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It’s been about a year since I started to work for Spotify. That time I wrote a few articles about my job search experience. Among others, I shared how much I underestimated the importance of complexity analysis and the big-O notations when it comes to senior roles. My assumption was that knowing the space and time complexities of the different algorithms and operations on different data structures isn’t something important. Dealing with such issues is rare in most jobs. Still, asking about complexities might be an easy way to rate someone’s knowledge when it comes to candidates with no or short experience. On the other hand, when you’re looking for experienced people, there should be many other more meaningful ways to understand someone else’s skills. I still think that this is true, but I also realized that many big (and small) companies just go with the standard questions involving complexity analysis. Therefore, finally, I collected some complexities and some tips to lear ....
Last month I researched two historical questions. I originally posted summaries on Twitter and am reproducing both here.1 Why Vim Uses hjkl Question: Why does Vim use hjkl and not the arrow keys for navigation? Common Explanation: It keeps your fingers on the home row. Historical Explanation: Bill Joy developed vi on the ADM-3A, which didn’t have dedicated arrow keys. If you look at the ADM keyboard, it put the arrow keys on the hjkl keys. ....