements for a long time. Do you mean switch "expressions" that can be used inline? It's not pretty but JS has long supported that too using either eval() "hacks" or IIFEs: https://stackoverflow.com/questions/32451049/is-eval-the-onl... Do you mean pattern matching? There are two Stage 1 TC39 proposals with different approaches to it: More hands-on/direct: https://github.com/tc39/proposal-pattern-matching More indirect: https://github.com/tc39/proposal-do-expressions > list comprehensions There are several libraries with strong Iterator support today that while not syntactically gorgeous do great jobs at allowing you to write simple list operations. Off the top of my head are IxJS and iter-tools, but also classic mainstays like up to date versions of lodash and Ramda. There's a Stage 2 proposal to b

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ring more of them into "the standard library": https://github.com/tc39/proposal-iterator-helpers There's also a Stage 2 proposal for an operator to make the syntax generally nicer no matter the library: https://github.com/tc39/proposal-pipeline-operator > array slicing Array.prototype.slice() was added back in ES2015: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe... Array.prototype.at() was "just added" in ES2022 for unary (single argument) "slice" (ability to use negative indexes): https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe... If you prefer syntax to function calls, there's a Stage 1 proposal still live for that: https://github.com/tc39/proposal-slice-notation > better equality operators That ship has probably sailed. Most projects at this point just have linter rules to standardize everything to the more reliable "triple equals" (===, and !==). There are proposals for more structural equality functions in the standard library, though, for instance: https://github.com/tc39/proposal-array-equality

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