https://github.com/mearns/fp-try

A Try encapsulates the result of an operation that may have failed.
https://github.com/mearns/fp-try

either error error-handling errors failure functional functional-programming javascript optional scala try try-catch typescript

Last synced: about 2 months ago
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A Try encapsulates the result of an operation that may have failed.

• Host: GitHub
• URL: https://github.com/mearns/fp-try
• Owner: mearns
• License: mit
• Created: 2019-10-22T01:32:08.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2023-01-05T07:47:40.000Z (about 2 years ago)
• Last Synced: 2024-11-08T16:06:27.503Z (3 months ago)
• Topics: either, error, error-handling, errors, failure, functional, functional-programming, javascript, optional, scala, try, try-catch, typescript
• Language: JavaScript
• Homepage: https://mearns.github.io/fp-try/
• Size: 553 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 5
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# fp-try

[**Web Site**](https://mearns.github.io/fp-try/)

A functional-programming `Try` interface, inspired by the Scala type. A `Try` represents

the results of an operation that may have failed, encapsulating either the successful result

as a `Success`, or the error as a `Failure`.

```typescript

const DEFAULT_USER: User = buildDefaultUser();

function getUser(userName: string): User {

    return Try.apply(getDatabaseCredentials)

        .map((c: Creds) => fetchUserDetails(c, userName))

        .map(mapResultsToUser)

        .getOrElse(DEFAULT_USER);

}

function getDatabaseCredentials(): Creds {

    /* ... */

}

function fetchUserDetails(c: Creds, userName: string): ResultSet {

    /* ... */

}

function mapResultsToUser(rs: ResultSet): User {

    /* ... */

}

```

For details on the API, see https://mearns.github.io/fp-try/.

There are a lot of anti-patterns with this type. For more information on how to use

it effectively, see our article:

["Do or Do Not: Patterns and Antipatterns with the Try type"](https://medium.com/software-ascending/do-or-do-not-patterns-and-antipatterns-with-the-try-type-c77a63f74cc9)