38 lines
1,000 B
JavaScript
38 lines
1,000 B
JavaScript
|
// 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));
|
||
|
|
};
|