HBhbbio·Jan 3, 2017
One of the missing languages is Opa, which has more than 1k stars and has been on GitHub for years.
https://github.com/mlstate/opalang
In Programming languages that are actively developed on GitHubMLstate
opalang
OCaml2011–2017
MLstate / opalang
opalang
The Opa Language for Web Application Development
8Distinct people
11Mentions
0Explicit recommenders
1.3KGitHub stars
What to know before exploring
What it is
The Opa Language for Web Application Development
GitHub
Where it is used
No documented product use has been verified yet.
What people are saying
No recommendation phrase was found in the indexed comments.
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Also in these discussions
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This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 12:54:37 PM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by year11 dated mentions
Observed mentions: 2011-06-21 19:01:42 UTC to 2017-01-03 11:22:44 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2011 | 2011-01-01 00:00:00 UTC | 2012-01-01 00:00:00 UTC | 3 | 2 | 1 |
| 2012 | 2012-01-01 00:00:00 UTC | 2013-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2013 | 2013-01-01 00:00:00 UTC | 2014-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2014 | 2014-01-01 00:00:00 UTC | 2015-01-01 00:00:00 UTC | 3 | 0 | 3 |
| 2015 | 2015-01-01 00:00:00 UTC | 2016-01-01 00:00:00 UTC | 2 | 0 | 2 |
| 2016 | 2016-01-01 00:00:00 UTC | 2017-01-01 00:00:00 UTC | 1 | 1 | 0 |
| 2017 | 2017-01-01 00:00:00 UTC | 2018-01-01 00:00:00 UTC | 1 | 0 | 1 |
What Hacker News says
11 sourcesThe Opa Language – Rapid and Secure Web Development
2 points · Open discussionHere is an "introduction for coders" on GH - I think it explains it better than the website https://github.com/MLstate/opalang/wiki/A-tour-of-Opa
In The Opa LanguageHaving parsers at hand in a language is an important feature.
In Opa (http://opalang.org), we decided to have parsers as first-class objects: cf. https://github.com/MLstate/opalang/wiki/The-core-language#pa...
And this is used at least 35 times in a real project such as PEPS: https://github.com/MLstate/PEPS
(according to `git grep "= parser" | wc -l`)
In InstaParse: Context-Free Grammars as Easy as Regular ExpressionsOCaml was used for implementation of the Opa framework some years ago https://github.com/MLstate/opalang
In Facebook Launches Flow, Static Type Checker for JavaScriptYou can have a look at
http://github.com/MLstate/opalang
In Why We Use OCamlGiven that Opal.rb was started in 2010 and Opalang (back then called opages) in 2010 as well, I would file that under "unfortunate".
https://github.com/opal/opal/commits/master?page=107
https://github.com/MLstate/opalang/commits/master?page=126
In Opal: Ruby to JavaScript CompilerOh great. It's still AGPL :-|
https://github.com/MLstate/opalang/blob/master/LICENSE
In Announcing Opa 1.0Partial answers/tidbits:
The JS code is not as optimized as what you can write manually, although a lot of work was put in making it work "fast enough" (thanks Mathieu). However, we have many ideas on how to reach native performance. Look for instance at how Java got sometimes even faster than C!
There are hints @server and @client to specify a side for running a bit of your code. Since, as you say, there are things you know and the machine doesn't.
Opa being a compiler, updated projects have to be recompiled. You gain a lot in quality, consistency with this (especially associated to the very advanced type system of Opa). And as we know that compilers are annoying, we made our best to make the compile time short. You probably won't have to take a coffee, sorry.
The chat example does not rely on predefined libraries -- that's the differenc
Read the rest
e. You can also look at bigger chat applications like https://github.com/hbbio/OpaChat and compare with https://github.com/ry/node_chat.
Opa requires Java for building from source - if the package does, that's something you can report at https://github.com/mlstate/opalang/issues?sort=created&d...
Opa (the cloud language) is now open-sourced
5 points · Open discussionThe OPA language compiler is now open source (AGPLv3)
3 points · Open discussion