# @stdlib/utils-uncurry-right

0.2.1 • Public • Published

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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;
}

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;
}

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'```

## 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.

## Package Sidebar

### Install

`npm i @stdlib/utils-uncurry-right`

### Repository

github.com/stdlib-js/utils-uncurry-right

stdlib.io

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0.2.1

Apache-2.0

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