@stdlib/number-float32-base-assert-is-same-value

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!

isSameValuef

Test if two single-precision floating-point numbers are the same value.

Installation

npm install @stdlib/number-float32-base-assert-is-same-value

Usage

var isSameValuef = require( '@stdlib/number-float32-base-assert-is-same-value' );

isSameValuef( a, b )

Tests if two single-precision floating-point numbers a and b are the same value.

var toFloat32 = require( '@stdlib/number-float64-base-to-float32' );

var bool = isSameValuef( toFloat32( 3.14 ), toFloat32( 3.14 ) );
// returns true

bool = isSameValuef( toFloat32( 5.0 ), toFloat32( 3.0 ) );
// returns false

In contrast to the strict equality operator ===, the function distinguishes between +0 and -0 and treats NaNs as the same value.

var bool = ( 0.0 === -0.0 );
// returns true

bool = isSameValuef( 0.0, -0.0 );
// returns false

bool = isSameValuef( -0.0, -0.0 );
// returns true

bool = ( NaN === NaN );
// returns false

bool = isSameValuef( NaN, NaN );
// returns true

Notes

• The function implements the SameValue Algorithm as specified in ECMAScript 5.

Examples

var toFloat32 = require( '@stdlib/number-float64-base-to-float32' );
var isSameValuef = require( '@stdlib/number-float32-base-assert-is-same-value' );

var bool = isSameValuef( toFloat32( 3.14 ), toFloat32( 3.14 ) );
// returns true

bool = isSameValuef( toFloat32( 0.0 ), toFloat32( 0.0 ) );
// returns true

bool = isSameValuef( toFloat32( -0.0 ), toFloat32( 0.0 ) );
// returns false

bool = isSameValuef( toFloat32( NaN ), toFloat32( NaN ) );
// returns true

---

C APIs

Usage

#include "stdlib/number/float32/base/assert/is_same_value.h"

stdlib_base_float32_is_same_value( a, b )

Tests if two single-precision floating-point numbers a and b are the same value.

#include <stdbool.h>

bool v = stdlib_base_float32_is_same_value( 3.14f, 3.14f );
// returns true

v = stdlib_base_float32_is_same_value( 0.0f, -0.0f );
// returns false

The function accepts the following arguments:

• a: [in] float first input value.
• b: [in] float second input value.

bool stdlib_base_float32_is_same_value( const float a, const float b );

Examples

#include "stdlib/number/float32/base/assert/is_same_value.h"
#include <stdbool.h>
#include <stdio.h>

int main( void ) {
    const float a[] = {
        5.0f,
        -2.0f,
        0.0f,
        0.0f/0.0f
    };
    const float b[] = {
        5.0f,
        2.0f,
        -0.0f,
        0.0f/0.0f
    };

    bool v;
    int i;
    for ( i = 0; i < 4; i++ ) {
        v = stdlib_base_float32_is_same_value( a[ i ], b[ i ] );
        printf( "Same value? %s\n", ( v ) ? "True" : "False" );
    }
}

---

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.

Copyright

Copyright © 2016-2024. The Stdlib Authors.

Changelog

0.2.2 (2024-07-27)

<section class="commits">

Commits

<details>

• d04dcbd - docs: remove private annotations in C comments (by Philipp Burckhardt)

</details> </section> <!-- /.commits --> <section class="contributors">

Contributors

A total of 1 person contributed to this release. Thank you to this contributor:

• Philipp Burckhardt

</section> <!-- /.contributors --> </section> <!-- /.release --> <section class="release" id="v0.2.1">