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  • June 22, 2025
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Arithmetic for fun and profit

Four years ago I wrote a blog post about simple solutions to client problems. The post opens by recounting a conversation with a friend that ended with my friend saying “So, basically you’re recommending division.” That conversation came back to me recently when I had a similar conversation during a

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  • June 22, 2025
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Why use hash puzzles for proof-of-work?

A couple days ago I wrote about the the problem that Bitcoin requires to be solved as proof-of-work. In a nutshell, you need to tweak a block of transactions until the SHA256 double hash of its header is below a target value [1]. Not all cryptocurrencies use proof of work,

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  • June 21, 2025
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Minimize squared relative error

Suppose you have a list of positive data points y1, y2, …, yn and you wanted to find a value α that minimizes the squared distances to each of the y‘s. Then the solution is to take α to be the mean of the y‘s: This result is well known

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  • June 20, 2025
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What is the Bitcoin proof-of-work problem?

In order to prevent fraud, anyone wanting to add a block to the Bitcoin blockchain must prove that they’ve put in a certain amount of computational work. This post will focus on what problem must be solved in order produce proof of work. You’ll see the proof of work function

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  • June 20, 2025
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Defending the realm: Trust and safety at Stack Overflow

In this special episode, Ryan is joined by our Senior VP of Community, Philippe Beaudette, and the Trust and Safety team at Stack Overflow to discuss maintaining platform integrity and managing user safety, handling complex issues like harassment, and how their team balances transparency and privacy online.

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  • June 19, 2025
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Deleting vs Replacing Names

This post looks at whether you should delete names or replace names when deidentifying personal data. With structured data, generating synthetic names does not increase or decrease privacy. But with unstructured data, replacing real names with randomly generated names increases privacy protection. Structured data If you want to deidentify structured

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  • June 19, 2025
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“My job is going to change in a dramatic way”: Exploring the future of the internet with Cloudflare

In this episode of Leaders of Code, Jody Bailey, Chief Product and Technology Officer at Stack Overflow, sits down with Dane Knecht, the newly appointed Chief Technology Officer at Cloudflare.

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  • June 18, 2025
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Angular Signals: A New Mental Model for Reactivity, Not Just a New API

Discover how Angular Signals revolutionize data flow with reactive variables, not streams. Learn production gotchas, when to choose Signals over RxJS, and real-world patterns Continue reading Angular Signals: A New Mental Model for Reactivity, Not Just a New API on SitePoint.

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  • June 18, 2025
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Learn like a lurker: Gen Z’s digital-first lifestyle and the future of knowledge

As a generation characterized as "digital natives," the way Gen Z interacts with and consumes knowledge is rooted in their desire for instant gratification and personalization. How will this affect the future of knowledge management and the technologies of tomorrow?

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  • June 18, 2025
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Typesetting Sha and Bitcoin

I went down a rabbit hole this week using two symbols in LaTeX. The first was the Russian letter Sha (Ш, U+0248), and the second was the currency symbol for Bitcoin (₿, U+20BF). Sha I thought there would be a LaTeX package that would include Ш as a symbol rather

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