proposals
proposal-array-grouping
proposals | proposal-array-grouping | |
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15 | 19 | |
433 | 513 | |
0.2% | - | |
0.0 | 0.0 | |
over 2 years ago | 5 months ago | |
HTML | ||
- | MIT License |
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proposals
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An intro to TSConfig for JavaScript Developers
target - Specifies the ECMAScript target version for the emitted JavaScript. Defaults to ES3. To ensure maximum compatibility, set this to the lowest version that your code requires to run. ESNext setting allows you to target the latest supported proposed features.
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Writing RFCs
TC39
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Pipeline Operator great again!
Current Status: You'd have to check the TC39 proposals repository or the official proposal text for the most recent status. As of my last update, it had not yet reached Stage 4 (final stage) of the TC39 process, which means it wasn't part of the ECMAScript specification yet.
- Set methods proposal reaches stage 3
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Upcoming ECMAScript features I'm excited about
More proposals can be found on the official GitHub page.
- What to learn in 2022
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Updates from the 89th TC39 meeting
There were a couple of other proposals that made stage 1 too, can see here.
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Don't make me think, or why I switched to Rails from JavaScript SPAs
The working group most in charge of JS is ECMA's TC-39 (TC => Technical Committee) [0]. They've been taking a very deliberate, slow path to expanding the "standard" library because they take a very serious view of backwards compatibility on the web. Some proposals were shifted because of conflicts with ancient versions of things like MooTools still out in the wild, for instance. (This was the so-called "Smooshgate" incident [1].)
This may speed up a bit if the Built-In Modules proposal [2] passes, which would add a deliberate `import` URL for standard modules which would give a cleaner expansion point for new standard libraries over adding more global variables or further expanding the base prototypes (Object.prototype, Array.prototype, etc) in ways that increasingly likely have backwards compatibility issues.
TC-39 works all of their proposals in the open on Github [3] and it can be a fascinating process to watch if you are interested in the language's future direction.
[0] https://tc39.es/
[1] https://developers.google.com/web/updates/2018/03/smooshgate
[2] https://github.com/tc39/proposal-built-in-modules
[3] https://github.com/tc39/proposals
- O que são RFCs e como elas funcionam na linguagem PHP
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Ask HN: Where are the resources for complex architectures for Node.js?
My biggest pointer would be to remember that Java & JavaScript aren't named that way by coincidence. They're two different approaches to a similar problem. Java suffers from Enterprise Development (eg: Enterprise FizzBuzz[0]), JavaScript suffers from Ultimate Accessibility (eg: how many questions on Stack Overflow conflated jQuery and JS?).
> How should exceptions be managed? [...] Has there been a debate about best practice? Where can I find it?
I suggest you handle the errors you can and otherwise let it crash.[1][2] Debates in NodeJS-land have steered towards more monadic/Result-like structures and working synchronous-looking try/catch onto async/await. NodeJS and its various components are open source, you'll have a lot of luck looking around on GH for issues & PRs related to a feature -- same for the language, ECMAScript[3] officially.[4]
Since you mentioned Clojure, have you looked at ClojureScript?[5] That may be a good entry to JS authors & articles you'd enjoy.
> I have the impression that NodeJS is a bit more magical than the JVM [...] Is that correct? Where are good resources on this subject?
As other replies have mentioned, you're really talking about V8[6] for the "JSVM" executing that code. A thing I've seen throw some people for a loop is how minimalist the specification actually is.[7] The magic in NodeJS is certainly from V8 and the rate of optimizations there but also libuv,[8] what actually powers the infamous event loop.
Hope that helps!
[0]: https://github.com/EnterpriseQualityCoding/FizzBuzzEnterpris...
[1]: Borrowing from Erlang, see Making reliable distributed systems in the presence of software errors, Joe Armstrong, page 104 "Error Handling Philosophy" https://erlang.org/download/armstrong_thesis_2003.pdf
[2]: _Most_ kinds of errors will cause the process to crash if you don't handle them, https://nodejs.org/dist/latest-v16.x/docs/api/errors.html . Promise rejections don't (yet) though it emits an error, and callback-based APIs will always consist of an [error, data] tuple for the arguments
[3]: https://github.com/tc39/proposals
[4]: Because Oracle owns the trademark, of course: http://tarr.uspto.gov/servlet/tarr?regser=serial&entry=
[5]: https://clojurescript.org/
[6]: https://v8.dev/docs
[7]: "ECMAScript as defined here is not intended to be computationally self-sufficient; indeed, there are no provisions in this specification for input of external data or output of computed results. Instead, it is expected that the computational environment of an ECMAScript program will provide not only the objects and other facilities described in this specification but also certain environment-specific objects, whose description and behaviour are beyond the scope of this specification except to indicate that they may provide certain properties that can be accessed and certain functions that can be called from an ECMAScript program." https://tc39.es/ecma262/#sec-overview
[8]: https://github.com/libuv/libuv
proposal-array-grouping
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TC39: Add Object.groupBy and Map.groupBy
Global iterator type is coming: https://github.com/tc39/proposal-iterator-helpers
But a method named `groupBy` on iterators traditionally means a different thing: https://github.com/tc39/proposal-array-grouping/issues/51#is...
Global iterable type it's too late for, since there's many extant iterables in the language and on the web which don't have it in their prototype chain and can't reasonably be changed.
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What's New in Node.js 21
Array grouping to combine like data into groups using Object.groupBy() and Map.groupBy().
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Updates from the 97th TC39 meeting
Array Grouping: A proposal to make grouping of array items easier.
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Snap.js - A competitor to Lodash
They are coming out with array.group() soon, which is supposed to also fulfil the use-case of partitioning :) - https://github.com/tc39/proposal-array-grouping.
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[AskJS] Is JavaScript missing some built-in methods?
https://github.com/tc39/proposal-array-grouping for those curious
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Set methods proposal reaches stage 3
I'm also looking forward to map.emplace() and arr.group() and iterator helpers.
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SmooshGate
At the end of the day, it comes down to whether browser vendors are willing to ship the feature even though it breaks said websites, and they do have visitor data to back those decisions. If the rule was "never break any website ever", you'd be able to block proposals you don't personally like by crafting a website that "gets broken" by that proposal.
At least in the array grouping proposal, they did evaluate amount and popularity of possibly breaking sites, before eventually renaming the method from .groupBy to .group
https://github.com/tc39/proposal-array-grouping/issues/37
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New ECMAScript 23 array features
The proposal is described here.
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how can I split an array into multiple arrays based on a property?
Remarkably, this is now a TC39 proposal.
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Upcoming ECMAScript features I'm excited about
Proposal, Polyfill
What are some alternatives?
DIPs - D Improvement Proposals
es1995 - ES1995 – The Missing JS Polyfill
peps - Python Enhancement Proposals
retro-random-number
proposal-set-methods - Proposal for new Set methods in JS
proposal-regexp-r-escape - Regular Expression `\R` Escape for ECMAScript
Nim - Nim is a statically typed compiled systems programming language. It combines successful concepts from mature languages like Python, Ada and Modula. Its design focuses on efficiency, expressiveness, and elegance (in that order of priority).
proposal-string-cooked - ECMAScript proposal for String.cooked built-in template tag
temporal-polyfill - Polyfill for Temporal (under construction)
proposal-function-pipe-flow - A proposal to standardize helper functions for serial function application and function composition.
proposal-change-array-by-copy - Provides additional methods on Array.prototype and TypedArray.prototype to enable changes on the array by returning a new copy of it with the change.
proposal-array-from-async - Draft specification for a proposed Array.fromAsync method in JavaScript.