Could this simple hour conversion get any faster? Hint: It gets 420 times faster

Riding a motorcycle
Riding a motorcycle
Photo by Harley-Davidson on Unsplash.

In the middle of a quiet day, a friend of mine reached out to me to ask for an idea: He said, “If I give you a string of an hour in a 12-hour format, like 7PM, how would you get the integer version of it for the 24-hour format, like 19?” After answering this question, some ideas about how fast this could get started to flow and I decided to go down that rabbit hole hoping to learn a thing or two.

Spoiler alert: I learned a bunch of stuff, along with how wrong some of my expectations were.

Problem Statement


The conversation has shifted away from PHP to JavaScript and Python. Does PHP still matter?

Two elephants
Two elephants
Photo by Mylon Ollila on Unsplash.

A Brief History of PHP

PHP was developed by Rasmus Lerdorf in 1994. Lerdorf developed a bunch of scripts to track the visits to his online resume and named them “Personal Home Page Tools,” which then evolved into being called “PHP Tools.” He kept adding more tools to this suite and at some point pulled off a rewrite of the tools, including added functionality for database interactions and more — thus turning it into a more complete framework.

From that point on, the tools evolved into more complex primitives and kept gaining more users after it was open-sourced in 1995. …


A practical guide for setting up Pi-hole for a privacy-focused home network.

A forest with some sunlight in the back
A forest with some sunlight in the back
Photo by Gerold Hinzen on Unsplash

I need to start this article with some simple disclaimers: I love Raspberry Pi, I love Docker, I don’t love networking that much (spoiler alert: I suck at it).

  • I love Raspberry Pi because it is a tiny, fully functioning computer that gives me goosebumps. It is one of those things that makes you feel like Mr. Robot. It is relatively cheap, it is accessible, and there are tons of guides online to do pretty much anything you can imagine.
  • I love Docker because it is a simple…


I should have a base test suite that can run without an internet connection, and it should be super fast. Both of them, at the same time.

Photo by Veri Ivanova on Unsplash

Laravel has been my go-to framework for all of my side projects thanks to its ease of use, but while integrating Cashier into Nana recently, I have seen that there is no easy way of testing the subscription creation flows when using Cashier. The docs suggest that you do real calls against the Stripe’s test APIs:

When testing an application that uses Cashier, you may mock the actual HTTP requests to the Stripe API; however, this requires you to partially re-implement Cashier’s own behavior. Therefore, we recommend allowing your tests to hit the actual Stripe API.

This might be good…


A comparative analysis of two great languages with regards to their features, communities and industry position.

Photo by Jerry Zhang on Unsplash

The comparison of Python and R has been a hot topic in the industry circles for years. R has been around for more than two decades, specialized for statistical computing and graphics while Python is a general-purpose programming language that has many uses along with data science and statistics. Many of the beginners have the same question in mind: which of these two great languages should I pick for getting started with data science?

Python

Released in 1991, Python has built itself a strong reputation for being an incredibly simple language to get started with that allows you to do almost…


Photo by Marc Thunis on Unsplash

There is always a need for fast prototyping when it comes to data science solutions. Be it a sophisticated face recognition algorithm or a simple regression model, having a model that allows you to easily test and validate ideas is incredibly valuable.

Many data science problems out there require specially crafted solutions due to the nature of the problem. This means that the data scientists working on these problems will eventually need to improvise on the issue, which means not having to wait to calculate some additional feature column on the dataset every time you execute your script becomes a…


No servers to manage, no maintenance, deploy and forget. I think I found a valid use-case for Lambda.

This is how Devo looks with the dark mode.

Since its launch towards the end of 2014, Lambda has created a lot of hype, and more importantly, brought the term “serverless” into the industry. At its core, “serverless” does not mean that there are no servers or anything; there are servers, but you are not the one managing those servers. You don’t know where your code is running, you don’t SSH into a server, you don’t do anything that you’d do with regular servers or VMs. …


Alright, we get it, “cloud” is the future and we need to use containers with all the fancy tools it offers. We are going to containerize our app, use container orchestration tools for deployments, and we have to install Docker.

Photo by Jay Mantri on Unsplash

What is a container?

Remember the good old times where you used to SSH into the production server, go to the project directory, and run git pull to deploy your code? Before you deploy anything, in the very beginning of the life of your server, you’d install all the global dependencies for your app, curl most probably, then git, maybe the interpreter for the…


I thought I had a smart solution to an ancient problem, which turned out to be a stupid engineering quest.

Photo by isabel garger on Unsplash

I used to live in a not-so-nice neighborhood of Istanbul since I was born, and there would be burglary incidents every once in a while. Also, we were living in a family building where all 3 apartments of the building were occupied by us, my uncles, and their families. The thing is, our building had this old rusty external door which had a broken lock; therefore, we were not able to lock the door and we were only locking our…


I’d expect a senior engineer to be a technically capable individual who thinks and understands human psychology, has good self-motivation skills that would ignite the team motivation as well and is dependable. I wanted to pour some thoughts, think out loud about seniority and to reflect on some discussions I’ve had with some friends recently.

Photo by Patrick Fore on Unsplash

What Doesn’t Make a Senior Engineer

There may be multiple things to mention as pitfalls to understand if the subject individual is senior or not in a broad sense, but there is a common theme I see companies and teams fall into, and some of the characteristics of those mistakes seem…

Burak Karakan

Software Engineer @HelloFresh

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