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Lodash _.mapKeys


The lodash _.mapKeys method is a powerful function that transforms an object by creating a new object with the same values but different keys. This method is part of the widely-used lodash library, which provides a variety of utility methods for working with data in JavaScript.

The syntax for _.mapKeys is as follows:

_.mapKeys(object, [iteratee=_.identity])

The method takes two arguments: the object to be transformed and an optional iteratee function. The iteratee function is used to generate new keys for the transformed object. If no iteratee function is provided, the _.identity function is used by default, which simply returns the value passed to it.

Here is an example of how _.mapKeys can be used to transform an object:

const originalObject = { 'key1': 1, 'key2': 2, 'key3': 3 };
const newObject = _.mapKeys(originalObject, (value, key) => `new-${key}`);
// Output: { 'new-key1': 1, 'new-key2': 2, 'new-key3': 3 }

In this example, the original object has three properties with keys 'key1', 'key2', and 'key3'. The _.mapKeys method is used to generate a new object with the same values, but with new keys generated using an iteratee function that prepends the string 'new-' to the original keys.

Overall, the _.mapKeys method is a useful tool for transforming objects in JavaScript, allowing developers to quickly and easily create new objects with modified keys based on existing values.