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Lodash _.mean

Overview

Introduction:

The lodash library is a popular JavaScript utility library that provides a set of functions for simplifying programming tasks. One of the methods available in lodash is the _.mean method, which computes the mean (average) value of an array of numbers.

Syntax:

The _.mean method is written as follows:

_.mean(array)

Parameters:

The _.mean method takes one parameter, which is an array of numbers. The array can be of any length, and the numbers can be positive, negative, or zero.

Return Value:

The _.mean method returns a number that represents the mean value of the elements in the input array. If the input array is empty or contains non-numeric values, the method returns NaN (Not-A-Number).

Usage:

To use the _.mean method, first, you need to install lodash in your project. You can install lodash using the following command:

npm install lodash

Once you have installed lodash, you can import it into your project as follows:

const _ = require('lodash');

After importing lodash, you can use the _.mean method to compute the mean value of an array of numbers. For example:

const numbers = [2, 4, 6, 8];
const mean = _.mean(numbers); // returns 5

In this example, the _.mean method is used to compute the mean value of the numbers array, which is 5.

Conclusion:

The _.mean method is a useful utility function provided by the lodash library for computing the mean value of an array of numbers. It is easy to use and returns accurate results for any input array that contains only numeric values. It can be used in various programming tasks that require the computation of the mean value of data sets.