sami-ul-haq/array-object-task

array-object-task

Array-Object Task

Level 01 - Basic [Access Methods Questions]

How will you access the third position of the following array?

Question: let arr = [5, 10, 15]
Answer: console.log(arr[2]);

How will you access the second element, degree from the following object?

Question:   let obj = { name: "Maimoona", degree: "MBBS" }
Answer:  console.log(obj.degree)

How will you access all elements of the following array using loops?

Question:   let arr = [1, 2, 3, 4, 5, 6, 7]
Answer:  arr.forEach( element => console.log(element));

How will you access all elements of the following object using loops?

Question:   let obj = { name: "Maimoona", degree: "MBBS", age: 25 }
Answer:  for (const i in obj) {
              console.log(obj[i]); }

Level 02 - Intermediate

[Students' Names and Hobbies Data]

Question:Print the following to the console:
let students = [{name: "Amna",hobbies: ["eating", "cooking"]},
    {name: "Daniyal",hobbies: ["arts", "shopping"]},
    {name: "Fahad",hobbies: ["coding", "cooking"]},
    {name: "Hajra",hobbies: ["sleep", "reading"]}];

Answer:
    students.forEach(function(student){
        console.log(`Hobies Of ${student.name}`);

    student.hobbies.forEach(function(hobby , index){
        console.log(`${index+1}. ${hobby}`)
        });
    })

[Extensive Students' Data]

Array Can Be Found At Here

Q1. Print each student in this format:
    Name: Amna
    Gender: Female
    City: Karachi
    Score: 56 marks
Ans.
    students.forEach(function(student){
      console.log(`Name: ${student.name}`);
      console.log(`Gender: ${student.gender}`);
      console.log(`City: ${student.address.city}`);
      console.log(`Score: ${student.admissionTestScore}`);
    })
    
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Q2. Print names of female students only.
Ans.   
    students.forEach(function(student){
      if(student.gender === "f"){
         console.log(student.name);
      } })
  
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Q3. Print names of male students only.
Ans.
    students.forEach(function(student){
      if(student.gender === "m"){
         console.log(student.name);
      } })
      
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Q4. Print names of students who have passed the admission test. Passing marks are 50.
Ans.
    students.forEach(function(student){
    if(student.admissionTestScore >= 50){
        console.log(student.name);
    }  })

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Q5. Print names of eligible students only (students who have internet and live in Karachi are eligible)
Ans.
    students.forEach(function(student){
    if(student.hasInternet && student.address.city === "Karachi"){
        console.log(student.name);
    }  })

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Q6. Print address of each student in this format:
      Amna's address:
      Gulistan-e-Johar in Karachi, Pakistan
Ans.
    students.forEach(function(student){
      console.log(`${student.name}'s Address \n${student.address.ilaqa} in ${student.address.city}, ${student.address.country}`);     
    })

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Q7. Print names and phone number of students who have Ufone.
Ans.
    students.forEach(function(student){
    if(student.phoneNo.includes('0331')){
        console.log(`Names: ${student.name} \nPhone No: ${student.phoneNo}`);
    } })
    
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Q8. Students who have a job or a class are placed in Group B. Print the names of students in Group A, and in Group B, in the below format:
      Group A:  name1, name2
      Group B:  name3, name4, name5
Ans.
    let groupA = [], groupB = [];
    students.forEach(function (student) {
      if(student.hasJob || student.hasSchoolBefore){
        groupB.push(student.name);}
      else{
        groupA.push(student.name);}
    });
    console.log("Group A: ", groupA.join());
    console.log("Group B: ", groupB.join());

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Q9. Print age of each student in the below format:
      Amna's age is 29 years
Ans.
    students.forEach(function(student){
      let dob = 2020 - student.dob.getFullYear();
      console.log(`${student.name}'s age is ${dob}`);
    })

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Q10. Print the name of the oldest student
Ans.
    let ages = [];
    students.forEach(function (student) {
      let age = 2020 - student.dob.getFullYear();
      ages.push(age);    });

    let maxAge = Math.max(...ages);
    students.forEach(function (student) {
      if (2020 - student.dob.getFullYear() == maxAge) 
      console.log(student.name);   });

[Videos Data Task]

Array Can Be Found At Here

Ans: File Is Attachehd
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Level 03 - Advance

The Recipe Card [Question ](https://github.com/techkaro-circle/JS-Arrays-and-Objects-Tasks/wiki/Recipe-Card)
Solution:
        let recipe = { title: "Mole", servings: 2, ingredients: ["cinnamon", "cumin", "cocoa"] };

        console.log(recipe.title);
        console.log("Serves: " + recipe.servings);
        console.log("Ingredients:  ");
        
        recipe.ingredients.forEach(function (i) {
          console.log(i);
          });

The Reading List Question

Solution:
        let books = [
            {title: "The Hobbit", author: "J.R.R. Tolkien", alreadyRead: true},
            {title: "The Lord of the Rings", author: "J.R.R. Tolkien", alreadyRead: false},
            {title: "The Silmarillion", author: "J.R.R. Tolkien", alreadyRead: false,},
        ];

        books.forEach(function (book) {
            console.log(`${book.title} by ${book.author}`);  
        });

        books.forEach(function (book) {
            if (book.alreadyRead) {
                console.log(`You already read ${book.title} by ${book.author}`);  } 
            else{
                console.log(`You still need to read ${book.title} by ${book.author}`);  }
        });