I’ve seen this issue mentioned in some random and hard to reach places on the Net, so I thought I’d re-express it here for those who find Google sending them this way.
I’ve been managing my Ledger project with Git for some time now, and I’ve finally settled into a comfortable groove concerning branches and where to commit stuff.
Back in late 2007, Paul Graham put up an essay titled “How to Do Philosophy”, in which Mr. Graham hoped to elucidate where Philosophy went wrong and why the field, as now practiced, must be renovated to remain useful. In fact, he goes so far as to suggest that much of philosophy has no benefit whatsoever:
The proof of how useless some of their answers turned out to be is how little effect they have. No one after reading Aristotle’s Metaphysics does anything differently as a result.
If I may, as a student of philosophy, I would like to offer my response to this argument, whose tenets have been repeated many times throughout Philosophy’s history.
Create a list of primes “as you go”, considering a number prime if it can’t be divided by any number already considered prime.
However, although my straightforward solution worked on discrete ranges, it couldn’t yield a single prime when called on an infinite range – something I’m completely unused to from other languages, except for some experience with the SERIES library in Common Lisp.
Haskell may be difficult to start out with, but once things start rolling, they roll fast. Yesterday (real world time, these blog entries are staggered) I had started the first lines of HackPorts, but now things are getting close to done for the first version. It’s not that I’ve written much code, but that it was simple to integrate with other people’s code.
As I explore Haskell, I’m discovering that one of its trickiest aspects is not structuring things functionally, but the lazy evaluation. It turns out lazy evaluation comes with both great benefits, and significant difficulties. I’d like to point a few of these out, as they’re becoming clearer to me.
I’ve been reading Real World Haskell now, after having finished the delightful Learn You a Haskell Tutorial. I’m up to chapter 6, about to dive into Typeclasses. In the meantime, I’ve picked a toy project that also has a taste of usefulness: a script to convert the Hackage database into MacPorts Portfiles, respecting inter-package and external library dependencies. I call it HackPorts, of course.
Recently I changed how the content on this site was generated, from using the standalone OS X application RapidWeaver, to the server-side publishing platform Movable Type. During that transition I changed the site’s style to the minimalist default offered by MT, which uses its own CSS for column layout and typography.
Tonight I finally got around to switching the site back to blueprint-css, which I very much prefer. I used the superb application CSSEdit to help me massage Movable Type’s style into something that compatible with Blueprint’s own typography and layout.
I hope the result is pleasing. If anyone sees strange artifacts or display issues, please let me know. I’m aware code examples were being truncated on the right side before, but this should be corrected now. More on Haskell to come soon!
Today I need a wrapper script to drop arguments from a command-line. I instinctively reached for bash, but then thought it would be a good exercise for my infant Haskell knowledge.
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