how to use the flow function from lodash in javascript

The flow() function from lodash is a higher-order function that allows you to create a chain of functions that are executed in a sequence. It takes one or more functions as arguments and returns a new function that takes an input and gives the output of the last function in the sequence.

Here is an example of how to use the flow() function in JavaScript:

index.tsx
const { flow } = require('lodash');

const add = (a, b) => a + b;
const square = (n) => n * n;
const subtract = (a, b) => a - b;

const computation = flow(
   add,
   square,
   subtract
);

const result = computation(2, 3);
console.log(result); // Output: 4
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In this code, we first import the flow function from lodash using destructuring. Then we define three functions add, square, and subtract that take two, one, and two arguments respectively.

We use the flow function to create a computation function that is a sequence of these three functions. When computation is called with 2 and 3 as arguments, it first adds them to get 5, then squares the result to get 25, and finally subtracts 25 from 5 to get 4 as the output.

This is an example of how functional programming and function composition can simplify complex computations by breaking them down into smaller, reusable functions.