JS Lab 3

2026-03-06 21:27:16 -05:00
parent 1fdfbb1b4f
commit 41ebd4ac62
21 changed files with 1018 additions and 43 deletions
@@ -14,20 +14,73 @@ export function getPassingStudents(students, passMark = 70) {
    return passingStudents;
 }

-function calculateCourseAverages(students) {
-    
+export function calculateCourseAverages(students) {
+    const groupedCourses = students.reduce((accumulator, { course, grade }) => {
+        if (!accumulator[course]) {
+            accumulator[course] = { total: 0, count: 0 };
+        }
+
+        accumulator[course].total += Number(grade);
+        accumulator[course].count += 1;
+
+        return accumulator;
+    }, {});
+
+    return Object.entries(groupedCourses).reduce((accumulator, [course, values]) => {
+        accumulator[course] = values.count === 0 ? 0 : values.total / values.count;
+        return accumulator;
+    }, {});
 }

-function getTopPerCourse(students) {
+export function getTopPerCourse(students) {
+    const topStudentsByCourse = students.reduce((accumulator, student) => {
+        const currentTopStudent = accumulator[student.course];

+        if (!currentTopStudent || student.grade > currentTopStudent.grade) {
+            accumulator[student.course] = student;
+        }
+
+        return accumulator;
+    }, {});
+
+    return Object.values(topStudentsByCourse);
 }

-function calculateOverallStatistics(students) {
-    const summary = document.getElementById("summary");
-    summary.innerHTML += `<p>Total Students: ${students.length}</p><br>
-                        <p>Average Grade: </p><br>
-                        <p>Highest Grade: </p><br>
-                        <p>Lowest Grade: </p><br>
-                        <p>Average Attendance: %</p><br>
-                        <p>Unique Courses: </p><br>`;
+export function calculateOverallStatistics(students) {
+    if (students.length === 0) {
+        return {
+            totalStudents: 0,
+            averageGrade: 0,
+            highestGrade: 0,
+            lowestGrade: 0,
+            averageAttendance: 0
+        };
+    }
+
+    const totals = students.reduce((accumulator, { grade, attendance }) => {
+        const numericGrade = Number(grade);
+        const numericAttendance = Number(attendance);
+
+        accumulator.totalStudents += 1;
+        accumulator.gradeTotal += numericGrade;
+        accumulator.attendanceTotal += numericAttendance;
+        accumulator.highestGrade = Math.max(accumulator.highestGrade, numericGrade);
+        accumulator.lowestGrade = Math.min(accumulator.lowestGrade, numericGrade);
+
+        return accumulator;
+    }, {
+        totalStudents: 0,
+        gradeTotal: 0,
+        attendanceTotal: 0,
+        highestGrade: -Infinity,
+        lowestGrade: Infinity
+    });
+
+    return {
+        totalStudents: totals.totalStudents,
+        averageGrade: totals.gradeTotal / totals.totalStudents,
+        highestGrade: totals.highestGrade,
+        lowestGrade: totals.lowestGrade,
+        averageAttendance: totals.attendanceTotal / totals.totalStudents
+    };
 }