@stdlib/utils-uncurry-right

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uncurryRight

Transform a curried function into a function invoked with multiple arguments.

Installation

npm install @stdlib/utils-uncurry-right

Usage

var uncurryRight = require( '@stdlib/utils-uncurry-right' );

uncurryRight( fcn[, arity][, thisArg] )

Transforms a curried function into a function invoked with multiple arguments.

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.

function add( y ) {
    return function add( x ) {
        return x + y;
    };
}

var fcn = uncurryRight( add, 2 );

var sum = fcn( 9 );
// throws <Error>

To specify an execution context, provide a thisArg argument.

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.

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 <Error>

Notes

• The difference between this function and uncurry is the order in which arguments are applied. This function applies arguments starting from the right.

Examples

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'

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See Also

• @stdlib/utils-curry: transform a function into a sequence of functions each accepting a single argument.
• @stdlib/utils-curry-right: transform a function into a sequence of functions each accepting a single argument.
• @stdlib/utils-uncurry: transform a curried function into a function invoked with multiple arguments.

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Notice

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.

Community

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License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.