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Update the attribute value of an object using the map function in ES6

I am trying to code this in ES6. Below is what I am trying to achieve. Let’s say I have an array of objects called schools.

let schools = [
    {name: 'YorkTown', country: 'Spain'},
    {name: 'Stanford', country: 'USA'},
    {name: 'Gymnasium Achern', country: 'Germany'}
];

Now, I want to write a function called editSchoolName which will take 3 parameters, schools (which is the array I have defined above), oldName and name.

I will pass the name of the school in the parameter oldName and that name should be updated with the value in the parameter name.

I don’t want to change the state of the variable schools so I am using a map function which will return a new array with the changes.

The editSchoolName function will be called like this –

var updatedSchools = editSchoolName(schools, "YorkTown", "New Gen");

Here, the name YorkTown should be replaced with the name New Gen. So the expected value of the array updatedSchools should be –

let updatedSchools = [
    {name: 'New Gen', country: 'Spain'},
    {name: 'Stanford', country: 'USA'},
    {name: 'Gymnasium Achern', country: 'Germany'}
];

This is how my editSchoolName function looks like –

const editSchoolName = (schools, oldName, name) =>
    schools.map(item => {
        if (item.name === oldName) {
          /* This is the part where I need the logic */
        } else {
          return item;
        }
    });

Need help in making the change in the editSchoolName function to achieve the above mentioned desired result.

Answer

try this, ES6 Object.assign() to create copy of array element and update new object.

let schools = [{
        name: 'YorkTown',
        country: 'Spain'
    },
    {
        name: 'Stanford',
        country: 'USA'
    },
    {
        name: 'Gymnasium Achern',
        country: 'Germany'
    }
];

const editSchoolName = (schools, oldName, name) => {
    return schools.map(item => {
        var temp = Object.assign({}, item);
        if (temp.name === oldName) {
            temp.name = name;
        }
        return temp;
    });
}

var updatedSchools = editSchoolName(schools, "YorkTown", "New Gen");
console.log(updatedSchools);
console.log(schools);