Author Archives: Sheldon "Don" Sandbekkhaug

How do I make protocol methods optional in Objective-C?

Posted on September 2, 2020

Imagine you have a protocol in Obective-C. What if you want to make some properties or methods optional? You can use the optional keyword. Not all objects to implement the protocol will have the -speed method. Trying to call -speed … Continue reading →

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A Quiz to Practice Big O for a Software Interview

Posted on July 24, 2020

Estimating big O is a crucial part of software engineering interviews. If you can write decent code, but can’t analyze big O, interviewers will mentally subtract points from your score. Tips for analyzing Big O Consider the worst case Think … Continue reading →

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A Small Note After George Floyd

Posted on July 5, 2020

On May 25, an African American man named George Floyd was murdered by police officers. It was a tragedy, and not the first. I haven’t focused on this blog in recent months. After George Floyd, I wasn’t sure what to … Continue reading →

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The Battle of the Burgers: Food Chain Magnate

Posted on January 18, 2020

In the spring of 1955, the county government gave me a small loan so that I could open a diner in our little town. But I wasn’t the only one—three other aspiring food chain magnates also started restaurants, and the … Continue reading →

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How to Structure Your Presentation to be Clear and Convincing

Posted on June 11, 2019

Have you ever sat in a meeting where you felt bored? You had to endure a presentation where the speaker read several paragraphs per slide, all in monotone. Some rando in the room kept asking useless questions, prolonging the presentation. … Continue reading →

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