├── LICENSE
├── README.md
├── package.json
└── src
    └── index.js


/LICENSE:
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 1 | MIT License
 2 | 
 3 | Copyright (c) 2023 LiuXIn011
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 | 


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/README.md:
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 1 | <p align="center">
 2 |   <img width="500px" src="https://user-images.githubusercontent.com/48080203/221122496-e235dae4-b70c-4540-a273-b3cb46cf42e9.png">
 3 |   <p align="center">JavaScript的基础计算库</p>
 4 | </p>
 5 | <p align="center">
 6 |   <a href="https://www.npmjs.org/package/soeasymath">
 7 |     <img src="https://img.shields.io/npm/v/soeasymath.svg">
 8 |   </a>
 9 |   <a href="https://github.com/LiuXIn011/easyMath/blob/main/src/index.js">
10 |     <img src="https://img.shields.io/github/size/LiuXIn011/easyMath/src/index.js">
11 |   </a>
12 | </p>
13 | 
14 | 
15 | | 计算方法 | 方法名 | 别名|
16 | |--|--|--|
17 | | 加法 | addition | jiafa，jia |
18 | | 减法 |subtraction  |jianfa，jian  |
19 | | 乘法 |multiplication  | chengfa，cheng |
20 | | 除法 |division  | chufa，chu |
21 | | 科学计数法 | scientificNotationToString |/  |
22 | 
23 | ### 基本使用
24 | 
25 | ```javascript
26 | // 全量引入
27 | import soeasymath from "soeasymath"
28 | // 按需引入
29 | import { subtraction } from "soeasymath"
30 | ```
31 | ###### 加法
32 | ```javascript
33 | import { addition } from "soeasymath"
34 | console.log(addition(0.1,0.2,0.3....))
35 | ```
36 | ###### 减法
37 | ```javascript
38 | import { subtraction } from "soeasymath"
39 | console.log(subtraction(0.1,0.2,0.3....))
40 | ```
41 | ###### 乘法
42 | ```javascript
43 | import { multiplication } from "soeasymath"
44 | console.log(multiplication(0.1,0.2,0.3....))
45 | ```
46 | ###### 除法
47 | ```javascript
48 | import { division } from "soeasymath"
49 | console.log(division(0.1,0.2,0.3....))
50 | ```
51 | ###### 使用别名
52 | ```javascript
53 | import { jiafa } from "soeasymath"
54 | console.log(jiafa(0.1,0.2,0.3....))
55 | ```
56 | ###### 科学计数法
57 | ```javascript
58 | import { scientificNotationToString } from "soeasymath"
59 | console.log(scientificNotationToString(0.000000000000001))
60 | ```
61 | 


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/package.json:
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 1 | {
 2 |   "name": "soeasymath",
 3 |   "version": "2.0.1",
 4 |   "description": "soeasymath.js for Javascript",
 5 |   "main": "src/index.js",
 6 |   "scripts": {
 7 |     "test": "echo \"Error: no test specified\" && exit 1",
 8 |     "build": "build"
 9 |   },
10 |   "repository": {
11 |     "type": "git",
12 |     "url": "git+https://github.com/LiuXIn011/easyMath.git"
13 |   },
14 |   "keywords": [
15 |     "javascript",
16 |     "math"
17 |   ],
18 |   "author": "liuxin",
19 |   "license": "MIT",
20 |   "bugs": {
21 |     "url": "https://github.com/LiuXIn011/easyMath/issues"
22 |   },
23 |   "homepage": "https://github.com/LiuXIn011/easyMath#readme"
24 | }


