fp-ts | Functional programming in TypeScript | Functional Programming library

 by   gcanti TypeScript Version: 3.0.0-alpha.26 License: MIT

kandi X-RAY | fp-ts Summary

kandi X-RAY | fp-ts Summary

fp-ts is a TypeScript library typically used in Programming Style, Functional Programming applications. fp-ts has no bugs, it has no vulnerabilities, it has a Permissive License and it has medium support. You can download it from GitHub.

Functional programming in TypeScript
Support
    Quality
      Security
        License
          Reuse

            kandi-support Support

              fp-ts has a medium active ecosystem.
              It has 9532 star(s) with 488 fork(s). There are 107 watchers for this library.
              OutlinedDot
              It had no major release in the last 12 months.
              There are 142 open issues and 647 have been closed. On average issues are closed in 120 days. There are 32 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of fp-ts is 3.0.0-alpha.26

            kandi-Quality Quality

              fp-ts has 0 bugs and 0 code smells.

            kandi-Security Security

              fp-ts has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              fp-ts code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              fp-ts is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              fp-ts releases are available to install and integrate.
              Installation instructions, examples and code snippets are available.
              It has 30 lines of code, 0 functions and 264 files.
              It has low code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi's functional review helps you automatically verify the functionalities of the libraries and avoid rework.
            Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of fp-ts
            Get all kandi verified functions for this library.

            fp-ts Key Features

            No Key Features are available at this moment for fp-ts.

            fp-ts Examples and Code Snippets

            No Code Snippets are available at this moment for fp-ts.

            Community Discussions

            QUESTION

            fp-ts Option, Typescript and undefined
            Asked 2022-Mar-17 at 14:49

            I'm trying to create a simple helper function using fp-ts/Option and Typescript that takes a an arbitrary value and returns it as an Option.

            ...

            ANSWER

            Answered 2021-Sep-13 at 18:43

            The typescript utility type NonNullable comes in handy at times like this.

            Source https://stackoverflow.com/questions/68960556

            QUESTION

            merging 2 TaskEither in fp-ts
            Asked 2022-Mar-17 at 14:45

            I am working on a project that using fp-ts

            I have 2 TaskEither object like TaskEither, TaskEither

            I wanted to merging this objects contents and create new TaskEither,
            Example A object = {a: 123, b: 456, c: 0}

            Example B object = {c: 789}

            I wanted to create newObject: TaskEither

            and If everything goes well, expecting value should be {a: 123, b: 456, c: 789 }

            ...

            ANSWER

            Answered 2021-Dec-01 at 07:47

            I would recommend to use the Do-Notation in this case. Here an example.

            Source https://stackoverflow.com/questions/70174986

            QUESTION

            Cannot fix error Types of parameters 'r' and 'a' are incompatible
            Asked 2022-Mar-16 at 01:49

            I try to replicate this code from this blog, but running into some pretty obscure errors

            ...

            ANSWER

            Answered 2022-Mar-16 at 01:49

            I don't know how this code could have worked, since the result of sequenceS has a constraint >>, which cannot be met by an interface due to possible declaration merging (see this TypeScript issue, for example). And that constraint was already present in 2019, which is way before the blog post was written.

            Anyhow, you can get the example to work by declaring OrderHKD as a type rather than an interface:

            Source https://stackoverflow.com/questions/71490052

            QUESTION

            TypeScript: implementing pipe function using tuple
            Asked 2022-Mar-11 at 15:05

            Playground Link

            I am implementing a pipe function but with one difference from regular implementations: rather than taking functions as arguments, it must accept an array of functions passed as a single argument.

            Like most implementations, my pipe implementation captures the input and output types of each function using type varaibles.

            ...

            ANSWER

            Answered 2022-Mar-11 at 15:05

            This appears not to be possible currently (v4.6).

            Meta-issue: Use Full Unification for Generic Inference? #30134 tracks the overarching problem.

            This comment may shed light on the mechanism TS uses to infer in this scenario.

            Source https://stackoverflow.com/questions/70462222

            QUESTION

            Generically extract a value from typed Record
            Asked 2022-Mar-09 at 19:49

            I am using fp-ts and in this case, Options. Lets say I have an example type:

            ...

