The blog explains how to solve the following problem using Picat and planner programming, a form of logic programming:

Suppose that at the beginning there is a blank document, and a letter “a” is written in it. In the following steps, only the three functions of “select all”, “copy” and “paste” can be used.

Find the minimum number of steps to reach at least 100,000 a’s (each of the three operations of “select all”, “copy” and “paste” is counted as one step). If the target number is not specified, and I want to get the exact amount of "a"s, is there a general formula?

- Math Stack Exchange

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What a great blog. Thanks!

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Programming Languages

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Hello!

This is the current Lemmy equivalent of https://www.reddit.com/r/ProgrammingLanguages/.

The content and rules are the same here as they are over there. Taken directly from the /r/ProgrammingLanguages overview:

This community is dedicated to the theory, design and implementation of programming languages.

Be nice to each other. Flame wars and rants are not welcomed. Please also put some effort into your post.

This isn’t the right place to ask questions such as “What language should I use for X”, “what language should I learn”, and “what’s your favorite language”. Such questions should be posted in /c/learn_programming or /c/programming.

This is the right place for posts like the following:

  • “Check out this new language I’ve been working on!”
  • “Here’s a blog post on how I implemented static type checking into this compiler”
  • “I want to write a compiler, where do I start?”
  • “How does the Java compiler work? How does it handle forward declarations/imports/targeting multiple platforms/<other tricky feature>?”
  • “How should I test my compiler? How are other compilers and interpreters like gcc, Java, and python tested?”
  • “What are the pros/cons of <language feature>?”
  • “Compare and contrast <language feature> vs. <other feature>”
  • “Confused about the semantics of this language”
  • “Proceedings from PLDI / OOPSLA / ICFP / <other large programming conference>”

See /r/ProgrammingLanguages for specific examples

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