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uncurry

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

Installation

npm install @stdlib/utils-uncurry

Alternatively,

To load the package in a website via a script tag without installation and bundlers, use the ES Module available on the esm branch (see README).
If you are using Deno, visit the deno branch (see README for usage intructions).
For use in Observable, or in browser/node environments, use the Universal Module Definition (UMD) build available on the umd branch (see README).

The branches.md 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

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

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

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

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

var fcn = uncurry( add );

var sum = fcn( 2, 3 );
// returns 5

To enforce a fixed number of parameters, provide an arity argument.

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

var fcn = uncurry( add, 2 );

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

To specify an execution context, provide a thisArg argument.

function addX( x ) {
    this.x = x;
    return addY;
}

function addY( y ) {
    return this.x + y;
}

var fcn = uncurry( addX, {} );

var sum = fcn( 2, 3 );
// returns 5

The function supports providing both an arity and execution context.

function addX( x ) {
    this.x = x;
    return addY;
}

function addY( y ) {
    return this.x + y;
}

var fcn = uncurry( addX, 2, {} );

var sum = fcn( 2, 3 );
// returns 5

sum = fcn( 4 );
// throws <Error>

Examples

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

var uncurried;
var curried;
var bool;
var out;
var i;

function add( x, y, z, w, t, s ) {
    return x + y + z + w + t + s;
}

out = add( 0, 10, 20, 30, 40, 50 );
// returns 150

// Transform `add` into a curried function:
curried = curry( add );
out = curried;
for ( i = 0; i < add.length; i++ ) {
    out = out( i*10 );
}
bool = ( out === 150 );
// returns true

// Uncurry a curried function:
uncurried = uncurry( curried );

out = uncurried( 0, 10, 20, 30, 40, 50 );
// returns 150

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

License

See LICENSE.

stdlib-js/utils-uncurry