Underscore.JS - compose method

Syntax

_.compose(*functions)

compose method create a chained method where each function's return valus is used by other function.

Example

var _ = require('underscore');

var greeting = function(name) { return "Hi " + name + "!" };
var toUpperCase = function(value) { return value.toUpperCase()};

var welcome = _.compose(greeting, toUpperCase);
console.log(welcome('Sam'));

Save the above program in tester.js. Run the following command to execute this program.

Command

\>node tester.js

Output

Hi SAM!