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isSameValue

Test whether two double-precision complex floating-point numbers are the same value.

Installation

npm install @stdlib/complex-base-assert-is-same-value

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 isSameValue = require( '@stdlib/complex-base-assert-is-same-value' );

isSameValue( z1, z2 )

Tests whether two double-precision complex floating-point numbers are the same value.

var Complex128 = require( '@stdlib/complex-float64' );

var z1 = new Complex128( 5.0, 3.0 );
var z2 = new Complex128( 5.0, 3.0 );

var out = isSameValue( z1, z2 );
// returns true

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

var Complex128 = require( '@stdlib/complex-float64' );

var z1 = new Complex128( NaN, NaN );
var z2 = new Complex128( NaN, NaN );

var out = isSameValue( z1, z2 );
// returns true

z1 = new Complex128( -0.0, 0.0 );
z2 = new Complex128( 0.0, -0.0 );

out = isSameValue( z1, z2 );
// returns false

Notes

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

Examples

var Complex128 = require( '@stdlib/complex-float64' );
var isSameValue = require( '@stdlib/complex-base-assert-is-same-value' );

var z1 = new Complex128( 5.0, 3.0 );
var z2 = new Complex128( 5.0, 3.0 );
var out = isSameValue( z1, z2 );
// returns true

z1 = new Complex128( -5.0, -3.0 );
z2 = new Complex128( 5.0, 3.0 );
out = isSameValue( z1, z2 );
// returns false

z1 = new Complex128( NaN, 3.0 );
z2 = new Complex128( NaN, 3.0 );
out = isSameValue( z1, z2 );
// returns true

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C APIs

Usage

#include "stdlib/complex/base/assert/is_same_value.h"

stdlib_base_complex128_is_same_value( z1, z2 )

Tests whether two double-precision complex floating-point numbers are the same value.

#include "stdlib/complex/float64.h"
#include <stdbool.h>

stdlib_complex128_t z1 = stdlib_complex128( 5.0, 2.0 );
stdlib_complex128_t z2 = stdlib_complex128( 5.0, 2.0 );

bool v = stdlib_base_complex128_is_same_value( z1, z2 );

The function accepts the following arguments:

• z1: [in] stdlib_complex128_t first double-precision complex floating-point number.
• z2: [in] stdlib_complex128_t second double-precision complex floating-point number.

bool stdlib_base_complex128_is_same_value( const stdlib_complex128_t z1, const stdlib_complex128_t z2 );

Examples

#include "stdlib/complex/base/assert/is_same_value.h"
#include "stdlib/complex/float64.h"
#include <stdbool.h>
#include <stdio.h>

int main( void ) {
    const stdlib_complex128_t z[] = {
        stdlib_complex128( 5.0, 2.0 ),
        stdlib_complex128( -2.0, 1.0 ),
        stdlib_complex128( 0.0, -0.0 ),
        stdlib_complex128( 0.0/0.0, 0.0/0.0 )
    };

    bool v;
    int i;
    for ( i = 0; i < 4; i++ ) {
        v = stdlib_base_complex128_is_same_value( z[ i ], z[ i ] );
        printf( "Same value? %s\n", ( v ) ? "True" : "False" );
    }
}

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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

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License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.