rapydscript-ng | A transpiler for a Python like language to JavaScript | Transpiler library
kandi X-RAY | rapydscript-ng Summary
kandi X-RAY | rapydscript-ng Summary
RapydScript (pronounced RapidScript) is a pre-compiler for JavaScript, similar to CoffeeScript, but with cleaner, more readable syntax. The syntax is almost identical to Python, but RapydScript has a focus on performance and interoperability with external JavaScript libraries. This means that the JavaScript that RapydScript generates is performant and quite close to hand written JavaScript.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of rapydscript-ng
rapydscript-ng Key Features
rapydscript-ng Examples and Code Snippets
Community Discussions
Trending Discussions on Transpiler
QUESTION
Consider the following TypeScript snippet:
...ANSWER
Answered 2022-Feb-28 at 02:39This is a design limitation in TypeScript; see microsoft/TypeScript#46707 for details. It's sort of a cascading failure that results in some weird errors.
A generally useful feature was implemented in microsoft/TypeScript#29478 allowing the compiler to use the expected return type of a generic function contextually to propagate a contextual type back to the generic function's arguments. That might not make much sense, but it sort of looks like this:
QUESTION
I am trying to transpile an ES6 express app using Parceljs.
Trying to run the parcel dev server using yarn parcel index.js
displays that it is running at localhost:1234
but the page is blank. It also generates the following output when trying to run node dist/index.js
:
ANSWER
Answered 2022-Feb-20 at 19:15See issue 355: Is parcel meant to work with server-side code insluding HMR?: parcel does not (yet) support hot module reloading in nodejs.
QUESTION
I get a broken image in the browser when rendering the path to images saved on backend (using express). I know there are similar questions, but non could solve the issue for me.
DetailsI have this on my server.ts
file running in http://localhost:5000
:
ANSWER
Answered 2021-Dec-19 at 21:05Following @Molda 's comment -
I changed to const pathToFile = path.resolve(__dirname, '../public');
(added one more '.') and the images are loaded properly!
QUESTION
I am using DOJO toolkit and after upgrading to use the closure compiler, I noticed I needed to transpile to ES5 BEFORE the dojo build util does it's job in order to take advantage of newer ES6+ features.
So I am using babel-maven-plugin
to accomplish this.
Everything is working fine with the exception that the ...spread
operator is not transpiling.
Do I need to download the @babel/preset-env
package as well to set the preset
option? or is there an option I am missing?
ANSWER
Answered 2021-Nov-30 at 15:39After further discovery there is no need to download any preset package.
babel-standalone
takes in preset options through its API as defined here and use in the babel-maven-plugin here.
The preset option is not passed to the Babel API like defined in a .babelrc
config file. It is passed in without the preset-
prefix. So to get the @babel/preset-env
preset option you need to simply pass in env
.
So to round this out, here are the common presets and how you would pass them through to the API:
@babel/preset-env
-->env
@babel/preset-react
-->react
@babel/preset-flow
-->flow
@babel/preset-typescript
-->typescript
So in order to use babel-maven-plugin
I need to set up the pom.xml
as follows:
QUESTION
I would like to transpile JavaScript into LinkScript. I have started like this:
...ANSWER
Answered 2021-Nov-16 at 14:03Writing a transpiler is a very big job... For a variety of reasons, though, JavaScript workflows are already full of transpilers, so there are many tools to help.
If your target language looks like JavaScript, then you would write your transpiler as a plug-in for Babel: https://babeljs.io/
Otherwise, maybe start with jscodeshift, which will provide you with an easily accessible AST.
Many open-source javascript tools, like eslint, also have javscript parsers in there that you could extract with a bit of effort.
Also see the AST Explorer
Once you have an AST, you would typically process it recursively, maybe following the visitor pattern, to convert each AST node into the equivalent target structure. Then maybe peephole optimization to simplify the resulting AST. Then finally serialize it. jscodeshift comes with a javascript serializer that you could replace with your own.
QUESTION
I'm running into an issue with the node-fetch
library.
The new version (3.0.3) has "type": "module"
in its package.json. This is a problem because I transpile my code from ES6 to regular js which uses require
and then I get ...firebase_datasource.js is an ES module file as it is a .js file whose nearest parent package.json contains "type": "module" which defines all .js files in that package scope as ES modules.
I can use an earlier version of node-fetch
that doesn't contain "type": "module"
in its package.json in its package.json, but that's not a solution.
What's the correct way to handle this?
ANSWER
Answered 2021-Nov-12 at 22:59node-fetch
's README explains what to do:
CommonJS
node-fetch
from v3 is an ESM-only module - you are not able to import it withrequire()
.If you cannot switch to ESM, please use v2 which remains compatible with CommonJS. Critical bug fixes will continue to be published for v2.
QUESTION
This works fine in .pxd file:
...ANSWER
Answered 2021-Nov-07 at 00:45I've figured out how to define C++ class (not the Python extension type 'class') in Cython only; it is still transpiled to .h
file as struct
but with methods inside:
QUESTION
I raised an issue https://github.com/facebook/jest/issues/11504 against the jest project, which I think is responsible for maintaining babel-jest. Transpilation totally fails after adding apparently harmless and error-free code.
However, there are a lot of layers to the transpilation of a Typescript Next project, so I am unsure if this is the correct place to file the issue and matches with the likely source of the failure.
Does this issue seem like it matches with the babel-jest project or should I file it somewhere else?
BUG
I found in a complex Next Typescript project that adding a handful of lines in one file was enough to break babel-jest transpilation and create runtime errors in a completely different file.
In commit 04c4c7b, after checking out the clean project and running yarn
I am able to get passing tests with yarn run test
. The passing source tree is at https://github.com/cefn/jest-transpile-failure-repro/tree/04c4c7b7013e8b88c25d3ab2a7d4a33ccd3fb191
However, after adding the handful of lines which you can see in commit 25703fc the babel-jest transpiler seems to effectively break making tests impossible to run, and a totally unrelated file starts to get runtime errors during the test which make no sense like...
...ANSWER
Answered 2021-Jun-03 at 17:14You are introducing a dependency cycle in your code by adding the new
QUESTION
I have a big project in php 5 and it's well documented. Now, I want to migrate to php 7.2 and I have already checked the compatibility using phpstan and every thing is alright. So, I wonder if there is a tool that could automatically transform the php 5 annotations to php 7 (like functions declarations and variables )?
Thanks in advance
...ANSWER
Answered 2021-Jun-01 at 10:40If you are looking to convert phpdoc param types to typehints, you can use php-cs-fixer that includes this kind of feature : phpdoc_to_param_type
There is also a fixer for function return types : phpdoc_to_return_type
Example from the php-cs-fixer documentation :
QUESTION
I want to be very clear that I am not asking how to transpile a C# UWP app to a JavaScript UWP app. I am, rather, attempting to extract portions of an existing C# UWP application that can be migrated to create a Node.js server. I attempted to use Bridge.NET, but my impression (correct me if I'm wrong) is that there is no way to build an app that targets both UWP and .NET. If there is, this alone would likely solve my problem.
...ANSWER
Answered 2021-Apr-27 at 05:52This should be possible using the Uno Platform; see this blog post. Alternatively, have a look at this workaround.
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Install rapydscript-ng
RapydScript comes with its own Read-Eval-Print-Loop (REPL). Just run ``rapydscript`` without any arguments to get started trying out the code snippets below.
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