https://github.com/stdlib-js/utils-uncurry-right
Transform a curried function into a function invoked with multiple arguments.
https://github.com/stdlib-js/utils-uncurry-right
apply curried curry fcn fun func function javascript node node-js nodejs partial partially stdlib uncurried uncurry uncurry-right util utilities utils
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Transform a curried function into a function invoked with multiple arguments.
- Host: GitHub
- URL: https://github.com/stdlib-js/utils-uncurry-right
- Owner: stdlib-js
- License: apache-2.0
- Created: 2021-06-14T13:31:08.000Z (about 5 years ago)
- Default Branch: main
- Last Pushed: 2026-06-01T03:37:19.000Z (19 days ago)
- Last Synced: 2026-06-01T05:14:31.559Z (19 days ago)
- Topics: apply, curried, curry, fcn, fun, func, function, javascript, node, node-js, nodejs, partial, partially, stdlib, uncurried, uncurry, uncurry-right, util, utilities, utils
- Language: JavaScript
- Homepage: https://github.com/stdlib-js/stdlib
- Size: 987 KB
- Stars: 2
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md
- Citation: CITATION.cff
- Security: SECURITY.md
- Notice: NOTICE
Awesome Lists containing this project
README
About stdlib...
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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!
# uncurryRight
[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url]
> Transform a curried function into a function invoked with multiple arguments.
## Installation
```bash
npm install @stdlib/utils-uncurry-right
```
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 uncurryRight = require( '@stdlib/utils-uncurry-right' );
```
#### uncurryRight( fcn\[, arity]\[, thisArg] )
Transforms a curried function into a function invoked with multiple arguments.
```javascript
function add( y ) {
return function add( x ) {
return x + y;
};
}
var fcn = uncurryRight( add );
var sum = fcn( 3, 2 );
// returns 5
```
To enforce a fixed number of parameters, provide an `arity` argument.
```javascript
function add( y ) {
return function add( x ) {
return x + y;
};
}
var fcn = uncurryRight( add, 2 );
var sum = fcn( 9 );
// throws
```
To specify an execution context, provide a `thisArg` argument.
```javascript
function addY( y ) {
this.y = y;
return addX;
}
function addX( x ) {
return x + this.y;
}
var fcn = uncurryRight( addY, {} );
var sum = fcn( 3, 2 );
// returns 5
```
The function supports providing both an `arity` and execution context.
```javascript
function addY( y ) {
this.y = y;
return addX;
}
function addX( x ) {
return x + this.y;
}
var fcn = uncurryRight( addY, 2, {} );
var sum = fcn( 3, 2 );
// returns 5
sum = fcn( 4 );
// throws
```
## Notes
- The difference between this function and [`uncurry`][@stdlib/utils/uncurry] is the order in which arguments are applied. This function applies arguments starting from the right.
## Examples
```javascript
var fromCodePoint = require( '@stdlib/string-from-code-point' );
var curryRight = require( '@stdlib/utils-curry-right' );
var uncurryRight = require( '@stdlib/utils-uncurry-right' );
var uncurried;
var curried;
var abcs;
var out;
var a;
var i;
function concat() {
var len;
var out;
var i;
len = arguments.length;
out = '';
for ( i = 0; i < len; i++ ) {
out += arguments[ i ];
if ( i < len-1 ) {
out += ',';
}
}
return out;
}
// Character codes:
a = 97;
abcs = new Array( 26 );
for ( i = 0; i < abcs.length; i++ ) {
abcs[ i ] = fromCodePoint( a + i );
}
out = concat.apply( null, abcs );
// returns 'a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z'
// Transform `concat` into a right curried function:
curried = curryRight( concat, 26 );
out = curried;
for ( i = abcs.length-1; i >= 0; i-- ) {
out = out( abcs[ i ] );
}
console.log( out );
// => 'a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z'
// Uncurry a right curried function:
uncurried = uncurryRight( curried );
out = uncurried.apply( null, abcs );
// returns 'a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z'
```
* * *
## See Also
- [`@stdlib/utils-curry`][@stdlib/utils/curry]: transform a function into a sequence of functions each accepting a single argument.
- [`@stdlib/utils-curry-right`][@stdlib/utils/curry-right]: transform a function into a sequence of functions each accepting a single argument.
- [`@stdlib/utils-uncurry`][@stdlib/utils/uncurry]: transform a curried function into a function invoked with multiple arguments.
* * *
## 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 © 2016-2026. The Stdlib [Authors][stdlib-authors].
[npm-image]: http://img.shields.io/npm/v/@stdlib/utils-uncurry-right.svg
[npm-url]: https://npmjs.org/package/@stdlib/utils-uncurry-right
[test-image]: https://github.com/stdlib-js/utils-uncurry-right/actions/workflows/test.yml/badge.svg?branch=main
[test-url]: https://github.com/stdlib-js/utils-uncurry-right/actions/workflows/test.yml?query=branch:main
[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/utils-uncurry-right/main.svg
[coverage-url]: https://codecov.io/github/stdlib-js/utils-uncurry-right?branch=main
[chat-image]: https://img.shields.io/badge/zulip-join_chat-brightgreen.svg
[chat-url]: https://stdlib.zulipchat.com
[stdlib]: https://github.com/stdlib-js/stdlib
[stdlib-authors]: https://github.com/stdlib-js/stdlib/graphs/contributors
[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules
[deno-url]: https://github.com/stdlib-js/utils-uncurry-right/tree/deno
[deno-readme]: https://github.com/stdlib-js/utils-uncurry-right/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/utils-uncurry-right/tree/umd
[umd-readme]: https://github.com/stdlib-js/utils-uncurry-right/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/utils-uncurry-right/tree/esm
[esm-readme]: https://github.com/stdlib-js/utils-uncurry-right/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/utils-uncurry-right/blob/main/branches.md
[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/utils-uncurry-right/main/LICENSE
[@stdlib/utils/curry]: https://github.com/stdlib-js/utils-curry
[@stdlib/utils/curry-right]: https://github.com/stdlib-js/utils-curry-right
[@stdlib/utils/uncurry]: https://github.com/stdlib-js/utils-uncurry