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/src/index.js:
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  1 | // 放大指定倍数取整
  2 | const toInteger = function (number, times) {
  3 |   let maxDecimalDigits = 0
  4 |   // 如果是科学计数法
  5 |   if (String(number).indexOf("e") !== -1) {
  6 |     number = scientificNotationToString(number)
  7 |   }
  8 |   // 计算小数位数
  9 |   try {
 10 |     maxDecimalDigits = Math.max(maxDecimalDigits, String(number).split(".")[1].length)
 11 |   } catch (e) {
 12 |     maxDecimalDigits = 0
 13 |   }
 14 |   // 位数不足补0
 15 |   let mantissa = ''
 16 |   for (let i = 0; i < times - maxDecimalDigits; i++) {
 17 |     mantissa += '0'
 18 |   }
 19 |   // 返回结果
 20 |   if (maxDecimalDigits < times) {
 21 |     return Number(String(number).replace(".", "") + mantissa)
 22 |   } else {
 23 |     return Number(String(number).replace(".", ""))
 24 |   }
 25 | }
 26 | 
 27 | // 计算最长小数位数
 28 | const getMaxDecimalDigits = function () {
 29 |   let maxDecimalDigits = 0
 30 |   const numberList = arguments[0]
 31 |   for (let i = 0; i < numberList.length; i++) {
 32 |     // 如果是科学计数法
 33 |     if (String(numberList[i]).indexOf("e") !== -1) {
 34 |       numberList[i] = scientificNotationToString(numberList[i])
 35 |     }
 36 |     try {
 37 |       maxDecimalDigits = Math.max(maxDecimalDigits, String(numberList[i]).split(".")[1].length)
 38 |     } catch (e) {
 39 |       maxDecimalDigits = Math.max(maxDecimalDigits, 0)
 40 |     }
 41 |   }
 42 |   return maxDecimalDigits
 43 | }
 44 | // 科学计数法转字符串
 45 | const scientificNotationToString = function (number) {
 46 |   let numberString = String(number)
 47 |   try {
 48 |     // 正整数
 49 |     if (numberString.indexOf("e+") !== -1) {
 50 |       let mantissaLength = Number(String(number).split("e+")[1])
 51 |       // 组合0的个数
 52 |       let mantissa = ''
 53 |       for (let i = 0; i < mantissaLength; i++) {
 54 |         mantissa += '0'
 55 |       }
 56 |       return `${String(number).split("e+")[0]}${mantissa}`
 57 |       // 小数
 58 |     } else if (numberString.indexOf("e-") !== -1) {
 59 |       let mantissaLength = Number(String(number).split("e-")[1])
 60 |       // 组合0的个数
 61 |       let mantissa = ''
 62 |       for (let i = 0; i < mantissaLength - 1; i++) {
 63 |         mantissa += '0'
 64 |       }
 65 |       return `0.${mantissa}${String(number).split("e-")[0].replace(".", "")}`
 66 |     } else {
 67 |       // 其他
 68 |       return numberString
 69 |     }
 70 |   } catch (error) {
 71 |     return numberString
 72 |   }
 73 | }
 74 | // 除法
 75 | const division = function () {
 76 |   // 计算结果
 77 |   let maxDecimalDigits = getMaxDecimalDigits(arguments)
 78 |   let results = toInteger(arguments[0], maxDecimalDigits)
 79 |   for (let i = 1; i < arguments.length; i++) {
 80 |     results = results / toInteger(arguments[i], maxDecimalDigits)
 81 |   }
 82 |   // results = toInteger(results, arguments.length - 2)
 83 |   // 返回结果
 84 |   return results
 85 | }
 86 | // 除法别名
 87 | const chufa = division
 88 | const chu = division
 89 | 
 90 | // 乘法
 91 | const multiplication = function () {
 92 |   // 计算倍数
 93 |   let maxDecimalDigits = getMaxDecimalDigits(arguments)
 94 |   let times = Math.pow(10, maxDecimalDigits);
 95 |   // 计算结果
 96 |   let results = toInteger(arguments[0], maxDecimalDigits)
 97 |   for (let i = 1; i < arguments.length; i++) {
 98 |     results = results * toInteger(arguments[i], maxDecimalDigits)
 99 |   }
100 |   results = results / Math.pow(times, arguments.length);
101 |   // 返回结果
102 |   return results
103 | }
104 | // 乘法别名
105 | const chengfa = multiplication
106 | const cheng = multiplication
107 | 
108 | // 减法
109 | const subtraction = function () {
110 |   // 计算倍数
111 |   let maxDecimalDigits = getMaxDecimalDigits(arguments)
112 |   let times = Math.pow(10, maxDecimalDigits);
113 |   // 计算结果
114 |   let results = toInteger(arguments[0], maxDecimalDigits)
115 |   for (let i = 1; i < arguments.length; i++) {
116 |     results -= toInteger(arguments[i], maxDecimalDigits)
117 |   }
118 |   results = results / times
119 |   // 返回结果
120 |   return results
121 | }
122 | // 减法别名
123 | const jianfa = subtraction
124 | const jian = subtraction
125 | 
126 | // 加法
127 | const addition = function () {
128 |   // 计算倍数
129 |   let maxDecimalDigits = getMaxDecimalDigits(arguments)
130 |   let times = Math.pow(10, maxDecimalDigits);
131 |   // 计算结果
132 |   let results = 0
133 |   for (let i = 0; i < arguments.length; i++) {
134 |     results += toInteger(arguments[i], maxDecimalDigits)
135 |   }
136 |   results = results / times
137 |   // 返回结果
138 |   return results
139 | 
140 | }
141 | // 加法别名
142 | const jiafa = addition
143 | const jia = addition
144 | 
145 | module.exports = {
146 |   scientificNotationToString,
147 |   division,
148 |   chufa,
149 |   chu,
150 |   multiplication,
151 |   chengfa,
152 |   cheng,
153 |   subtraction,
154 |   jianfa,
155 |   jian,
156 |   addition,
157 |   jiafa,
158 |   jia,
159 | }


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