Lodash _.pipeline() Method

0 0 1 minute read

The Lodash _.pipeline() method takes a list of functions, either as an array or as arguments, and returns a function that takes some value as its argument and runs it through a pipeline of the original functions given in this function.

Syntax:

_.pipeline( func1, func2,..., funcn );

Parameters: This method accepts a single parameter in the form of n functions and hence operate upon given value.

Return Value: This method returns a function.

Note: To execute the below examples, you have to install the lodash-contrib library by using this command prompt and execute the following command.

npm install lodash-contrib

Below examples illustrate the Lodash _.pipeline() method in JavaScript:

Example 1: Passing functions as arguments.

Javascript

// Defining lodash contrib variable 
var _ = require('lodash-contrib');  
  
function cb (x)  
{  
    return x * x * x;  
}; 
function tp (x)  
{  
    return 3 * x;  
}; 
function db (x)  
{  
    return 2 * x;  
}; 
var func = _.pipeline(cb, tp, db); 
  
console.log(func(5));

Output:

Example 2: Passing functions as an array.

Javascript

// Defining lodash contrib variable 
var _ = require('lodash-contrib');  
  
function cb (x)  
{  
    return x * x * x;  
}; 
function tp (x)  
{  
    return 3 * x;  
}; 
function db (x)  
{  
    return 2 * x;  
}; 
  
var func = _.pipeline([tp, cb, db]); 
  
console.log(func(5));