@stdlib/utils-reject-arguments
TypeScript icon, indicating that this package has built-in type declarations

0.2.1 • Public • Published
About stdlib...

We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.

The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.

When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.

To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!

rejectArguments

NPM version Build Status Coverage Status

Create a function that invokes a provided function according to a predicate function.

Installation

npm install @stdlib/utils-reject-arguments

Usage

var rejectArguments = require( '@stdlib/utils-reject-arguments' );

rejectArguments( fcn, predicate[, thisArg] )

Returns a function that invokes a provided function according to a predicate function.

function foo( a, b ) {
    return [ a, b ];
}

function predicate( v ) {
    return ( v === 2 );
}

var bar = rejectArguments( foo, predicate );

var out = bar( 1, 2, 3 );
// returns [ 1, 3 ]

The predicate function is provided the following arguments:

  • value: argument value.
  • index: argument index.

To set the this context when invoking the input function, provide a thisArg.

function predicate( v ) {
    return ( v === 2 );
}

function Foo() {
    this.x = 1;
    this.y = 2;
}

Foo.prototype.scale = function scale( a, b ) {
    return [ this.x*a, this.y*b ];
};

var ctx = {
    'x': 10,
    'y': 20
};

var foo = new Foo();

var bar = rejectArguments( foo.scale, predicate, ctx );

var out = bar( 1, 2, 3 );
// returns [ 10, 60 ]

Notes

  • Only those arguments in which the predicate function returns a falsy value are applied to a provided function.

Examples

var filledarrayBy = require( '@stdlib/array-filled-by' );
var add = require( '@stdlib/math-base-ops-add' );
var rejectArguments = require( '@stdlib/utils-reject-arguments' );

function fill( i ) {
    return i;
}

function factory( i, j ) {
    return predicate;

    function predicate( value, index ) {
        return ( i > index ) || ( index >= j );
    }
}

// Create a data array:
var x = filledarrayBy( 10, 'float64', fill );

// Compute the sum of consecutive elements...
var f;
var i;
for ( i = 0; i < x.length-1; i++ ) {
    f = rejectArguments( add, factory( i, i+2 ) );
    console.log( 'sum(x_%d, x_%d) = %d', i, i+1, f.apply( null, x ) );
}

See Also


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

Chat


License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.

Package Sidebar

Install

npm i @stdlib/utils-reject-arguments

Homepage

stdlib.io

Weekly Downloads

13

Version

0.2.1

License

Apache-2.0

Unpacked Size

31.1 kB

Total Files

11

Last publish

Collaborators

  • stdlib-bot
  • kgryte
  • planeshifter
  • rreusser