How to remove an item from an array of objects for a function?

keoe 0
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1.Given an array of submission objects, when I supply a date, an array of student names, and an array of submission objects to the findUnsubmitted function, I am returned an array of names of students that haven't completed any quiz on that date.

  1. Given the the findUnsubmitted feature doesn't find any student names, I am returned an empty array.

When I console.log my findUnsubmitted function, I am just returned: [ 'Kevin', 'Nivek', 'John' ] ... when in this case, I should only be returned Kevin and John in the array...

const submissions = [
    {
        quizName: "Quiz 1",
        quizModule: "Math",
        quizScore: 100,
        studentId: 001,
        studentName: "Kevin",
        submissionDate: "March 24, 2022"
    },
    {
        quizName: "Essay",
        quizModule: "English",
        quizScore: 0,
        studentId: 023,
        studentName: "Nivek",
        submissionDate: "April 1, 2022"
    },
    {
        quizName: "Quiz 2",
        quizModule: "Science",
        quizScore: 71.59485,
        studentId:023,
        studentName: "John",
        submissionDate: "May 24, 2022"
    }

]

const filterByDate = (particularDate, submission) => {
    return submission.filter((sub) => sub.submissionDate === particularDate)
}

const findUnsubmitted = (particularDate, names, submission) => {
    const date = filterByDate(particularDate, submission);
    const unsubmitted = names;
    for(let i = names.length - 1; i >=0; i--) {
        const student = date[i];
        if(student == names.studentName){
            submissions.splice(i, 1);
        }
        return unsubmitted;
        }
}

console.log(findUnsubmitted('April 1, 2022', ['Kevin', 'Nivek', 'John'], submissions));
array-splice arrayobject arraylist arrays javascript
1 Answers

If you just want to return an array of names of students that haven't completed any quizzes on that date. Don't make it complicated

In function: findUnsubmitted don't need using names variable.

Change code in function filterByDate like:

const filterByDate = (particularDate, submission) => {
     return submission.filter((sub) => sub.submissionDate !== particularDate)
}

and function findUnsubmitted:

const findUnsubmitted = (particularDate, submission) => {
      const date = filterByDate(particularDate, submission);
      if (!date) return [];
      return date.map(item => item.studentName);
}

Hope that it helps you.

Hungnn0
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