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Lodash _.invert

Overview

The lodash _.invert method is a powerful utility function that allows you to create a new object with inverted keys and values from the original object. This method is particularly useful when you need to reverse the order of an object's keys and values or determine unique values for a set of data.

Syntax:

_.invert(object)

The _.invert method takes an object parameter and returns a new object where the object's keys become the values and the object's values become the keys. If the original object has duplicate values, the method will override these values, and only one value will be returned in the inverted object. If you want to preserve all values, you can pass the _.invertBy method as the second argument.

Example usage:

const originalObject = { a: 1, b: 2, c: 2 };
const invertedObject = _.invert(originalObject);

console.log(invertedObject);
// Output: { '1': 'a', '2': 'c' }

In this example, the _.invert method takes an object with keys a, b, c and values 1, 2, 2, respectively, and returns a new object where keys are 1 and 2 and their values are a and c, respectively.

When using _.invert, it is important to consider the type of key-value pairs in your original object. For example, if your original object has non-unique values, the resulting inverted object will conflict with certain key-value pairs. Additionally, if your original object contains values that are not strings or numbers, you will need to convert them to acceptable values before using _.invert.

Overall, the _.invert method can be a powerful tool for working with objects in JavaScript. With its simple syntax and ability to quickly invert keys and values, it is a useful utility function to keep in your development toolkit.