Extend Number.prototype with Math functions

number-math.js

(function (define, names) {

if (!define || !names.forEach) return;

names.forEach(function (name) {
	define(Number.prototype, name, {
		value: function () {
			return Math[name].apply(
				Math,
				[this].concat([].slice.call(arguments))
			);
		},
		writable: true,
		enumerable: false,
	});
});

}(Object.defineProperty, [
	'abs',
	'acos',
	'asin',
	'atan',
	'atan2',
	'ceil',
	'cos',
	'exp',
	'floor',
	'log',
	'max',
	'min',
	'pow',
	'round',
	'sin',
	'sqrt',
	'tan'
]));

test.js

#!/usr/bin/env js

load('number-math.js');

var k;

for (k in 4) {
	if ((4).hasOwnProperty(k)) {
		print('The test has failed! Reason: Number has enumerable features.');
		exit(1);
	}
}

var x = 2.1;

print(x.sqrt());
print(x.pow(2));
print(x.sin());