DRY is a Trade-Off

Fri 11 December 2020 by Moshe Zadka

DRY, or Don't Repeat Yourself is frequently touted as a principle of software development. "Copy-pasta" is the derisive term applied to a violation of it, tying together the concept of copying code and pasta as description of software development bad practices (see also spaghetti code).

It is so uniformly reviled …

read more

Fifty Shades of Ver

Sat 19 September 2020 by Moshe Zadka

Computers work on binary code. If statements take one path: true, or false. For computers, bright lines and clear borders make sense.

Humans are more complicated. What's an adult? When are you happy? How mature are you? Humans have fuzzy feelings with no clear delination.

I was more responsible as …

read more

Universal Binary

Thu 20 August 2020 by Moshe Zadka

I have written before about my Inbox Zero methodology. This is still what I practice, but there is a lot more that helps me.

The concept behind "Universal Binary" is that the only numbers that make sense asymptotically are zero, one, and infinity. Therefore, in order to prevent things from …

read more

The Hardest Logic Puzzle Ever (In Python)

Fri 24 July 2020 by Moshe Zadka

The Labyrinth is a children’s movie. The main character is 16 years old, and solving a logic puzzle that will literally decide if she lives or dies. In fiction, characters are faced with realistic challenges: ones they can solve, even if they have to make an effort.

So, it …

read more

Hey, Back Off!

Sun 12 July 2020 by Moshe Zadka

The choice in parameters for back-off configuration is important. It can be the difference between a barely noticable blip in service quality and an hours-long site outage. In order to explore the consequences of the choice, I wrote a little fictional ditty about a fictional website.

I hope you enjoy …

read more

A Labyrinth of Lies

Fri 03 July 2020 by Moshe Zadka

In the 1986 movie Labyrinth, a young girl (played by Jennifer Connelly) is faced with a dilemma. The adorable Jim Henson puppets explain to her that one guard always lies, and one guard always tells the truth. She needs to figure out which door leads to the castle at the …

read more

Conditionally Logging Expensive Tasks

Sat 13 June 2020 by Moshe Zadka

(I have shown this technique in my mailing list. If this kind of thing seems interesting, why not subscribe?)

Imagine you want to log something that is, potentially, expensive to calculate. For example, in DEBUG mode, you would like to count the classes of the objects in gc.get_objects() and …

read more

My Little Pony -- DevOps is Magic

Sun 26 April 2020 by Moshe Zadka

(This article is based on the one I originally published on OpenSource.com.)

In 2010, the My Little Pony franchise was rebooted with the animated show My Little Pony: Friendship is Magic. The combination of accessibility to children with the sophisticated themes the show tackled garnered a following that cut …

read more

Numbers in Python

Sun 26 April 2020 by Moshe Zadka

Numbers in Python come in all shapes and forms. The reason different kind of representations of numbers exist is because they all have different trade-offs. These trade-offs are often surprising!

Integers

The most surprising things about integers is how easily they stop being integers. Dividing two integers, for example, 4 …

read more

Goodbye, John H. Conway

Tue 21 April 2020 by Moshe Zadka

John H. Conway passed away ten days ago, and I think it's only now I can write a proper eulogy.

I was first introduced to his work, if not his name, when I was at the end of elementary school. I am sure everyone has heard about the Game of …

read more