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Solved All Questions :) #1

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41 changes: 40 additions & 1 deletion index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -70,7 +70,10 @@ const students: Student[] = [
Example:
getStudentName(students[0]); // => "Alice"
******************************/

function getStudentName(student: Student): string {
return student.name;
}
console.log(getStudentName(students[0]));

/******************************
* ✅ Q2) Create a `getCourse` function:
Expand All @@ -82,7 +85,12 @@ const students: Student[] = [
Example:
getCourse(students[4], 2); // => "Music"
******************************/
function getCourse(student: Student, courseIndex: number): string {
let courseIndexfind = student.courses[courseIndex];
return courseIndexfind;
}

console.log(getCourse(students[4], 2));

/******************************
* ✅ Q3) Create `addCourseToStudent` function:
Expand All @@ -98,6 +106,12 @@ const students: Student[] = [
addCourseToStudent(students[7], "Physics"); // => { id: 8, name: "Helen", courses: ["History", "Art", "PE", "Physics"] }
******************************/

function addCourseToStudent(student: Student, course: string): Student {
student.courses.push(course);
return student;
}

console.log(addCourseToStudent(students[7], "Physics"));

/******************************
* ✅ Q4) Create `countCourses` function:
Expand All @@ -108,6 +122,12 @@ const students: Student[] = [
countCourses(students[1]); // => 4
******************************/

function countCourses(student: Student): number {
return student.courses.length;
}

console.log(`The Student has ${countCourses(students[4])} courses!`);

/******************************
* ✅ Q5) Create a `removeCourseFromStudent` function:
- Accepts:
Expand All @@ -120,6 +140,16 @@ const students: Student[] = [
removeCourseFromStudent(students[6], "Science"); // => { id: 7, name: "Grace", courses: ["Math", "English", "Music"] }
******************************/

function removeCourseFromStudent(student: Student, course: string): Student {
// student.courses = student.courses.filter((n) => {
// if (n !== course) return student.courses;
// }); another way
student.courses = student.courses.filter((n) => n !== course);

return student;
}

console.log(removeCourseFromStudent(students[6], "Science"));

/******************************
* ✅ Q6) Create a `findStudentById` function:
Expand All @@ -133,4 +163,13 @@ const students: Student[] = [
- findStudentById(students, 29); // => undefined
******************************/

function findStudentById(
students: Student[],
studentId: number
): Student | undefined {
let finedstudet = students.find((student) => student.id === studentId);
return finedstudet;
}

console.log(findStudentById(students, 10));
console.log(findStudentById(students, 29));