float64-to-float32

$Build Status$ $Coverage Status$ $Dependencies$

Converts a double-precision floating-point number to the nearest single-precision floating-point number.

Installation

$ npm install float64-to-float32

Usage

var float64ToFloat32 = require( 'float64-to-float32' );

float64ToFloat32( x )

Converts a double-precision floating-point number to the nearest single-precision floating-point number.

var y = float64ToFloat32( 1.337 );
// returns 1.3370000123977661

Notes

This function may be used as a polyfill for the (poorly named) ES2015 built-in Math.fround.

Examples

var float64ToFloat32 = require( 'float64-to-float32' );
 
var f64;
var f32;
var i;
 
// Convert random double-precision floating-point numbers to the nearest single-precision floating-point number...
for ( i = 0; i < 1000; i++ ) {
    f64 = Math.random() * 100;
    f32 = float64ToFloat32( f64 );
    console.log( 'float64: %d => float32: %d', f64, f32 );
}

To run the example code from the top-level application directory,

$ node ./examples/index.js

Tests

Unit

This repository uses tape for unit tests. To run the tests, execute the following command in the top-level application directory:

$ make test

All new feature development should have corresponding unit tests to validate correct functionality.

Test Coverage

This repository uses Istanbul as its code coverage tool. To generate a test coverage report, execute the following command in the top-level application directory:

$ make test-cov

Istanbul creates a ./reports/coverage directory. To access an HTML version of the report,

$ make view-cov

Browser Support

This repository uses Testling for browser testing. To run the tests in a (headless) local web browser, execute the following command in the top-level application directory:

$ make test-browsers

To view the tests in a local web browser,

$ make view-browser-tests

License

MIT license.