Adding string attributes slightly easier

:  ~ 2 min read

Say we have a composed string that looks like this:

let date = "22 July, 2017"
let value = "€ 148"
let quantity = 5
let string = "\(quantity) of your items, in value of \(value), have been delivered on \(date)."
// 5 of your items, in value of € 148, have been delivered on 22 July, 2017.

It would be nice to emphasise the […]

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Combining protocols

:  ~ 2 min read

Let's say we have a controller that can fetch some data. What would this imply? A loading spinner, the fetching of the data and the update of the UI. We can create a protocol for this, maybe Fetchable:

protocol Fetchable {
  func showSpinner()
  func fetchData()
  func updateUI()
class Controller: UIViewController, Fetchable {
  // showSpinner,  […]

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Queueing up async jobs

:  ~ 2 min read

I recently had this problem: at the start of the app there's a call to fetch some reference data, on which other calls depend, but it shouldn't hinder the app launch itself, nor anything else that doesn't depend on it. So, after several approaches, I decided to use dispatch_groups.

First, a struct to abstract a dispatch_queue and a dispatch […]

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[NJS] Creating a new post

:  ~ 2 min read

Last post in the series is about creating a new post. This wasn't really needed, since the whole point of having my blog in Dropbox was to use any markdown editor I desire, save the file, run the sync command, and have it live, but for the sake of learning, I went ahead and added this feature too.

First, the routes:

router.get("/create/"  […]

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[NJS] Dropbox syncing

:  ~ 7 min read

For Dropbox handling I chose a pretty small library, node-dropbox. To use it, I went in Dropbox's developer dashboard and created an access token (instead of using secrets and keys) and saved that in my .env. Then onto the helper:

const dropbox = require('node-dropbox').api(process.env.ACCESS_TOKEN)

function Dropbox() {}

Dropbox.getFolder  […]

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[NJS] Database handling #3

:  ~ 2 min read

Last time we created a basic database handling functionality, but it was clear we can improve it: posts aren't the only ones that need fetching, and requiring the dbconfig file everywhere (and configuring the object) will become cumbersome. So, a first step would be to create specialized DbConfig objects: = function(page) {
  const  config  […]

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[NJS] Database handling #2

:  ~ 5 min read

Last time I was talking about the DbConfig model and the fetchPosts function, so let's dive in. First, a few examples of using the config:

const Db = require('../lib/db')
const DbConfig = require('../models/dbconfig')

// Fetching one post
const config = new DbConfig()
config.fields      = ['link']
config.fieldValues = [req.baseUrl.substring(1)]  […]

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[NJS] Database handling #1

:  ~ 4 min read

With Sinatra, I was using DataMapper as ORM (Object Relational Mapper) for Postgres, and I got a bit spoiled, because it makes things really easy. You first have to define your data mapping:

class Post
  include DataMapper::Resource
  # Set the number of characters for these types of fields, if the DB supports it

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[NJS] Project structure and layout tips

:  ~ 3 min read

In the previous posts I mentioned file locations, but I haven't been explicit on what my structure is, so let's go through it:

- assets
    |___ javascripts (3rd party js)
    |___ stylesheets
    |___ images
    |___ files (random files I want to serve, like my resume)
- lib (let's call them helpers)
    |___ tasks (anything I want to run on Heroku)
    |_ db.js  […]

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[NJS] Layouts

:  ~ 2 min read

Express 2.0 apparently had layouts and partials included, but they were removed in 3.0. Luckily, ejs-mate has us covered.

Let's quickly cover partials, because it feels a bit easier. First, the partial, inside an example.ejs file, located in the same views folder where all your views are kept (preferably inside a nested partials folder):

<p>I […]

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