generator
proposal-iterator-helpers
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generator | proposal-iterator-helpers | |
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5 | 35 | |
4 | 1,242 | |
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7.7 | 5.0 | |
6 months ago | 19 days ago | |
TypeScript | HTML | |
MIT License | - |
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generator
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Ramda: A practical functional library for JavaScript programmers
I find straight forward, dedicated combinators much more readable and practical to use ie. for iterables (context where it makes a lot of sense) [0] example [1], runtime assertions (through refutations, which are much faster than combinators over assertions) [2], parser combinators for smallish grammars [3] etc.
In many cases vanilla/imperative js is more readable and terse, no need to bring functional fanaticism everywhere, just in places where it gives true benefits and in form that can be understood by peers.
Functional code can be beautiful and can also be unreadable/undebugable. Same with imperative code. It's great in js/ts you can pick approach where the problem is expressed more naturally and mix it at will.
[0] https://github.com/preludejs/generator
[1] https://observablehq.com/@mirek/project-euler
[2] https://github.com/preludejs/refute
[3] https://github.com/preludejs/parser
- Why Would Anyone Need JavaScript Generator Functions?
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A pipe operator for JavaScript: introduction and use cases
You can type it, take a look at pipe and pipe1 in [0].
[0] https://github.com/preludejs/generator/tree/master/src
- Parser Combinators in Haskell
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Loopless Code
Loops are great if your programming languages supports iterables/iterators/generators (also async generators) like in js/ts for example.
Especially generator-to-generator combinators ie. [0] give you terse, transducer expressiveness over computation on finite/infinite streams, arrays, etc. (all iterables). It's easy to compose them, jump into for loops if needed for arbitrary yielding (ie. yielding multiple items sometimes, skipping some, halting etc). `continue`, `break`, nesting, yield, yield from, normal code in for loops is very intuitive and terse creating pleasant, understandable code.
[0] https://github.com/preludejs/generator
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?
angstrom - Parser combinators built for speed and memory efficiency
proposal-function-helpers - A withdrawn proposal for standardizing some useful, popular helper functions into JavaScript’s Function object.
assert-combinators - Functional assertion combinators.
IxJS - The Interactive Extensions for JavaScript
ppipe - pipes values through functions, an alternative to using the proposed pipe operator ( |> ) for ES
proposal-hack-pipes - Draft specification for Hack pipes in JavaScript.
notion-sdk-js - Official Notion JavaScript Client
proposal-hack-pipes - Draft specification for Hack pipes in JavaScript. [Moved to: https://github.com/tc39/proposal-hack-pipes]
EventSource - a polyfill for http://www.w3.org/TR/eventsource/
async-generator - Async generator module.
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