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// 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));
};
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