Lodash _.flow() Method

Lodash is a JavaScript library that works on the top of underscore.js. Lodash helps in working with arrays, strings, objects, numbers, etc.

The _.flow() method is used to generate a new composite function that returns the result of invoking the provided functions with the this binding of the function generated. Each of the successive invocations is provided the return value of the previous.

Syntax:

_.flow( funcs )

Parameters: This method accepts a single parameter as mentioned above and described below:

• funcs: This parameter holds the functions that are to be invoked. It is an optional parameter.

Return Value: This method returns the new composite function.

Example 1:

Javascript

// Requiring the lodash library
const _ = require("lodash");

// Function to calculate the
// Cube of a number
function cube(number) {
  return number * number * number;
}

// Using the _.flow() method
var multiplycube = _.flow([_.multiply, cube]);

// Return the output
console.log(multiplycube(2, 3));

Output:

216

Example 2:  

Javascript

// Requiring the lodash library
const _ = require("lodash");

// Function to calculate the
// double value of a number
function doubled(number) {
  return number * 2;
}

// Using the _.flow() method
var adddoubled = _.flow([_.add, doubled]);

// Return the output
console.log(adddoubled(6, 8));

Output:

28

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