flow-runtime | runtime type system for JavaScript with full Flow | Plugin library
kandi X-RAY | flow-runtime Summary
kandi X-RAY | flow-runtime Summary
A runtime type system for JavaScript with full Flow compatibility.
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Top functions reviewed by kandi - BETA
- Unzipped .
- Formats URL parameters .
- Create a new component .
- Returns true if the given parameter is a flow of flow .
- Removes pattern bindings from path .
- Determines the section name of a flow section .
- Wrap a promise - returning function
- Returns the property name of the identifier .
flow-runtime Key Features
flow-runtime Examples and Code Snippets
Community Discussions
Trending Discussions on flow-runtime
QUESTION
Hello kind Stackoverflow folks,
I'm trying to create a function to guard off code from being executed at run-time with an incorrect Flow type present.
My understanding is that the way to do this at run-time is by refining, or checking, that the type matches what is required and using Flow to keep an eye that no cases are missed along the way.
A simple case is where I have a string input that I would like to confirm matches to a enum/Union type. I have this working as I would expect with literals e.g.
...ANSWER
Answered 2019-Jan-24 at 14:32One approach that appears to works is to use the const object which defines the allowed values, to:
- Generate a union type using the $keys utility.
- Use that union type to create a map object where the keys are the desired input (our case strings) and the values are "maybe"s of the type that needs refining.
Here's the example from earlier reworked so that it:
- Sets the type up as we'd expect to allow either "foo" or "baa" but nothing else.
- Detects when a string is suitably refined so that it only contains "foo" or "baa".
- Detects when a string might contain something else other than what's expected.
Credit to @vkurchatkin for his answer that helped me crack this (finally).
QUESTION
We use Flow for static type-checking in JavaScript. Flow types can get complex, and we've had issues where we thought we had good static type guards against malformed objects, but Flow annotation issues meant that type checking didn't actually catch problems.
To prevent this problem, I'd like to write type-based "unit tests" that can statically assert our assumptions about type protections. This is easy if I want to assert the "valid" case, using type assertions:
...ANSWER
Answered 2018-Sep-19 at 06:39To assert that certain lines of code in your unit tests should raise Flow errors, just write a Flow error suppression comment above those lines, then run flow check --max-warnings 0 on your entire unit tests folder (or your entire codebase) and assert that the command has a 0 exit status (no errors or warnings). You don’t need to run the commands on each unit test file individually.
As the documentation for suppress_comment says, Flow will raise a warning if you write a suppression comment such as // $FlowExpectError above a line that does not actually trigger a Flow error.
Assuming you defined your suppress_comment to understand $FlowExpectError as a suppression comment, this is what your unit tests would look like:
QUESTION
I've installed Tensorflow into a fresh virtual environment on OSX 10.12: https://www.tensorflow.org/install/install_mac#installing_with_virtualenv
In one attempt I installed both of these in a fresh virtualenv:
...ANSWER
Answered 2017-May-24 at 21:22Symbolic links from libcudnn.5.dylib to the available libcudnn.6.dylib solved it. I put links in both /Developer/NVIDIA/CUDA-8.0/lib and /usr/local/cuda/lib:
QUESTION
I am attempting to use flow disjoint unions to strongly type redux action objects, as suggested in the Flow docs (https://flow.org/en/docs/frameworks/redux/), but am now running into issues with flow throwing an error handling default redux actions (@@redux/INIT, @@redux/PROBE_UNKNOWN_ACTION, etc.).
A sample of this code would be:
...ANSWER
Answered 2017-Apr-07 at 13:37The simplest solution, without importing the full flow-typed package for redux, is to add a disjoint union { type: $Subtype } to the ActionType disjoint union type, as below:
QUESTION
I'm using rect-redux-universal-hot-example as a base for my isomorphic app loader using ReactJs.
I'm using react-hot-loader and following this migration guide to remove the deprecated hmr react-transform.
I did the configuration below, but my page in browser is not being reloaded automatically once I change some App component data. No errors at all on both console or brower.
Here is my setup:
.babelrc
...ANSWER
Answered 2017-Apr-02 at 21:15I think you're missing a few things here:
In your dev.config.js, you would also need webpack-hot-middleware/client in your main entry.
In your client.js:
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