utils-async-function-sequence

Function sequence.

https://github.com/stdlib-js/utils-async-function-sequence

Science Score: 44.0%

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CITATION.cff file
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Scientific vocabulary similarity
Low similarity (15.4%) to scientific vocabulary

Keywords

async asynchronous fcn fun func function funseq javascript node node-js nodejs pipe pipeline pipelining seq sequence stdlib util utilities utils

Scientific Fields

Biology Life Sciences - 40% confidence

Last synced: 4 months ago · JSON representation ·

Repository

Function sequence.

Basic Info

Host: GitHub
Owner: stdlib-js
License: apache-2.0
Language: JavaScript
Default Branch: main
Homepage: https://github.com/stdlib-js/stdlib
Size: 858 KB

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Stars: 1
Watchers: 4
Forks: 0
Open Issues: 0
Releases: 0

Topics

async asynchronous fcn fun func function funseq javascript node node-js nodejs pipe pipeline pipelining seq sequence stdlib util utilities utils

Created over 4 years ago · Last pushed 7 months ago

Metadata Files

Readme Changelog Contributing License Code of conduct Citation Security

We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.

The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.

When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.

To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!

funseqAsync

Function sequence.

## Installation ```bash npm install @stdlib/utils-async-function-sequence ``` Alternatively, - To load the package in a website via a `script` tag without installation and bundlers, use the [ES Module][es-module] available on the [`esm`][esm-url] branch (see [README][esm-readme]). - If you are using Deno, visit the [`deno`][deno-url] branch (see [README][deno-readme] for usage intructions). - For use in Observable, or in browser/node environments, use the [Universal Module Definition (UMD)][umd] build available on the [`umd`][umd-url] branch (see [README][umd-readme]). The [branches.md][branches-url] file summarizes the available branches and displays a diagram illustrating their relationships. To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.

## Usage ```javascript var funseqAsync = require( '@stdlib/utils-async-function-sequence' ); ``` #### funseqAsync( ...fcn ) Returns a pipeline function. Starting from the left, the pipeline function evaluates each function and passes the result as the first argument to the next function. The result of the rightmost function is the result of the whole. ```javascript function a( x, next ) { setTimeout( onTimeout, 0 ); function onTimeout() { next( null, 2*x ); } } function b( x, next ) { setTimeout( onTimeout, 0 ); function onTimeout() { next( null, x+3 ); } } function c( x, next ) { setTimeout( onTimeout, 0 ); function onTimeout() { next( null, x/5 ); } } var f = funseqAsync( a, b, c ); function done( error, result ) { if ( error ) { throw error; } console.log( result ); // => 3 } f( 6, done ); // ((2*x)+3)/5 ``` The last argument provided to each function is a `next` callback which accepts two arguments: - **error**: error argument. - **result**: function result. **Only** the leftmost function is explicitly permitted to accept multiple arguments. All other functions are evaluated as **binary** functions. ```javascript function a( x, y, next ) { setTimeout( onTimeout, 0 ); function onTimeout() { next( null, (x*5) + (y*3) ); } } function b( r, next ) { setTimeout( onTimeout, 0 ); function onTimeout() { next( null, r+12 ); } } var f = funseqAsync( a, b ); function done( error, result ) { if ( error ) { throw error; } console.log( result ); // => 50 } f( 4, 6, done ); ```

## Notes - The function will throw if provided fewer than `2` input arguments. - If a provided function calls the `next` callback with a truthy `error` argument, the pipeline function suspends execution and immediately calls the `done` callback for subsequent `error` handling. - Execution is **not** guaranteed to be asynchronous. To guarantee asynchrony, wrap the `done` callback in a function which either executes at the end of the current stack (e.g., `nextTick`) or during a subsequent turn of the event loop (e.g., `setImmediate`, `setTimeout`). - The difference between this function and [`composeAsync`][@stdlib/utils/async/compose] is that this function evaluates input arguments from left-to-right, rather than right-to-left.

## Examples ```javascript var funseqAsync = require( '@stdlib/utils-async-function-sequence' ); function a( x, y, next ) { setTimeout( onTimeout, 0 ); function onTimeout() { next( null, x*y ); } } function b( z, next ) { setTimeout( onTimeout, 0 ); function onTimeout() { next( null, z+5 ); } } function c( r, next ) { setTimeout( onTimeout, 0 ); function onTimeout() { next( null, r/10 ); } } var f = funseqAsync( a, b, c ); function done( error, result ) { if ( error ) { throw error; } console.log( result ); // => 2 } f( 5, 3, done ); ```

* * * ## Notice This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more. For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib]. #### Community [![Chat][chat-image]][chat-url] --- ## License See [LICENSE][stdlib-license]. ## Copyright Copyright © 2016-2025. The Stdlib [Authors][stdlib-authors].

Owner

Name: stdlib
Login: stdlib-js
Kind: organization

Website: https://stdlib.io
Twitter: stdlibjs
Repositories: 3,692
Profile: https://github.com/stdlib-js

Standard library for JavaScript.

Citation (CITATION.cff)

cff-version: 1.2.0
title: stdlib
message: >-
  If you use this software, please cite it using the
  metadata from this file.

type: software

authors:
  - name: The Stdlib Authors
    url: https://github.com/stdlib-js/stdlib/graphs/contributors

repository-code: https://github.com/stdlib-js/stdlib
url: https://stdlib.io

abstract: |
  Standard library for JavaScript and Node.js.

keywords:
  - JavaScript
  - Node.js
  - TypeScript
  - standard library
  - scientific computing
  - numerical computing
  - statistical computing

license: Apache-2.0 AND BSL-1.0

date-released: 2016

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Avg Commits per committer: 50.0
Development Distribution Score (DDS): 0.0

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Total packages: 1
Total downloads:
- npm 18 last-month

Total dependent packages: 3
Total dependent repositories: 1
Total versions: 13
Total maintainers: 4

npmjs.org: @stdlib/utils-async-function-sequence

Function sequence.

Homepage: https://stdlib.io
License: Apache-2.0
Latest release: 0.2.2
published over 1 year ago

Versions: 13
Dependent Packages: 3
Dependent Repositories: 1
Downloads: 18 Last month

Rankings

Dependent packages count: 5.9%

Dependent repos count: 10.3%

Average: 13.2%

Forks count: 15.4%

Stargazers count: 16.7%

Downloads: 17.4%

Maintainers (4)

planeshifter rreusser stdlib-bot kgryte

Funding

type: opencollective
url: https://opencollective.com/stdlib

Last synced: 4 months ago

Dependencies

package.json npm

@stdlib/bench ^0.0.x development
@stdlib/math-base-assert-is-nan ^0.0.x development
@stdlib/random-base-randu ^0.0.x development
@stdlib/utils-noop ^0.0.x development
istanbul ^0.4.1 development
tap-spec 5.x.x development
tape git+https://github.com/kgryte/tape.git#fix/globby development
@stdlib/assert-is-function ^0.0.x
@stdlib/string-format ^0.0.x

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utils-async-function-sequence

Science Score: 44.0%

Keywords

Scientific Fields

Repository

Basic Info

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Metadata Files

README.md

funseqAsync

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npmjs.org: @stdlib/utils-async-function-sequence

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