• ## Mathematical Induction for proving tiling methods Oct 19, 2017 • Reading time: 9 minutes • Mahdi

On my way towards self-taught data science, I’ve stumbled upon the need to be proficient with mathematical proofs, so I picked up the amazing How To Prove It: A Structured Approach by Daniel J. Velleman; and I’ve been fascinated by mathematical proofs since then.

• ## Typoclassopedia: Exercise solutions Sep 27, 2017 • Reading time: 54 minutes • Mahdi

I wanted to get proficient in Haskell so I decided to follow An [Essential] Haskell Reading List. There I stumbled upon Typoclassopedia, while the material is great, I couldn’t find solutions for the exercises to check against, so I decided I would write my own and hopefully the solutions would get fixed in case I have gone wrong by others. So if you think a solution is wrong, let me know in the comments!

• ## DIY Cardboard Kindle Stand (for bed) Sep 24, 2017 • Reading time: 1 minute • Mahdi

I’ve had a Kindle for more than a year now, but I’ve only recently started to read books on it frequently, I used to read paperworks before that, and I still do sometimes prefer paperbooks if available. Anyways, my Kindle has helped me to fall asleep without struggling with all my thoughts, all I have to do is read until I fall asleep, so in a way, it has also been a remedy for my insomnia.

Now to read the Kindle in bed, you would have to hold it using your hands or buy a stand or make one, motivated by The Pursuit of Laziness I set to create mine, but I didn’t use a piece of steel, instead I used a single box of cardboard I had in home to create one in minutes. :D

• ## Difference between Travis CI tests: PR and Push Sep 9, 2017 • Reading time: 1 minute • Mahdi

I just want to leave this here as I often tend to look it up myself and the first time it was not as easy to figure out.

When using Travis CI along with GitHub (or other git integrations), Travis runs two tests: pr and push.

Most of the time you see both tests passing and you do not have to even wonder how they are different, but it has happened to me that one of the tests fails while the other passes and I started to wonder why.

### pr

The pr test is a test run on the result of a merge between the pull-request branch and the main branch. As an example, let’s say your pull-request’s branch is called fix-user-auth and your main branch is master, in this case, pr merges fix-user-auth into master and then runs the tests on the result of the merge.

### push

On the other hand, push is run on the pull-request branch itself, without merging. So in our example above, Travis would checkout to fix-user-auth and run the tests.

### A case of difference

A case in which this difference might be more apparent is when your pull-request is based on a branch other than master, and some changes that your pull-request depends on are missing from master, in this case the push test may pass, but the pr test will fail.

• ## Primitive Living Lessons Learned, Episode 0 Sep 7, 2017 • Reading time: 11 minutes • Mahdi

So I just went on my first primitive living practice trip in the woods, alone, with only a pocket knife.

I decided I’m going to share the lessons I’ve learned in each trip as they are certainly going to be useful if you want to practice primitive living, I would find these useful if I could find them anywhere. I spend a lot of time reading and watching primitive living guides and experience reports, but they are never exhaustive, and this series is not meant to be exhaustive either.

• ## Don't chase: Become the good one Feb 4, 2017 • Reading time: 3 minutes • Mahdi

When it comes to relationships, most (unsuccessful) people are chasing the good ones. They spend time trying to find their dream partner, the perfect match, but hey, do you qualify as the dream partner of your dream partner? You fantasize about your dream partner, but have you ever thought what kind of partner does he/she dream of?

I want an angel with…

• ## Stop High-Frequency Fuck-ups Dec 26, 2016 • Reading time: 5 minutes • Mahdi

High-Frequency Fuck-Ups:

The cyclic process of “pushing yourself hard for a week, getting something done, and then feeling depressed and fucked up for the next week”

Visual demonstration of High-Frequency Fuck-ups

• ## Immortals go extinct Nov 15, 2016 • Reading time: 3 minutes • Mahdi

We are all going to die, we all know that well.

Now I want to take you to a world of immortals where humans don’t die, they live and live and live and… you know, live. From now on, pretend I’m a human on this world of immortals, I’m immortal bitches.

There is no campfire because they don’t need it

• ## Open-source: The Good, The Bad and The Ugly Oct 13, 2015 • Reading time: 5 minutes • Mahdi

I have been doing Open-source for a while, I don’t call myself an “expert” or something like that, but I’d like to share my opinion and experience on contributing to, and maintaining open-source code.

• ## Autocomplete using Tries Jul 24, 2015 • Reading time: 8 minutes • Mahdi

In this article, I’m going over creating an autocompletion/prediction system using a data-structure called Trie, it’s fast and easy to customize.

• ## ES7 Array and Generator comprehensions Jun 6, 2015 • Reading time: 6 minutes • Mahdi

Array comprehension is a new feature proposed for ES7, with a new syntax to create new arrays from existing iterables, comprehensions can replace map and filter.

• ## BroadcastChannel API Apr 2, 2015 • Reading time: 3 minutes • Mahdi

BroadcastChannel API is a new API used to communicate between same-origin tabs opened by the same user.