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');Â Â Â function cb (x)Â {Â Â Â Â Â return x * x * x;Â }; function tp (x)Â {Â Â Â Â Â return 3 * x;Â }; function db (x)Â {Â Â Â Â Â return 2 * x;Â }; var func = _.pipeline(cb, tp, db); Â Â console.log(func(5)); |
Output:
750
Example 2: Passing functions as an array.
Javascript
// Defining lodash contrib variable var _ = require('lodash-contrib');Â Â Â function cb (x)Â {Â Â Â Â Â return x * x * x;Â }; function tp (x)Â {Â Â Â Â Â return 3 * x;Â }; function db (x)Â {Â Â Â Â Â return 2 * x;Â }; Â Â var func = _.pipeline([tp, cb, db]); Â Â console.log(func(5)); |
Output:
6750
