Question 108468 in Javascript Question posted in
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Javascript – How to iterate through object value

const schoolObj = {
  class10: { studentName: John, result: pass },
  class11: { studentName: Alis, result: pass },
  class12: { studentName: Nick, result: fail },
};

How to create list of studentName if result is pass. class10,11,12 all are dynamic values.I am stuck at how to access this dynamic value in iteration.

I want result like array of student = [John, Alis]

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2

Answers


  1. 0

    Filter the object values so that you only have the students that have passed left. Then map the student objects so that you get an array with their names.

    const schoolArr = {
  class10: { studentName: 'John', result: 'pass' },
  class11: { studentName: 'Alis', result: 'pass' },
  class12: { studentName: 'Nick', result: 'fail' }
};

console.log(
  Object.values(schoolArr)
    .filter(({ result }) => result === 'pass')
    .map(({ studentName }) => studentName)
)
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  2. 0 
    const schoolArr = {
  class10: { studentName: 'John', result: 'pass' },
  class11: { studentName: 'Alis', result: 'pass' },
  class12: { studentName: 'Nick', result: 'fail' }
};

const passStudents = Object.values(schoolArr).reduce((acc, { studentName, result }) => {
  if (result === 'pass') {
    acc.push(studentName);
  }
  return acc;
}, []);

console.log(passStudents);
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