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Notices by David Thompson (davexunit@quitter.se), page 2

  1. David Thompson (davexunit@quitter.se)'s status on Friday, 25-Mar-2016 13:31:36 UTC David Thompson David Thompson
    left-pad is even funnier when you learn that its O(n^2) instead of O(n) http://qttr.at/18m6
    In conversation Friday, 25-Mar-2016 13:31:36 UTC from quitter.se permalink

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    1. No result found on File_thumbnail lookup.
      Leftpad
      By programmingpraxis from Programming Praxis

      Large portions of the internet failed a few days ago when a program called leftpad, which pads a string to a given length by adding spaces or other characters at the left of the string, was suddenly removed from its repository. The whole episode is sad, and brings nothing but shame on everyone involved (though everyone involved seems to think they acted properly throughout), and all of the web sites that broke were created by fools (you don’t rely on unknown third parties to maintain code critical to your application at some unknown place on the internet). You can read more about what happened at these links: good overview of what happened, Azer’s statement, NPM’s statement, and satire. The code that caused the problem is shown below:

      module.exports = leftpad;

function leftpad (str, len, ch) {
  str = String(str);

  var i = -1;

  if (!ch && ch !== 0) ch = ' ';

  len = len - str.length;

  while (++i < len) {
    str = ch + str;
  }

  return str;
}

      Your task is to write a proper version of leftpad; make sure yours operates in linear time instead of the quadratic time caused by the string concatenation in Azer’s code. When you are finished, you are welcome to read or run a suggested solution, or to post your own solution or discuss the exercise in the comments below.

      We first build the prefix, then perform a single append:

      (define (leftpad str len ch)
  (let loop ((n (- len (string-length str)))
             (prefix (list)))
    (if (positive? n)
        (loop (- n 1) (cons ch prefix))
        (string-append (list->string prefix) str))))

> (leftpad "hello" 7 #\@)
"@@hello"

      You can run the program at http://ideone.com/zPY6S6.

  2. David Thompson (davexunit@quitter.se)'s status on Wednesday, 23-Mar-2016 13:12:06 UTC David Thompson David Thompson
    There's a GNU Guix GSoC project in which a student will create a build system and importer for NPM packages. Maybe then we'll have sanity.
    In conversation Wednesday, 23-Mar-2016 13:12:06 UTC from quitter.se permalink
  3. David Thompson (davexunit@quitter.se)'s status on Monday, 21-Mar-2016 13:57:32 UTC David Thompson David Thompson
    Word I'm tired of reading: microservice
    In conversation Monday, 21-Mar-2016 13:57:32 UTC from quitter.se permalink
  4. David Thompson (davexunit@quitter.se)'s status on Saturday, 19-Mar-2016 22:09:12 UTC David Thompson David Thompson
    Thanks to everyone that came to see me and Chris Webber talk about GNU Guix today at #LibrePlanet! It was a great time!
    In conversation Saturday, 19-Mar-2016 22:09:12 UTC from quitter.se permalink
  5. David Thompson (davexunit@quitter.se)'s status on Sunday, 28-Feb-2016 03:53:39 UTC David Thompson David Thompson
    Disappointing South Carolina primary results. Still rooting for Bernie.
    In conversation Sunday, 28-Feb-2016 03:53:39 UTC from quitter.se permalink
  6. David Thompson (davexunit@quitter.se)'s status on Friday, 15-Jan-2016 18:30:36 UTC David Thompson David Thompson
    "Why I don't support or contribute to GitHub repositories" https://wubthecaptain.eu/articles/why-i-dont-support-github.html
    In conversation Friday, 15-Jan-2016 18:30:36 UTC from quitter.se permalink
  7. David Thompson (davexunit@quitter.se)'s status on Thursday, 14-Jan-2016 15:20:10 UTC David Thompson David Thompson
    in reply to
    • Christopher M. Hobbs
    @cmhobbs it doesn't always apply, but I see it *a lot*.
    In conversation Thursday, 14-Jan-2016 15:20:10 UTC from quitter.se permalink
  8. David Thompson (davexunit@quitter.se)'s status on Thursday, 14-Jan-2016 14:08:04 UTC David Thompson David Thompson
    When a class in an OOP language ends in "er", a simple function would likely have been better.  OOP often adds complexity to simple tasks.
    In conversation Thursday, 14-Jan-2016 14:08:04 UTC from quitter.se permalink
  9. David Thompson (davexunit@quitter.se)'s status on Tuesday, 22-Dec-2015 17:22:22 UTC David Thompson David Thompson
    The new trend in "modern" software development is to combine the VCS, build system, and package manager into one inseparable trash heap.
    In conversation Tuesday, 22-Dec-2015 17:22:22 UTC from quitter.se permalink
  10. David Thompson (davexunit@quitter.se)'s status on Friday, 18-Dec-2015 17:53:11 UTC David Thompson David Thompson
    things free software devs should do: make a self-hostable NewRelic replacement
    In conversation Friday, 18-Dec-2015 17:53:11 UTC from quitter.se permalink
  11. David Thompson (davexunit@quitter.se)'s status on Thursday, 17-Dec-2015 14:11:40 UTC David Thompson David Thompson
    in reply to
    • Yuri Albuquerque
    @denommus Guile is a multi-paradigm language, which is a positive thing. Guix code is written in a purely functional style.
    In conversation Thursday, 17-Dec-2015 14:11:40 UTC from quitter.se permalink
  12. David Thompson (davexunit@quitter.se)'s status on Tuesday, 24-Nov-2015 13:30:33 UTC David Thompson David Thompson
    I have a feeling that advocates of static languages do not write software that is intended to be user extensible.
    In conversation Tuesday, 24-Nov-2015 13:30:33 UTC from quitter.se permalink
  13. David Thompson (davexunit@quitter.se)'s status on Tuesday, 20-Oct-2015 17:17:15 UTC David Thompson David Thompson
    in reply to
    • Christopher M. Hobbs
    @cmhobbs literally anything else.  JSON, s-expressions, XML, etc.
    In conversation Tuesday, 20-Oct-2015 17:17:15 UTC from quitter.se permalink
  14. David Thompson (davexunit@quitter.se)'s status on Tuesday, 20-Oct-2015 16:25:30 UTC David Thompson David Thompson
    YAML is the worst markup language I've ever seen. Can we stop using it? Pretty please?
    In conversation Tuesday, 20-Oct-2015 16:25:30 UTC from quitter.se permalink
  15. David Thompson (davexunit@quitter.se)'s status on Monday, 19-Oct-2015 12:40:22 UTC David Thompson David Thompson
    in reply to
    • Tristan B. Kildaire
    @deavmi "The Little Schemer" and "Structure and Interpretation of Computer Programs" from MIT Press.
    In conversation Monday, 19-Oct-2015 12:40:22 UTC from quitter.se permalink
  16. David Thompson (davexunit@quitter.se)'s status on Monday, 19-Oct-2015 12:15:40 UTC David Thompson David Thompson
    in reply to
    • Tristan B. Kildaire
    @deavmi Yes, Scheme to be precise.
    In conversation Monday, 19-Oct-2015 12:15:40 UTC from quitter.se permalink
  17. David Thompson (davexunit@quitter.se)'s status on Saturday, 14-Feb-2015 22:20:43 UTC David Thompson David Thompson
    Can't find any active meetup group for #Scheme programmers in #Boston.  Anyone else interested in such a thing?
    In conversation Saturday, 14-Feb-2015 22:20:43 UTC from quitter.se permalink
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