師大 Cumulative GPA 計算機

README.md

使用步驟

1. 把 main.js 存起來
2. 在同個資料夾跑 npm install xlsx
3. 在教務系統載成績報表，然後把報表的 path 放進 main.js 裡面（89 行）

4. $ node main.js
   [
     [ 2, 4.3 ], [ 2, 4 ],   [ 2, 4 ],
     [ 2, 3.7 ], [ 3, 4 ],   [ 3, 4 ],
     [ 3, 3.7 ], [ 1, 4.3 ], [ 3, 1 ],
     [ 2, 4 ],   [ 2, 3.7 ], [ 2, 4 ],
     [ 3, 2.7 ], [ 3, 1.7 ], [ 3, 3 ],
     [ 3, 2 ],   [ 3, 4 ],   [ 2, 4 ],
     [ 2, 2.7 ], [ 2, 0 ],   [ 0, 1.7 ],
     [ 3, 2 ],   [ 3, 2.3 ], [ 3, 2 ],
     [ 3, 3.3 ], [ 2, 3.7 ], [ 2, 3.3 ],
     [ 3, 3.7 ], [ 3, 3.3 ], [ 3, 2.3 ],
     [ 3, 1 ],   [ 2, 4 ],   [ 3, 4 ],
     [ 3, 4 ],   [ 3, 4 ],   [ 3, 4.3 ]
   ]
   Total credits: 90
   Total score: 113.7
   Cumulative GPA: 3.1333333333333333

特別感謝

• ChatGPT Plus 提供的 GPT-4 模型幫我完成讀取陰間微軟的 .xls 檔案

main.js

// Import required modules
const XLSX = require('xlsx');

// Function to read .xls file and process its data
function readXlsFile(filePath) {
  // Read the file
  const workbook = XLSX.readFile(filePath);

  // Get the first worksheet
  const sheetName = workbook.SheetNames[0];
  const worksheet = workbook.Sheets[sheetName];

  // Convert the worksheet to a JSON array
  const jsonData = XLSX.utils.sheet_to_json(worksheet, {header: 1});

  // Initialize an empty array to store the rows
  const rowsArray = [];

  // Iterate through the JSON array and push each row into rowsArray
  jsonData.forEach((row) => {
    const rowArray = [];

    row.forEach((cell) => {
      rowArray.push(cell);
    });

    rowsArray.push(rowArray);
  });

  // Return the final rows array
  return rowsArray;
}

function gradeToRawScore(grade) {
  let rawScore = NaN;

  switch (grade) {
    case 'A+':
      rawScore = 4.3;
      break;
      
    case 'A':
      rawScore = 4.0;
      break;
      
    case 'A-':
      rawScore = 3.7;
      break;
  
    case 'B+':
      rawScore = 3.3;
      break;
      
    case 'B':
      rawScore = 3.0;
      break;
      
    case 'B-':
      rawScore = 2.7;
      break;
  
    case 'C+':
      rawScore = 2.3;
      break;
      
    case 'C':
      rawScore = 2.0;
      break;
      
    case 'C-':
      rawScore = 1.7;
      break;

    case 'D':
      rawScore = 1.0;
      break;

    case 'E':
      rawScore = 0.0;
      break;
  
    default:
      throw new Error('Unexpected grade: ' + grade);
  }
  
  return rawScore;
}

const filePath = '/Users/birkhoff/Downloads/scoreExport.xls';
const rows = readXlsFile(filePath);

const converted = rows
  .slice(1)
  .filter(row => row[6] !== 'P' && row[6] !== '停修' && row[7] !== '另計')
  .map(row => [parseFloat(row[5]), gradeToRawScore(row[6])]);

console.log(converted)

let totalCredits = 0.0;
let totalScore = 0.0;
let temp = 0.0;

for (const course of converted) {
  totalCredits += course[0];
  totalScore += course[1];
  temp += course[0] * course[1];
}

console.log("Total credits:", totalCredits)
console.log("Total score:", totalScore)

console.log("Cumulative GPA:", temp / totalCredits)

英國的 GPA 是 4.0 滿分，師大是 4.3 滿分，所以要用這張圖對照找到自己的百分位，就是成績

對比 The University of Sheffield 的 international equivalent：