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Andrew Mullan
Andrew Mullan

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Apr 30, 2021

React Native through the lens of a React Web App developer

I have recently started converting a few of my React web apps to React Native and I’ve really enjoyed how straight forward the process has been. Most of the learning has just been finding out which HTML tags correspond to which React Native components. Any logic of state or loading…

React

4 min read

React Native through the lens of a React Web App developer
React Native through the lens of a React Web App developer

Feb 2, 2021

Fibo and Memo

A common theme in dynamic programming algorithm questions on Leetcode or in job interviews, is that the underlying problem is some twist on or manipulation of the numbers of the Fibonacci sequence. The Fibonacci sequence is a series of numbers where the next number is the sum of the previous…

Algorithms

3 min read

Fibo and Memo
Fibo and Memo

Dec 1, 2020

What is a Promise?

Have you ever tried to set the results of a fetch to a variable, but once you run your code the variable does not contain any data you hoped to get back? If you log your variable to the console or check it in a debugger, you may notice your…

Java Script

4 min read

What is a Promise?
What is a Promise?

Nov 23, 2020

Hiding keys and secrets in Ruby on Rails

When creating a Ruby on Rails backend, you may want to utilize an external API or set up JWT. In the case of an external API you will likely need an API key when making requests to the server. If this key is exposed to the public and someone were…

Rails

3 min read

Hiding keys and secrets in Ruby on Rails
Hiding keys and secrets in Ruby on Rails

Nov 9, 2020

Converting a Rails database from SQLite to PostgreSQL

You may have set up a Rails project using the default values, but now want to deploy it to a hosting site such as Heroku. If you follow the instructions on Heroku to push your project to their site you may receive the following error: …

Rails

6 min read

Converting a Rails database from SQLite to PostgreSQL
Converting a Rails database from SQLite to PostgreSQL

Published in The Startup

·Oct 13, 2020

Selecting Elements in the DOM With Javascript

As your webpage grows in size, it may become more difficult to grab the elements you’d like to edit. Javascript gives you multiple powerful tools to select the items you’re looking for, but it can be confusing on which one to use. …

Java Script

5 min read

Selecting Elements in the DOM With JavaScript
Selecting Elements in the DOM With JavaScript

Oct 5, 2020

Loading Excel Data Into an ActiveRecord Database

Do you have a large excel file that you would like to get into your ruby program or rails database? There’s a gem for that! Either install the csv gem and require it, or add it to your Gemfile. $ gem install csv #in your .rb file require ‘csv’ or…

Ruby

3 min read

Loading Excel Data Into an ActiveRecord Database
Loading Excel Data Into an ActiveRecord Database
Andrew Mullan

Andrew Mullan

Current Web Development student at https://flatironschool.com/

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