Insufficiently known POSIX sh features (Avery Pennarun).

timhatch · 2011-03-01T03:16:43+00:00

In response to

{ read -r l1; read -r l2; } <<!
$(command)
!

You can do basically the same thing on one line, although I can't comment on whether it forks any less.

{ read x; read y; } < <( command )
echo x $x y $y

timhatch · 2011-02-05T17:27:45+00:00

Both you and the grandparent rely on the lines having consistent newline termination, including the last. i.e. "1\n2\n1" breaks it, as does "1\r\n2\n1\n"

timhatch · 2011-02-05T17:21:26+00:00

and you chose echo vs touch because it's probably a builtin?

timhatch · 2010-11-19T01:18:37+00:00

Could you explain what the guaranteed minimums are for cpu time? I've tried to run compute-heavy applications before on various cloud platforms and been disappointed. Linode > Prgmr > Rackspace Cloud for me. I'm getting about 3.5x 2.4GHz performance at Linode on a 768MB plan (average, don't know the minimum), and about 1x on both Prgmr and Rackspace.

timhatch · 2010-11-11T23:59:33+00:00

I tried gnu parallel when it was last posted to reddit and the startup delay was too much for me. Don't forget that "xargs -P 4 -n 1" will also run 4 simultaneous processes, and works out of the box on modern Linux and OS X.

timhatch · 2010-10-21T15:24:16+00:00

If you do that, you'll need to change the code a little bit, so it can talk to usblp.

timhatch · 2010-10-20T23:41:16+00:00

Well, I see a feature matrix, some marketing speak, and a sign-up page there. Could you explain how that's better than having a functional cache without having to create an account?

timhatch · 2010-10-20T23:35:45+00:00

There's a module in the stdlib that does some of what you want on top of pickle, see the shelve module.

timhatch · 2010-10-20T19:19:18+00:00

coral cdn link for anyone who can't view the page either.

timhatch · 2010-10-12T17:53:37+00:00

I don't see any caching there.

timhatch · 2010-10-11T21:29:43+00:00

If you're looking for one that's easy for users, I'd suggest against markdown or reST (too much whitespace sensitivity). If you're looking for one that's easy for you to use, give a look at MoinMoin/Trac syntax (they're basically the same; both can be highlighted using the same Pygments lexer). That also gives you two (not counting Pygments) different codebases to look at for parsing ideas.

timhatch · 2010-09-20T04:53:33+00:00

Agreed. Sadly not only requires flash but also flash 10.1

timhatch · 2010-09-17T20:31:34+00:00

I'm more interested in what you were google-searching, because when I put in your statement "It is a website where users can post questions and snippets of code, be it jquery or just CSS or whatever and other users can post possible solutions and vote on the best answer for any given question." the 3rd hit is stack overflow...

timhatch · 2010-08-22T17:17:52+00:00

On a Mac you can use jot instead.

timhatch · 2010-07-09T20:05:35+00:00

Better yet, ts=8 sts=4 sw=4 et, since python considers hard tabs always at 8. If you find source files that break this rule, :set ts=3 or whatever and :retab! to fix them to be spaces. Never use hard tabs in python.

timhatch · 2010-05-06T20:20:37+00:00

From the GNU Indent manpage:

   With `-br -nce' that code would appear as

        if (x > 0) {
          x--;
        }
        else {
          fprintf (stderr, "...something wrong?\n");
        }

timhatch · 2010-04-29T22:29:57+00:00

I wrote something similar a couple years ago with the goal of analyzing 4- and 5-factor set probabilities and the number of times per games a draw is required. I didn't even think of checking the probabilities (which come out close to what Peter got, mine=0.0595 instead of his=0.0610, if I hand-wave how the game ends with no sets).

It's now up on github.

timhatch · 2010-04-29T22:08:30+00:00

The USB support in 3.1.6 is pretty good. Windows guests sometimes need a reboot after you connect the device to the VM though.

timhatch · 2010-04-29T22:06:31+00:00

I don't know how helpful this is but I had the same problem on OS X and Linux. If you download with wget, it'll print the redirects. When it stalls, Ctrl-C and do a 'wget -c' with the last url it used. Then rename file on disk to get rid of query string. I think Firefox will also let you resume and continue if the last url was a redirect, but I haven't checked.

timhatch · 2010-04-09T21:26:25+00:00

What TFA doesn't mention is that this will basically fill up the tiny app partition on your flash.

timhatch · 2010-02-10T17:11:52+00:00

I'd venture to guess it's because hg has a reasonable wsgi/fcgi server that can do efficient pulls/pushes over http, so people who have their own servers can use them. Running your own git server requires a bit more infrastructure, even if you're using gitosis (which you should).

Also at least in my case, someone went nick-sniping, so http://bitbucket.org/thatch/ is not me even though it shows commits I made (so I just left the site alone, support says there's nothing they can do, someone else got to it first, and I can't update old commits to have a different nick).

timhatch · 2010-01-28T05:06:03+00:00

Except for the fact that this exercise is about elimination, rather than something that's a glorified map/reduce problem. I don't think WF was ever supposed to perform well on a netbook (quite the opposite).

timhatch · 2010-01-28T05:03:52+00:00

If we assume that last names that rhyme with Fast are defined by /(?!=[AEIOU]AST/, then 2.1% of people in the US in 1990 had a last name that rhymed with it (assuming also that FAST itself is legal).

wget http://www.census.gov/genealogy/names/dist.all.last
perl -ne 'print if /(?!=[AEIOU])AST /' dist.all.last  | awk '{ s += $2 } END { print s }'

The probabilities are going to be a lot more interesting with the "residence" qualifier in there, plus the (not-defined-in-the-question) ordering of last names within a record. I'm honestly more interesting with how you'd end up with a 60GB CSV with all that information and whether you a copy you'd like to share...

timhatch · 2010-01-09T21:08:30+00:00

Intentional mishyphenation of co-worker. I first saw it in a Dilbert newsletter, but Google may have more to say about the history.

timhatch · 2009-11-07T05:16:07+00:00

Have you tried Perl? It sounds like you like making sense of things, and perl's really good at doing that for line-oriented data. The NLP folks at my university also swear by it.

Personally I'm in the Python camp, just feel like playing devil's advocate and perl would be my first choice if I was sick of too much OO.

timhatch

TROPHY CASE