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stdlib/lib/node_modules/@stdlib/assert/is-probability at develop · stdlib-js/stdlib

isProbability

Test if a value is a probability.

A probability is defined as a numeric value on the interval [0,1].

Usage

var isProbability = require( '@stdlib/assert/is-probability' );

isProbability( value )

Tests if a value is a probability.

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

var bool = isProbability( 0.5 );
// returns true

bool = isProbability( new Number( 0.5 ) );
// returns true

bool = isProbability( 3.14 );
// returns false

bool = isProbability( -5.0 );
// returns false

bool = isProbability( NaN );
// returns false

bool = isProbability( null );
// returns false

isProbability.isPrimitive( value )

Tests if a value is a primitive probability.

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

var bool = isProbability.isPrimitive( 0.33 );
// returns true

bool = isProbability.isPrimitive( new Number( 0.33 ) );
// returns false

isProbability.isObject( value )

Tests if a value is a Number object having a value which is a probability.

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

var bool = isProbability.isObject( 0.11 );
// returns false

bool = isProbability.isObject( new Number( 0.11 ) );
// returns true

Examples

var Number = require( '@stdlib/number/ctor' );
var isProbability = require( '@stdlib/assert/is-probability' );

var bool = isProbability( 0.5 );
// returns true

bool = isProbability( new Number( 0.5 ) );
// returns true

bool = isProbability( 0.0 );
// returns true

bool = isProbability( 1.0 );
// returns true

bool = isProbability( 3.14 );
// returns false

bool = isProbability( -5.0 );
// returns false

bool = isProbability( NaN );
// returns false

bool = isProbability( '0.5' );
// returns false

bool = isProbability( null );
// returns false

See Also