            ANSWER

            Answered 2022-Mar-09 at 19:49

            You can extract the type of the option using a conditional type. You can then use a generic function to capture the type of the record type (lets call it T), and the type of the key (lets call it K). With this information you can then create the required type, by omitting K from T and intersecting it with the an object type that contains just K with the type of the option:

            Source https://stackoverflow.com/questions/71413045

            QUESTION

            How to extract value type from object and keys in typescript
            Asked 2022-Feb-28 at 13:12

            I am using arg and fp-ts. I want to have a function that returns type based on one of the inputs key value.

            ...

            ANSWER

            Answered 2022-Feb-28 at 13:12

            I couldn't make it work with arg library. But I was able to extract type with command-line-args

            Source https://stackoverflow.com/questions/71274825

            QUESTION

            How to test TaskEither form fp-ts with jest
            Asked 2022-Feb-28 at 13:07

            I am new to fp-ts. Let's say I have a function (path: string) => TaskEither which reads and parses config, and I want to write a test for that.

            So far I have:

            ...

            ANSWER

            Answered 2022-Feb-28 at 13:07

            I was missing function call.

            It should have been:

            Source https://stackoverflow.com/questions/71243594

            QUESTION

            How to flatten TaskEither> in FP-TS
            Asked 2022-Feb-23 at 17:15

            I am new to fp-ts. I am used to scala for comprehensions when dealing with combining Either, IO and ... The question is, let's say we have function with signatures

            ...

            ANSWER

            Answered 2022-Feb-23 at 17:15

            One way to go about this is to simply pick TaskEither as your monad of choice, and lift everything else into it.

            Source https://stackoverflow.com/questions/71232280

            QUESTION

            Using POJOs in fp-ts
            Asked 2022-Feb-14 at 08:49

            I want to do what I think is the simplest thing, map through a plain old Javascript object, using fp-ts constructs.

            There are a lot of operators I would like to use — map, filterMap, and so on — but they seem to require the Map type (which I assume is the Javascript Map object) — and there does not seem to be any easy way to convert back and forth between Map and Javascript object, which in Typescript is the standard representation of algebraic data types and of its Record type.

            This seems like a pretty big hole. Please don’t tell me I have to switch to lodash...

            ...

            ANSWER

            Answered 2022-Feb-14 at 08:49

            fp-ts/Record lets you work with Record as if they were a Functor in V, so you can have

            Source https://stackoverflow.com/questions/71097817

            QUESTION

            How do I convert this to a Point-free function
            Asked 2022-Feb-12 at 05:13
            import { chain, map, Apply } from "fp-ts/lib/IO";
            import { log } from "fp-ts/lib/Console";
            import { pipe } from "fp-ts/lib/function";
            import * as D from "fp-ts/lib/Date";
            import { sequenceT } from "fp-ts/lib/Apply";
            import { v4 as uuidv4 } from "uuid";
            
            export const Article = (title: string) =>
              ([id, now]: [string, Date]) => ({
                id,
                title,
                createdAt: now
              });
            
            const createArticle = (title: string) =>
              pipe(sequenceT(Apply)(uuidv4, D.create), map(Article(title)));
            
            const program = pipe(
              createArticle("hello"),
              chain(log)
            );
            
            program();
            
            
            ...

            ANSWER

            Answered 2022-Feb-12 at 05:13

            You can do the piping in reverse by applying the values to the function using ap. I had to create a function that helps TypeScript figure out the type of of.

            Source https://stackoverflow.com/questions/71082006

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install fp-ts

            To install the stable version:. Make sure to always have a single version of fp-ts installed in your project. Multiple versions are known to cause tsc to hang during compilation. You can check the versions currently installed using npm ls fp-ts (make sure there's a single version and all the others are marked as deduped).

            Support

            Disclaimer. Teaching functional programming is out of scope of this project, so the documentation assumes you already know what FP is.
            Find more information at:

            Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items

            Find more libraries

            Stay Updated

            Subscribe to our newsletter for trending solutions and developer bootcamps

            Agree to Sign up and Terms & Conditions

            Share this Page

            share link

            Consider Popular Functional Programming Libraries

            ramda

            by ramda

            mostly-adequate-guide

            by MostlyAdequate

            scala

            by scala

            guides

            by thoughtbot

            fantasy-land

            by fantasyland

            Try Top Libraries by gcanti

            io-ts

            by gcantiTypeScript

            tcomb-form-native

            by gcantiJavaScript

            tcomb

            by gcantiJavaScript

            tcomb-form

            by gcantiJavaScript

            monocle-ts

            by gcantiTypeScript