1. 191 ways to echo hello world on the command line

    Wed 08 February 2017 By jarv

    It's been about 12 days since the launch of cmdchallenge, a weekend project to create some common command-line tasks that can be done in a single line of bash. One common request has been to share user-submitted solutions. Or to put it another way, you may be wondering what do random people on the internet and hackernews type if you give them some basic command-line tasks and a shell prompt? Well lucky for me this is no longer a mystery!

    Starting off with Challenge #1:

    CMD Challenge #1: print "hello world" at the bash prompt

    There has been a lot of diverse input for such a simple task. I really love how people do weird stuff even when it is totally unnecessary.

    Here are some of my favorites:

    ( for i in h e l l o \  w o r l d ; do echo "$i" |awk -F, ' {print $NR}'; done ) |tr -d \\n; echo
    echo ifmmp xpsme |tr bcdefghijklmnopqrstuvwxyza abcdefghijklmnopqrstuvwxyz
    touch helloworld && echo "hello world" > helloworld && cat helloworld
    sed 's.\.\...;yhHh\hh;ywWw\ww;2,$d' README

    A few things to note that may clarify some of the more interesting submissions:

    • There is a README in each challenge directory, in this …

    read more
  2. Reddit front-page visualization

    Wed 21 January 2015 By jarv

    Using data from page-watch.com this shows a time-lapse of reddit overnight on January 20th taken at 5minute intervals. This excludes images which is why there are occasional jumps where advertisements are.

  3. page watch

    Tue 20 January 2015 By jarv

    This is probably my last side project before I relocate and start my new job, presenting page-watch. I created it to scratch a personal itch that I had which was I was finding it difficult to track changes on websites that were relatively static with infrequent updates. There are other page monitoring web tools out there, what makes this one different is that it is a) dead simple b) has an rss option.

    If you find it useful I would love to hear what you think, I will hopefully write a follow-up post with more technical details when my life is a little less hectic.

  4. A new new blog

    Thu 18 December 2014 By jarv

    Before this year is over it's time for a small redesign. I've replaced the old custom theme, water-iris with a new theme jarvican. Most of my updates these days are when I redesign the blog and I think I'm fine with that.

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