iterRound2

Create an iterator which rounds each iterated value to the nearest power of two on a linear scale.

Usage

var iterRound2 = require( '@stdlib/math/iter/special/round2' );

iterRound2( iterator )

Returns an iterator which rounds each iterated value to the nearest power of two on a linear scale.

var array2iterator = require( '@stdlib/array/to-iterator' );

var it = iterRound2( array2iterator( [ 9.5, 13.0, -13.0 ] ) );
// returns <Object>

var r = it.next().value;
// returns 8.0

r = it.next().value;
// returns 16.0

r = it.next().value;
// returns -16.0

// ...

The returned iterator protocol-compliant object has the following properties:

• next: function which returns an iterator protocol-compliant object containing the next iterated value (if one exists) assigned to a value property and a done property having a boolean value indicating whether the iterator is finished.
• return: function which closes an iterator and returns a single (optional) argument in an iterator protocol-compliant object.

Notes

• If an iterated value is non-numeric (including NaN), the returned iterator returns NaN. If non-numeric iterated values are possible, you are advised to provide an iterator which type checks and handles non-numeric values accordingly.
• If an environment supports Symbol.iterator and a provided iterator is iterable, the returned iterator is iterable.

Examples

var uniform = require( '@stdlib/random/iter/uniform' );
var iterRound2 = require( '@stdlib/math/iter/special/round2' );

// Create a seeded iterator for generating pseudorandom numbers:
var rand = uniform( -200.0, 200.0, {
    'seed': 1234,
    'iter': 10
});

// Create an iterator which consumes the pseudorandom number iterator:
var it = iterRound2( rand );

// Perform manual iteration...
var r;
while ( true ) {
    r = it.next();
    if ( r.done ) {
        break;
    }
    console.log( r.value );
}

---

See Also

• @stdlib/math/base/special/round2: round a numeric value to the nearest power of two on a linear scale.
• @stdlib/math/iter/special/ceil2: create an iterator which rounds each iterated value to the nearest power of two toward positive infinity.
• @stdlib/math/iter/special/floor2: create an iterator which rounds each iterated value to the nearest power of two toward negative infinity.
• @stdlib/math/iter/special/round: create an iterator which rounds each iterated value to the nearest integer.
• @stdlib/math/iter/special/round10: create an iterator which rounds each iterated value to the nearest power of 10 on a linear scale.
• @stdlib/math/iter/special/trunc2: create an iterator which rounds each iterated value to the nearest power of two toward zero.