Lodash _.renameKeys() Method

Lodash _.renameKeys() method takes an object and a mapping object and returns a new object where the keys of the given object have been renamed as the corresponding value in the keyMap.

Syntax:

_.renameKeys(obj, mapObj);

Parameters:

• obj: Given object to create a new object.
• mapObj: Given map object to create a new object.

Return Value:

This method returns a generated object.

Note:

This will not work in normal JavaScript because it requires the lodash.js contrib library to be installed. Lodash.js contrib library can be installed using the following command:

npm install lodash-contrib

Example 1: This example shows the use of the Lodash _.renameKeys() method.

javascript

// Defining underscore lodash variable
let _ = require('lodash-contrib');

// Declare and object and rename its key
let obj = _.renameKeys({
    1: "Geeks",
    2: "Computer_Science_Portal"
},
    { 1: "g", 2: "c" });

console.log("Generated Object: ", obj);

Output:

Generated Object: Object {c: "Computer_Science_Portal", g: "Geeks"}

Example 2: This example shows the use of the Lodash _.renameKeys() method.

javascript

// Defining underscore lodash variable
let _ = require('lodash-contrib');

// Declare and object and rename its key
let obj = _.renameKeys(
    {
        1: "Geeks", 2: "Computer_Science_Portal",
        3: "Geeks"
    }, { 1: "g", 2: "c", 3: "g" });

console.log("Generated Object: ", obj);

Output:

Generated Object: Object {c: "Computer_Science_Portal", g: "Geeks"}