Question 262790 in Javascript Question posted in
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Javascript – update the value with iterate on Array list

I would like to update the stautent status in array list. I would like update status with loop thought the arraylist.
How can I update the status in array list? Now I update all value when the 1st value is updated.

Now I have a list

[
{
            "studentId": 3,
            "result": 100,
            "resultStatus": false,
},
{
            "studentId": 2,
            "result": 20,
            "resultStatus": false,
},
{
            "studentId": 2,
            "result": 51,
            "resultStatus": false,
}
]


    
    const checkstatus = (result, passScore) => {
      if(result >= passScore){
        return true; //pass
      } else{
        return false; //fail
      } 
    }

    this.list =  this.list.map(x => ({
      ...x,
      resultStatus: checkstatus(x.result, 50 )
    }))

Expect result is

[
{
            "studentId": 3,
            "result": 100,
            "resultStatus": true,
},
{
            "studentId": 2,
            "result": 20,
            "resultStatus": false,
},
{
            "studentId": 2,
            "result": 51,
            "resultStatus": true,
}
]
Tags:

2

Answers


  1. 0

    You can try the following way:

    const students = [
    {
        "studentId": 3,
        "result": 100,
        "resultStatus": false,
    },
    {
        "studentId": 2,
        "result": 20,
        "resultStatus": false,
    },
    {
        "studentId": 2,
        "result": 51,
        "resultStatus": false,
    }
];

const passScore = 50;

//use map() to create a new array with updated resultStatus values for each student
const updatedStudents = students.map(student => ({
    ...student,
    //inline arrow function to check if the student's result is greater than or equal to the passScore
    resultStatus: ((result, passScore) => result >= passScore)(student.result, passScore)
}));

console.log(updatedStudents);
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  2. 0

    I think you doesn’t need any function to calculate result status

    const students = [
    {
        "studentId": 3,
        "result": 100,
        "resultStatus": false,
    },
    {
        "studentId": 2,
        "result": 20,
        "resultStatus": false,
    },
    {
        "studentId": 2,
        "result": 51,
        "resultStatus": false,
    }
];

const passScore = 50;


const passed =  students.map(student=> ({...student,resultStatus:student.result >= passScore}))

console.log(passed);
    .as-console-wrapper { max-height: 100% !important; }
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