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Nested Routers in Express.js

Express makes it easy to nest routes in your routers. But I always had trouble accessing the request object's .params when you had a long URI with multiple parameters and nested routes.

Let's say you're building routes for a website www.music.com. Music is organized into albums with multiple tracks. Users can click to see a track list. Then they can select a single track and see a sub-page about that specific track.

At our application level, we could first have a Router to handle any requests to our albums.

const express = require('express');

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image: node:7.0 #node v7
clone:          # the 'clone' section
  depth: 1      # latest commit only

pipelines:
  default:
    - step:
        script:
          - npm i -g yarn
          - yarn

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root = true

[*]
charset = utf-8
indent_style = tab
indent_size = 4
end_of_line = lf
insert_final_newline = false
trim_trailing_whitespace = true

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function sortArr(arr){
    return arr.sort(function (a, b){
        return a - b;
    });
}

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module.exports = {
	'type': '',
	'project_id': '',
	'private_key_id': '',
	'private_key': '',
	'client_email': '',
	'client_id': '',
	'auth_uri': '',
	'token_uri': '',
	'auth_provider_x509_cert_url': '',

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html, body {
  height:100vh; /* viewport height */
}

/*
The second method is using the vh unit. Surely you already know that to determine the "size"
of an element in CSS we can use units such as pixels, points, percentages or even em. But
maybe you have not heard about the vh and vw units. A vh unit (viewport height) is
equivalent to 1% of the height of the viewport (the total of the screen of the device that
shows our web). 1vh = 1% of the total screen, 100vh = 100%. As you may have guessed, the

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Number.prototype.toRad = function() {
   return this * Math.PI / 180;
}

var lat2 = 42.741;
var lon2 = -71.3161;
var lat1 = 42.806911;
var lon1 = -71.290611;

var R = 6371; // km

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function NMEA2GPS(num, pole){
    var poles = {'N':1,'S':-1,'W':-1,'E':1};
    var s = parseFloat(num).toString();
    var deg = s.substring(0,2);
    var min = s.substring(2);
    return (parseInt(deg) + parseFloat(min)/60) * poles[pole];
}

// NMEA2GPS(07721.2060, 'W') => -77.35347

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// You'll need to include the prototypes.js file before use it.
// To NodeJs: let proto = require('prototypes');
// To Html: <script src="path/prototypes.js"></script>

// Note: ChanceJs plugin could be omited since it's only used to verify the correct working for any case.

let Chance = require('chance'); // Plugin to generate content random 
let chance = new Chance();

let text = chance.paragraph(); // Generating paragraph random