Notes
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Seconds since 1970, and the year it runs out A signed 32-bit timestamp overflows in January 2038. Thirteen digits mean milliseconds, and that is the bug you will actually hit. Title case has four rules and they disagree AP capitalises words of four letters or more. Chicago lowercases every preposition. Both are correct, in different houses. How long will this take to read, or to say 238 words a minute silently, 130 aloud. That factor of two is why a blog post makes a bad script. What exactly is being counted "Hello, world." is thirteen characters, twelve without spaces, ten letters and two words. Each answers a different question. The 128 characters everything else was built on ASCII fits in seven bits and half of it is punctuation and control codes. The gaps in the table are not accidents. Five foot nine is not 5.9 feet Feet and inches is a base-twelve system wearing decimal clothes. The same mistake as reading 7.45 hours as seven forty-five. The units that share a name Three tons, two gallons, two horsepowers and a calorie that depends on a capital letter. The arithmetic is never the problem. White, pink and brown are precise terms The colours of noise describe how power falls with frequency. White sounds harsh because most of its energy is up high. Why programmers count in sixteens One hex digit is exactly four bits. That single fact is the whole reason hexadecimal exists. A browser timer is not a clock Counting up one tick at a time drifts. Reading a monotonic clock each frame does not, and that is why some timers are wrong by minutes. 7:45 is not 7.45 The single most common payroll arithmetic error, and it runs in both directions. Minutes divide by sixty, not a hundred. Churn is the whole business Five per cent monthly churn means an average customer lasts twenty months. That single reciprocal sets every other number.
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