proposal-explicit-resource-management
pidove
proposal-explicit-resource-management | pidove | |
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22 | 9 | |
703 | 46 | |
4.0% | - | |
6.5 | 0.0 | |
27 days ago | almost 2 years ago | |
JavaScript | Java | |
BSD 3-clause "New" or "Revised" License | MIT License |
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proposal-explicit-resource-management
- Cooperation between Cloudflare Workers has become amazing thanks to RPC support
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Proposal: Signals as a Built-In Primitive of JavaScript
The standard doesn't have anything to do with TypeScript, not sure where you got that from? https://github.com/tc39/proposal-explicit-resource-managemen...
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How does TypeScript's explicit resource management work?
The explicit resource management proposal tries to make it a bit easier for us, by allowing the resource to declare how it should be managed, rather than expecting us to clean everything up when we use the resource. We get a new keyword using to define a variable (rather than const or let), which tells the runtime to clean up the resource at the end of the function.
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Using using in TypeScript for resource management
Enter the explicit resource management proposal, which describes — among many other things — a new using operator that was introduced in TypeScript 5.2 and is making its way into JavaScript. From the top of the README file, here’s what this proposal aims to do:
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OpenTelemetry in 2023
In addition to this, is the new (stage 3 even!)explicit resource management proposal[0], supported by TypeScript version >= 5.2[1]
Though I agree that async context is better fit for this generally, the RMP should be good for telemetry around objects that have defined lifetime semantics, which is a step in the right direction you can use today
[0]: https://github.com/tc39/proposal-explicit-resource-managemen...
[1]: https://www.totaltypescript.com/typescript-5-2-new-keyword-u...
- ECMAScript Explicit Resource Management Proposal
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Why is JavaScript so hated?
It's too early for that, https://github.com/tc39/proposal-explicit-resource-management
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TypeScript 5.2's New Keyword: 'using'
[3]: https://github.com/tc39/proposal-explicit-resource-managemen...
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Douglas Crockford: “We should stop using JavaScript”
I'm not _entirely_ sure which RAII you mean, but if you mean something like C#'s `using` or Java's `try-with-resources` or Python's `with`, then https://github.com/tc39/proposal-explicit-resource-managemen... and https://github.com/tc39/proposal-async-explicit-resource-man... are in stage 3 (of 4 stages) in ECMAScript's language proposal lifecycle and will be coming to a JS engine near you behind a flag soon-ish.
pidove
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Java JEP 461: Stream Gatherers
Streams is too complex for what it does and it doesn’t even parallelize well. Here is something that does roughly the same thing but I think is way better
See https://github.com/paulhoule/pidove
https://central.sonatype.com/artifact/com.ontology2/pidove
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Java 21: The Nice, the Meh, and the Momentous
(1) It's a bit of a bad smell (which he points out) that records aren't being used much at all in the Java stdlib, I wrote something that built out stubs for the 17 and 18 stdlibs and that stood out like a sore thumb. I do like using records though.
(2) I've looked at other ways to extend the collections API and related things, see
https://github.com/paulhoule/pidove
and I think the sequenced collections could have been done better.
(3) Virtual Threads are kinda cool but overrated. Real Threads in Java are already one of the wonders of the web and perform really well for most applications. The cases where Virtual Threads are really a win will be unusual but probably important for somebody. It's a good thing it sticks to the threads API as well as it did because I know in the next five years I'm going to find some case where somebody used Virtual Threads because they thought it was cool and I'll have to switch to Real Threads but won't have a hard time doing so.
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Ask HN: What problems do Generators solve in Java?
I think that guy just made up a generator class for fun. It’s not too different from the integrator except it doesn’t have a hasNext() method so it either returns results forever or it has to return a sentinel value like null or return an exception to end iteration.
Somebody could make the case that returning a sentinel value or an exception is a better API since there is no risk somebody else is going to call the next() method after you call hasNext() and next(). Writing a generator that wraps a generator is a little simpler than writing an interest or that wraps an iteration because you don’t have to write a hasNext() function, which can occasionally be awkward.
