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https://github.com/stdlib-js/utils-papply-right

Partially apply function arguments from the right.
https://github.com/stdlib-js/utils-papply-right

apply args arguments arity fcn fun func function functional javascript node node-js nodejs partial partially stdlib transform util utilities utils

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Partially apply function arguments from the right.

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README 

        



  

    About stdlib...

  

  
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# papplyRight



[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] 



> Partially apply function arguments from the right.



## Installation



```bash

npm install @stdlib/utils-papply-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 papplyRight = require( '@stdlib/utils-papply-right' );

```



#### papplyRight( fcn\[, ...args] )



Partially applies function arguments from the right.



```javascript

function say( text, name ) {

    return text + ', ' + name + '.';

}



var toSusan = papplyRight( say, 'Susan B. Anthony' );



var str = toSusan( 'Thank you' );

// returns 'Thank you, Susan B. Anthony.'



str = toSusan( 'Never forget' );

// returns 'Never forget, Susan B. Anthony.'

```



## Notes



-   The implementation does **not** set the `length` of the returned function. Accordingly, the returned function `length` is **always** `0`.

-   The evaluation context is **always** `null`.

-   The difference between this function and [`papply`][@stdlib/utils/papply] is the order in which arguments are applied. This function fixes the rightmost arguments.



## Examples



```javascript

var randu = require( '@stdlib/random-base-randu' );

var floor = require( '@stdlib/math-base-special-floor' );

var papplyRight = require( '@stdlib/utils-papply-right' );



var fcn;

var x;

var y;

var z;

var v;

var i;



function add( x, y, z, w, t, s ) {

    return x + y + z + w + t + s;

}



fcn = papplyRight( add, 5, 4, 3 );



for ( i = 0; i < 100; i++ ) {

    x = floor( randu() * 5 );

    y = floor( randu() * 10 );

    z = floor( randu() * 15 );

    v = fcn( x, y, z );

    console.log( '%d+%d+%d+5+4+3 = %d', x, y, z, v );

}

```



* * *



## See Also



-   [`@stdlib/utils-papply`][@stdlib/utils/papply]: partially apply function 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 © 2016-2024. The Stdlib [Authors][stdlib-authors].



[npm-image]: http://img.shields.io/npm/v/@stdlib/utils-papply-right.svg

[npm-url]: https://npmjs.org/package/@stdlib/utils-papply-right



[test-image]: https://github.com/stdlib-js/utils-papply-right/actions/workflows/test.yml/badge.svg?branch=main

[test-url]: https://github.com/stdlib-js/utils-papply-right/actions/workflows/test.yml?query=branch:main



[coverage-image]: https://img.shields.io/codecov/c/github/stdlib-js/utils-papply-right/main.svg

[coverage-url]: https://codecov.io/github/stdlib-js/utils-papply-right?branch=main



[chat-image]: https://img.shields.io/gitter/room/stdlib-js/stdlib.svg

[chat-url]: https://app.gitter.im/#/room/#stdlib-js_stdlib:gitter.im



[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-papply-right/tree/deno

[deno-readme]: https://github.com/stdlib-js/utils-papply-right/blob/deno/README.md

[umd-url]: https://github.com/stdlib-js/utils-papply-right/tree/umd

[umd-readme]: https://github.com/stdlib-js/utils-papply-right/blob/umd/README.md

[esm-url]: https://github.com/stdlib-js/utils-papply-right/tree/esm

[esm-readme]: https://github.com/stdlib-js/utils-papply-right/blob/esm/README.md

[branches-url]: https://github.com/stdlib-js/utils-papply-right/blob/main/branches.md



[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/utils-papply-right/main/LICENSE



[@stdlib/utils/papply]: https://github.com/stdlib-js/utils-papply