how to use the sum function from lodash in javascript

In order to use the sum function from lodash in JavaScript, you will first need to install the lodash library. You can do this using npm, by running the following command in your terminal:

index.tsx
npm install lodash
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Once you have installed lodash, you can import the sum function into your JavaScript code like this:

index.tsx
const _ = require('lodash');
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Then, you can use the sum function to find the sum of an array of numbers, like this:

index.tsx
const numbers = [1, 2, 3, 4, 5];
const sum = _.sum(numbers); // Returns 15
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Alternatively, you can use the sumBy function to find the sum of a property in an array of objects. For example, if you have an array of objects representing sales transactions, and you want to find the total revenue generated, you could do something like this:

index.tsx
const transactions = [
  { id: 1, amount: 100 },
  { id: 2, amount: 200 },
  { id: 3, amount: 300 }
];

const totalRevenue = _.sumBy(transactions, 'amount'); // Returns 600
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In the above example, sumBy takes two arguments: the array of objects, and the property to sum by ('amount' in this case).