isNegativeZero

Test if a value is a number equal to negative zero.

Usage

var isNegativeZero = require( '@stdlib/assert/is-negative-zero' );

isNegativeZero( value )

Tests if a value is a number having a value equal to negative zero.

var Number = require( '@stdlib/number/ctor' );

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

bool = isNegativeZero( new Number( -0.0 ) );
// returns true

bool = isNegativeZero( -3.14 );
// returns false

bool = isNegativeZero( 0.0 );
// returns false

bool = isNegativeZero( null );
// returns false

isNegativeZero.isPrimitive( value )

Tests if a value is a primitive number equal to negative zero.

var Number = require( '@stdlib/number/ctor' );

var bool = isNegativeZero.isPrimitive( -0.0 );
// returns true

bool = isNegativeZero.isPrimitive( new Number( -0.0 ) );
// returns false

isNegativeZero.isObject( value )

Tests if a value is a Number object having a value equal to negative zero.

var Number = require( '@stdlib/number/ctor' );

var bool = isNegativeZero.isObject( -0.0 );
// returns false

bool = isNegativeZero.isObject( new Number( -0.0 ) );
// returns true

Examples

var Number = require( '@stdlib/number/ctor' );
var isNegativeZero = require( '@stdlib/assert/is-negative-zero' );

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

bool = isNegativeZero( new Number( -0.0 ) );
// returns true

bool = isNegativeZero( -3.14 );
// returns false

bool = isNegativeZero( 0.0 );
// returns false

bool = isNegativeZero( 5.0 );
// returns false

bool = isNegativeZero( '-0' );
// returns false

bool = isNegativeZero( null );
// returns false