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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
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.
