proposal-change-array-by-copy
proposal-hashbang
proposal-change-array-by-copy | proposal-hashbang | |
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14 | 8 | |
510 | 133 | |
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3.1 | 0.0 | |
9 months ago | almost 2 years ago | |
HTML | HTML | |
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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-hashbang
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Javascript, the GOAT of programming languages that will take over the world in 2024
Before ECMAScript 2023 (ES14), executing a JavaScript file directly from the command line required manually specifying the interpreter path in the first line of the module. This process could vary depending on the operating system and Node.js installation.ES14 standardizes the use of hashbangs (#!) in JavaScript modules, enabling direct execution without the need for explicit interpreter invocation. The hashbang syntax is a simple convention that indicates the interpreter to be used for executing a module. It consists of a shebang (#!) followed by the path to the interpreter and optionally any arguments. For a JavaScript file, the hashbang line typically includes the path to the Node.js executable.
- What's new in ES2023?
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ES2023 features list!
https://github.com/tc39/proposal-hashbang has some details.
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JavaScript's New Features: Exploring the Latest Additions to the Language
Hashbang Grammar
- ES2023 candidate source code + spec
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Updates from the 91st TC39 meeting
Hashbang Grammar: match de-facto usage in some CLI JS hosts that allow for #! Shebangs / Hashbang.
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cmru is a command runner that allows you to describe commands with javascript.
But if you just wanted to execute it directly then you could use a shebang because everything after the bang is interpreted and not the bang its self. Most js engines allow this in some form. Here is a proposal to standardize it. https://github.com/tc39/proposal-hashbang
- Released Google/zx – tons of DX improvements and more
What are some alternatives?
proposal-set-methods - Proposal for new Set methods in JS
sh - Python process launching
proposal-arraybuffer-transfer - Proposal to add ArrayBuffer.prototype.transfer
proposal-symbols-as-weakmap-keys - Permit Symbols as keys in WeakMaps, entries in WeakSets and WeakRefs, and registered in FinalizationRegistries
proposal-accessible-object-hasownproperty - Object.hasOwn() proposal for ECMAScript
clii - Easily build a cli app.
zod - TypeScript-first schema validation with static type inference
proposal-array-find-from-last - Proposal for Array.prototype.findLast and Array.prototype.findLastIndex.
proposal-object-pick-or-omit - Ergonomic Dynamic Object Restructuring. [Moved to: https://github.com/tc39/proposal-object-pick-or-omit]
proposal-iterator-helpers - Methods for working with iterators in ECMAScript
temporal-polyfill - Polyfill for Temporal (under construction)