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'}

Solution 1:

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'
    }
];

consteditSchoolName = (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);

Using destructuring

const schools = [
  {
    name: "YorkTown",
    country: "Spain",
  },
  {
    name: "Stanford",
    country: "USA",
  },
  {
    name: "Gymnasium Achern",
    country: "Germany",
  },
];
consteditSchoolName = (schools, oldName, newName) =>
  schools.map(({ name, ...school }) => ({
    ...school,
    name: oldName === name ? newName : name,
  }));
const updatedSchools = editSchoolName(schools, "YorkTown", "New Gen");
console.log(updatedSchools);

Solution 2:

You need to return the updated object:

consteditSchoolName = (schools, oldName, name) =>
  schools.map(item => {
      if (item.name === oldName) {
        return {...item, name};
      } else {
        return item;
      }
});

Solution 3:

consteditSchoolName = (schools, oldName, newName) =>
    schools.map(({name, ...school }) => ({ ...school, name: oldName === name ? newName : name }));

You could shorten it by using a ternary.

Solution 4:

If you want to edit only the commented part:

consteditSchoolName = (schools, oldName, name) =>
    schools.map(item => {
        if (item.name === oldName) {
          var newItem = Object.assign({},item);
          newItem.name = name;
          return newItem;
        }
        else{
          return item;
        }
    });

Solution 5:

I wonder how come none of the answers give simple solution

consteditSchoolName = (schools, oldName, newName) =>
      schools.map(school => { if (school.name === oldName) school.name = newName;
      return school; 
});