10h ago · 8 min read · At problem 47 I thought I was making progress. At problem 83 I was confident. At problem 100 I felt ready. Then I failed the interview. Not because the problem was impossibly hard. Because I had solve
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Apr 21 · 2 min read · Store events, not current state Day 117 of 149 👉 Full deep-dive with code examples The Bank Statement Analogy Your bank doesn't just show your balance: It keeps every transaction ever Deposit $100, withdraw $20, transfer $50... You can see exactly...
Join discussionApr 21 · 2 min read · Separate read and write models Day 116 of 149 👉 Full deep-dive with code examples The Library Analogy Imagine a library: Reading books → Sit in reading room, browse catalog Adding new books → Different process, involves cataloging, labeling Readi...
Join discussionApr 20 · 13 min read · Every Git client I've ever used treats merge conflicts the same way: show the markers, let the human figure it out. Even for the obvious ones — a lockfile where both branches bumped a version number,
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Apr 13 · 2 min read · Break big problems into small ones Day 109 of 149 👉 Full deep-dive with code examples The Pizza Party Analogy You have to cut a huge pizza for 8 people: You don't make 8 cuts at random You cut in half first (2 pieces) Then each half in half (4 pie...
Join discussionApr 12 · 2 min read · Moving window across data Day 108 of 149 👉 Full deep-dive with code examples The Train Window Analogy Imagine looking out a train window: You see a fixed portion of the scenery As the train moves, the view changes Old scenery slides out left, new ...
Join discussionApr 11 · 2 min read · Scanning from both ends Day 107 of 149 👉 Full deep-dive with code examples The Dance Partners Analogy Imagine a line of people finding dance partners: One person starts from the left Another starts from the right They move toward each other until ...
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