proposal-change-array-by-copy
proposal-iterator-helpers
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510 | 1,242 | |
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9 months ago | 22 days ago | |
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proposal-change-array-by-copy
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Records and Tupples in JavaScript
The new change array by copy methods (ES2023) will also work with tuples. So while you can't
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JavaScript's New Features: Exploring the Latest Additions to the Language
Change Array by Copy
- ES2023 candidate source code + spec
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[AskJS] Is JavaScript missing some built-in methods?
Stage 3 Change array by copy proposal offers methods like sortTo() that return a new array instead of mutating the original.
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Sorry for the bad quality, can someone please explain how this code arranges the numbers in the array from smallest to biggest ? what does a-b do ?
Note: there's a stage 3 proposal that introduces copy = arr.toSorted().
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Updates from the 94th TC39 meeting
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.
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New ECMAScript 23 array features
The proposal is described here, with the other methods being:
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Upcoming ECMAScript features I'm excited about
Proposal, Polyfill
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Some functions modify the Array, others do not. Why? Is there a way to "filter" those functions?
You're unlikely to see any new methods being added to JavaScript's Array that would modify an array in place like reverse() and sort() do. In fact some of the new methods that are being added are versions of reverse() and sort() (and splice()) that create copies rather than modifying the originals. Read more about them here: Proposal: Change Array by copy.
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Future Javascript: New Array Methods Coming soon
Since cloning is so common, a new specification has been written which has reached stage 3, which will give us a host of new ways to copy and then change an array. This proposal is called the "Change Array by Copy" proposal. Let's take a look at how it works.
proposal-iterator-helpers
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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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Lodash just declared issue bankruptcy and closed every issue and open PR
Very much agreed. The amount of mileage we get from using Spread (literally the ...) alone has been amazing. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe... Iteration helpers is shipping soon, that'll be a huge help (async iteration helpers will be delayed for a while). https://github.com/tc39/proposal-iterator-helpers .
In the olden days, I feel like the codebases I worked on needed to use .apply() multiple times a week, to figure out some creative way of invoking functions. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe... That's all gone now; I'd take even odds that 50% of my team knows .call and .apply.
Chrome 117 is shipping Object.groupBy() and that's gonna be a huge help in eliminating a lot of the last places we end up using lodash. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe...
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It’s 2023. Start using JavaScript Map and Set
Once this https://github.com/tc39/proposal-iterator-helpers reaches browsers, I'm prob gonna be exclusively using Maps.
- Why I Like Using Maps (and WeakMaps) for Handling DOM Nodes
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Updates from the 95th TC39 meeting
No, probably not. But with iterator helpers, you can do
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All JavaScript and TypeScript features of the last 3 years explained
> focus more on improving the terrible JS web API
That's W3C’s job, not ECMA’s.
> Where are all the containers?
?
> Sorted sets/maps?
Sets and Maps are sorted (by insertion order)
> Why can't I even map an iterator?
It's coming, but someone will likely be exhausted by that addition. https://github.com/tc39/proposal-iterator-helpers
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Uncle Bob and Casey Muratori Discuss Clean Code
Upcoming: https://github.com/tc39/proposal-iterator-helpers
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[AskJS] Is JavaScript missing some built-in methods?
Not Generators, but Iterators have a Stage 3 proposal with helpers like these.
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Just fighting URLSearchParams and wonder if anyone uses iterators IRL and what I do miss
I guess you are not the only one dealing with this. That’s why there is this proposal https://github.com/tc39/proposal-iterator-helpers So hopefully it will get easier soon. But in most cases you can simply wrap it in Array.from or you can also clone with the spread operator.
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Iterator/Generator Exercises?
Let's assume Number.range(), iterator helpers and some isPrime() function. From that we could easily create the following:
What are some alternatives?
proposal-set-methods - Proposal for new Set methods in JS
proposal-function-helpers - A withdrawn proposal for standardizing some useful, popular helper functions into JavaScript’s Function object.
proposal-arraybuffer-transfer - Proposal to add ArrayBuffer.prototype.transfer
IxJS - The Interactive Extensions for JavaScript
proposal-accessible-object-hasownproperty - Object.hasOwn() proposal for ECMAScript
proposal-hack-pipes - Draft specification for Hack pipes in JavaScript.
zod - TypeScript-first schema validation with static type inference
proposal-hack-pipes - Draft specification for Hack pipes in JavaScript. [Moved to: https://github.com/tc39/proposal-hack-pipes]
proposal-symbols-as-weakmap-keys - Permit Symbols as keys in WeakMaps, entries in WeakSets and WeakRefs, and registered in FinalizationRegistries
EventSource - a polyfill for http://www.w3.org/TR/eventsource/
temporal-polyfill - Polyfill for Temporal (under construction)
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