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Ricardo Sanchez

Ricardo Sanchez

Seattle

An introduction to Liskov substitution principle (LSP)

This post is about the Liskov substitution principle (LSP). This is also the third of my posts about SOLID principles, following the posts I wrote about DI and ISP in the past few weeks. What is Liskov substitution principle (LSP)? This principle is based on Barbara Liskov’s definition of

An introduction to Interface Segregation Principle (ISP)

Last week I wrote a post about Dependency Injection (DI) with some basic examples in C#. Today I would like to write and offer a simple example of what is known as Interface Segregation Principle (ISP) which can happen if you are not careful when using and implementing interfaces in

An introduction to Dependency Injection (DI) and Inversion of Control (IoC)

There is so much confusion and arguing about what dependency injection is and whether is the same as inversion of control or just one form of it. If you are new to these terms it can be very confusing to say the least. I’ll try to describe what these

Building a Todo web app using PHP, Laravel and Bootstrap

I want to learn more about web frameworks that I am not too familiar with. My plan is to write simple web and mobile apps using different frameworks and technology stacks that I don’t have much experience with. While this is not going to make me an expert on

Install MongoDB service on Windows 8

MongoDB (from “humongous”) is an open-source document database, and the leading NoSQL database. Written in C++. MongoDB is great for modeling many of the entities that back most modern web-apps, either consumer or enterprise: * Account and user profiles: can store arrays of addresses with ease * CMS: the flexible schema of

Turning 40

Today I am turning 40 years old. What does that mean? that I am old? that I am about to go into mid-life crisis? that I should give up all of my dreams? that I am entering into one of life’s most dangerous ages for men? The truth is

How to add a full page background image to your landing page

I recently decided to update the landing page of one of my projects. I wanted to have a full-page background image and change this background image every time a user landed in this page or refreshed it. Here is what I ended up doing: The <html> tag Since