| // Thanks for hints: https://github.com/paulmillr/es6-shim |
| |
| "use strict"; |
| |
| var some = Array.prototype.some |
| , abs = Math.abs |
| , sqrt = Math.sqrt |
| , compare = function (val1, val2) { return val2 - val1; } |
| , divide = function (value) { return value / this; } |
| , add = function (sum, number) { return sum + number * number; }; |
| |
| // eslint-disable-next-line no-unused-vars |
| 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 false; |
| } |
| if (!isFinite(val)) { |
| result = Infinity; |
| return true; |
| } |
| if (result !== undefined) return false; |
| val = Number(val); |
| if (val === 0) return false; |
| if (numbers) numbers.push(abs(val)); |
| else numbers = [abs(val)]; |
| return false; |
| }); |
| if (result !== undefined) return result; |
| if (!numbers) return 0; |
| |
| numbers.sort(compare); |
| return numbers[0] * sqrt(numbers.map(divide, numbers[0]).reduce(add, 0)); |
| }; |
