npm package: @stdlib/complex-base-assert-is-same-value-zero
Description: Test whether two double-precision complex floating-point numbers are the same value.
Author: The Stdlib Authors
Latest version: 0.2.1

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# isSameValueZero

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

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<section class="intro">

</section>

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<!-- Package usage documentation. -->

<section class="installation">

## Installation

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

</section>

<section class="usage">

## Usage

```javascript
var isSameValueZero = require( '@stdlib/complex-base-assert-is-same-value-zero' );
```

#### isSameValueZero( z1, z2 )

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

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

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

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

In contrast to the strict equality operator `===`, the function treats `NaNs` as the same value.

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

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

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

In contrast to the [SameValue Algorithm][@stdlib/complex/base/assert/is-same-value] (as specified in ECMAScript 5), the function does not distinguish between `+0` and `-0`.

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

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

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

</section>

<!-- /.usage -->

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<section class="notes">

</section>

<!-- /.notes -->

<!-- Package usage examples. -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var Complex128 = require( '@stdlib/complex-float64' );
var isSameValueZero = require( '@stdlib/complex-base-assert-is-same-value-zero' );

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

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

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

</section>

<!-- /.examples -->

<!-- C interface documentation. -->

* * *

<section class="c">

## C APIs

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</section>

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<section class="usage">

### Usage

```c
#include "stdlib/complex/base/assert/is_same_value_zero.h"
```

#### stdlib_base_complex128_is_same_value_zero( z1, z2 )

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

```c
#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_zero( 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.

```c
bool stdlib_base_complex128_is_same_value_zero( const stdlib_complex128_t z1, const stdlib_complex128_t z2 );
```

</section>

<!-- /.usage -->

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<section class="notes">

</section>

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<!-- C API usage examples. -->

<section class="examples">

### Examples

```c
#include "stdlib/complex/base/assert/is_same_value_zero.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_zero( z[ i ], z[ i ] );
        printf( "Same value? %s\n", ( v ) ? "True" : "False" );
    }
}
```

</section>

<!-- /.examples -->

</section>

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* * *

## Notice

This package is part of [stdlib][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][stdlib], see the main project [repository][stdlib].

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---

## License

See [LICENSE][stdlib-license].


## Copyright

Copyright &copy; 2016-2024. The Stdlib [Authors][stdlib-authors].

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[@stdlib/complex/base/assert/is-same-value]: https://www.npmjs.com/package/@stdlib/complex-base-assert-is-same-value

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