--- /dev/null
+// Thanks for hints: https://github.com/paulmillr/es6-shim
+
+'use strict';
+
+var some = Array.prototype.some, abs = Math.abs, sqrt = Math.sqrt
+
+ , compare = function (a, b) { return b - a; }
+ , divide = function (x) { return x / this; }
+ , add = function (sum, number) { return sum + number * number; };
+
+module.exports = function (val1, val2/*, …valn*/) {
+ var result, numbers;
+ if (!arguments.length) return 0;
+ some.call(arguments, function (val) {
+ if (isNaN(val)) {
+ result = NaN;
+ return;
+ }
+ if (!isFinite(val)) {
+ result = Infinity;
+ return true;
+ }
+ if (result !== undefined) return;
+ val = Number(val);
+ if (val === 0) return;
+ if (!numbers) numbers = [abs(val)];
+ else numbers.push(abs(val));
+ });
+ if (result !== undefined) return result;
+ if (!numbers) return 0;
+
+ numbers.sort(compare);
+ return numbers[0] * sqrt(numbers.map(divide, numbers[0]).reduce(add, 0));
+};