That generator library has a few functions, like map that work on generators, unfortunately the Java stdlib doesn’t come with anything like that. (There is the streams API but it is over-complicated.)
I’ll point out this library I wrote
https://github.com/paulhoule/pidove
which does a lot of what the Steams library does but it works on iterators without creating streams. If you like those generator examples you might like pidove.
As for Python it is kinda accidental that generators would up related to coroutines, that is, generators were an easy way to implement coroutines, later async/await and stuff like that got added.
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Overinspired?
I find this alien to my point of view. On the other hand, my side projects aren't driven by FOMO but are more like the "special interests" of autistic people.
Most of the time I have three side projects going on, maybe two of which are really getting the attention they deserve and one that is languishing. (See my profile to see about my current three.) Occasionally I get inspired to spend 1-4 weekends on some sudden inspiration, of which
https://github.com/paulhoule/pidove
came to completion but
https://github.com/paulhoule/ferocity
probably won't. The project I'm working the hardest on now is something that I was baffled that it didn't exist 18 years ago but felt compelled to do something out because of the Twitterinsanity last December and it turned out the technological conditions right now make it the perfect time to work on.
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JDK 20 and JDK 21: What We Know So Far
When I saw sequenced collections earlier I didn’t like the design but I completely approve of the latest revision. One nice thing about the process they use to develop Java is that they really do work and rework new features to make them great.
I just wish that instead of Streams they’d made something more like
https://github.com/paulhoule/pidove
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I love building a startup in Rust. I wouldn't pick it again
... or you can just use a sane FP library like
https://github.com/paulhoule/pidove
Some people don't like the Lispy signatures so I did start coding up a version with with a fluent interface but didn't quite finish.
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“I've never heard anyone say that they loved Java” (2001)
Inner classes are pretty useful.
This library contains a huge number of Iterables, each of which has at least one Iterator implementation.
https://github.com/paulhoule/pidove
It is convenient to let the Iterator be immutable and the Iterator be an inner class that gets its configuration information out of the Iterable.
(That said, if people really thought seriously about Iterator being a Supplier people might think more rationally about error handling. Also in a slightly parallel universe the Iterator would only have one method since remove() hardly ever gets used and having both hasNext() and next() methods is asking for bugs.)
- Show HN: Pidove, an Alternative to the Java Streams API
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Ask HN: Working Offline for 8 Hours?
If you were programming in Python or many other languages you could download documentation locally.
In both Python and Java doing a mini-project I frequently challenge myself to only use the standard library. It's good for practicing HackerRank-rank style programming (the fun of single-file Java)
When I am waiting for builds I sometimes hack on this
https://github.com/paulhoule/pidove
because I don't really like the Streams API and want to perfect my mastery of generics and internal DSLs.
Now that I think of it, standard-library only for node seems like a good challenge for me because I code a lot of front-end Javascript but just barely know the node API.
What are some alternatives?
librope - UTF-8 rope library for C
Reactive Streams - Reactive Streams Specification for the JVM
caniuse - Raw browser/feature support data from caniuse.com
project-loom-c5m - Experiment to achieve 5 million persistent connections with Project Loom virtual threads
proposal-class-method-parameter-decorators - Decorators for ECMAScript class method and constructor parameters
ferocity - Write Java expression trees, statements, methods and classes with a LISP-like internal DSL
search-benchmark-game - Search engine benchmark (Tantivy, Lucene, PISA, ...)
Newt - Autogenerate a .Net (C#/EF Core) data project (class library with entities and data contexts) from a Postgres database, plus Graphviz and SQL.
proposal-iterator-helpers - Methods for working with iterators in ECMAScript
gophercon22-parser-combinators - Simple parser combinator package as shown at GopherCon 2022
proposal-record-tuple - ECMAScript proposal for the Record and Tuple value types. | Stage 2: it will change!
go - The Go programming language