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NPM version Build Status Coverage Status

Partially apply function arguments from the right.


npm install @stdlib/utils-papply-right


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

papplyRight( fcn[, ...args] )

Partially applies function arguments from the right.

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.'


  • 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 is the order in which arguments are applied. This function fixes the rightmost arguments.


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


This package is part of 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, see the main project repository.





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  • stdlib-bot
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