haw-utils/lib/math/plus.js

一个基于业务场景的工具方法库

(function (global, factory) {
  if (typeof define === "function" && define.amd) {
    define(["exports", "../utils/math.util", "./times"], factory);
  } else if (typeof exports !== "undefined") {
    factory(exports, require("../utils/math.util"), require("./times"));
  } else {
    var mod = {
      exports: {}
    };
    factory(mod.exports, global.utilsMathUtil, global.times);
    global.plus = mod.exports;
  }
})(typeof globalThis !== "undefined" ? globalThis : typeof self !== "undefined" ? self : this, function (_exports, _math, _times) {
  "use strict";

  Object.defineProperty(_exports, "__esModule", {
    value: true
  });
  _exports["default"] = void 0;
  _times = _interopRequireDefault(_times);
  function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { "default": obj }; }
  /**
   * 精确加法，支持多个数相加
   * 
   * @static
   * @alias module:Math.plus
   * @since 3.1.0
   * @param {Number} num1 相加的第一个数
   * @param {Number} num2 相加的第二个数
   * @param {Number} [others] 相加的其余数
   * @returns {Number} 总和
   * @example
   * 
   *  plus(0.1, 0.2);
   *  // => 0.3
   * 
   *  plus(0.1, 0.2, 0.3);
   *  // => 0.6
   * 
   *  plus(0.1, 0.2, 0.3, 0.4);
   *  // => 1
   */
  function plus(num1, num2) {
    for (var _len = arguments.length, others = new Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {
      others[_key - 2] = arguments[_key];
    }
    if (others.length > 0) {
      return plus.apply(void 0, [plus(num1, num2)].concat(others));
    }
    var baseNum = Math.pow(10, Math.max((0, _math.digitLength)(num1), (0, _math.digitLength)(num2)));
    return ((0, _times["default"])(num1, baseNum) + (0, _times["default"])(num2, baseNum)) / baseNum;
  }
  var _default = plus;
  _exports["default"] = _default;
});