how to use the reduce function from the lodash library in typescript

Here's an example use of the reduce function from the Lodash library in TypeScript:

index.ts
import { reduce } from 'lodash';

const numbers = [1, 2, 3, 4, 5];
const sum = reduce(numbers, (accumulator, currentValue) => accumulator + currentValue, 0);

console.log(sum); // Outputs: 15
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In this example, we first import the reduce function from the Lodash library. We then define an array of numbers that we want to sum. To sum the array, we call the reduce function on the numbers array. The reduce function takes three arguments: the array to operate on (numbers), a callback function to perform the reduction ((accumulator, currentValue) => accumulator + currentValue), and an initial value for the accumulator (0).

The callback function takes two arguments, the accumulator and the currentValue. On each iteration of the reduce function, the callback function takes the accumulator value and adds the currentValue to it. The result of the callback function becomes the new value of the accumulator. Once the reduce function has iterated over all values in the numbers array, it returns the final value of the accumulator.

Finally, we output the sum of the numbers array to the console.