util-helpers/lib/plus.js

一个基于业务场景的工具方法库

'use strict';

var ut2 = require('ut2');
var math_util = require('./utils/math.util.js');
var times = require('./times.js');

function plus() {
    var nums = [];
    for (var _i = 0; _i < arguments.length; _i++) {
        nums[_i] = arguments[_i];
    }
    var num1 = nums[0];
    var num2 = nums[1] === void 0 ? 0 : nums[1];
    var rest = nums.slice(2);
    if (rest.length > 0) {
        return plus.apply(void 0, [plus(num1, num2)].concat(rest));
    }
    num1 = math_util.transformEffectiveNumber(num1);
    num2 = math_util.transformEffectiveNumber(num2);
    if (ut2.isNaN(num1) || ut2.isNaN(num2)) {
        return Number.NaN;
    }
    var baseNum = Math.pow(10, Math.max(math_util.digitLength(num1), math_util.digitLength(num2)));
    return (times(num1, baseNum) + times(num2, baseNum)) / baseNum;
}

module.exports = plus;