stdlib-jsWe 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!
Constant Function
[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url]
Constant function.
function whose output value is the same for every input value.
bash
npm install @stdlib/utils-constant-function
javascript
var constantFunction = require( '@stdlib/utils-constant-function' );
#### constantFunction( x )
Returns a [constant function][constant-function] which always returns x.
javascript
var fcn = constantFunction( 'beep' );
// returns <Function>
var v = fcn();
// returns 'beep'
v = fcn();
// returns 'beep'
function always returns the same reference.
javascript
var obj = {};
var fcn = constantFunction( obj );
var bool = ( fcn() === obj );
// returns true
javascript
var constantFunction = require( '@stdlib/utils-constant-function' );
var bool;
var fcn;
var arr;
var v;
var i;
fcn = constantFunction( 3.14 );
for ( i = 0; i < 10; i++ ) {
v = fcn();
// returns 3.14
}
arr = [ 1, 2, 3 ];
fcn = constantFunction( arr );
for ( i = 0; i < 10; i++ ) {
v = fcn();
bool = ( v === arr );
// returns true
}
@stdlib/utils-argument-function][@stdlib/utils/argument-function]: argument function.
- [@stdlib/utils-identity-function][@stdlib/utils/identity-function]: identity function.
