JavaScript: Replace the names of multiple object keys with the values provided

JavaScript fundamental (ES6 Syntax): Exercise-14 with Solution

Replace Multiple Object Keys

Write a JavaScript program to replace multiple object keys' names with the values provided.

• Use Object.keys() in combination with Array.prototype.reduce() and the spread operator (...) to get the object's keys and rename them according to keysMap.

Sample Solution:

JavaScript Code:

//#Source https://bit.ly/2neWfJ2 
// Define a function called `rename_keys` that renames keys of an object based on a provided mapping.
const rename_keys = (keysMap, obj) =>
  Object.keys(obj).reduce(
    (acc, key) => ({
      ...acc,
      ...{ [keysMap[key] || key]: obj[key] } // Rename keys based on the keysMap, otherwise keep the original key
    }),
    {}
  );

// Original object
const obj = { name: 'Bobo', job: 'Programmer', shoeSize: 100 };
console.log("Original Object");
console.log(obj);
console.log("-------------------------------------");

// Renaming keys according to the provided mapping
result = rename_keys({ name: 'firstName', job: 'Actor' }, obj);

// Displaying the modified object
console.log("New Object");
console.log(result);

Output:

"Original Object"
[object Object] {
  job: "Programmer",
  name: "Bobo",
  shoeSize: 100
}
"-------------------------------------"
"New Object"
[object Object] {
  Actor: "Programmer",
  firstName: "Bobo",
  shoeSize: 100
}

Flowchart:

Live Demo:

See the Pen javascript-fundamental-exercise-14 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript program that renames several keys in an object based on a mapping of old keys to new keys.
• Write a JavaScript function that iterates over an object and replaces its keys according to a provided replacement object.
• Write a JavaScript program that deep clones an object and renames specific keys without affecting the original object.

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