diff options
Diffstat (limited to 'blog')
| -rw-r--r-- | blog/advent.md | 97 |
1 files changed, 76 insertions, 21 deletions
diff --git a/blog/advent.md b/blog/advent.md index 96303ae..a141c74 100644 --- a/blog/advent.md +++ b/blog/advent.md @@ -1,10 +1,8 @@ -<!-- - -- +++ - -- rss = "Doing Advent of Code in a new programming language each day" - -- date = Date(2022, 12, 26) - -- tags = ["fun", "exp"] - -- +++ - --> ++++ +rss = "Doing Advent of Code in a new programming language each day" +date = Date(2022, 12, 26) +tags = ["fun", "exp"] ++++ # Advent of Programming Languages @@ -100,42 +98,85 @@ had I chosen differently. ## Day Six -Bit set and byte queue in D +The [sixth problem][p06] essentially asked for maintaining a finite queue +of English letters until it is distinct. The most efficient way to do this +is employing bit shifting for the FIFO and a bit set for the letters. +[I implemented that][s06] literally in the [Better C] subset of [D]. -poor docs +Although the language is around my age and influenced the big names +like modern C++, Swift and Zig,[^cmp] its documentation is pretty underwhelming +and inconsistent. For instance, the 128-bit integer type `cent` is documented +as a [basic data type], however it only exists in the [core.int128] library +with more cumbersome usage (and doesn't work with `dmd -betterC`). -no hyphen +Like with Nim, D compilers also don't allow hyphens in source filenames, +so I had to pipe the code to `dmd -of=a.out -` (the executable name +would be randomized otherwise). ## Day Seven -Janet PEG parse console log +On the first [Wednesday] of the month of celebration, the [problem][p07] +was parsing `cd` and `ls`-like invocation and output to reconstruct +a directory tree and do, uh, tree stuff. [Janet]'s [PEG module] +was much more [delightful][s07] for parsing than regular expression +on steroids like Raku's [grammar]. + +Writing imperative code in Lisp syntax felt dirty, though it's IMHO +a quite better take than Lua, which is understandable as it was originally +a redesign of [Fennel]. ## Day Eight -2D dynamic programming in Fortran -hardcoded size +The [eighth problem][p08] could be efficiently solved via dynamic programming +on multidimensional arrays so I [used][s08] Fortran for array programming. +There's not much to say other than that it werkt and, ah yea, dynamic allocation +didn't seem worth the effort so I ended up hardcoding the sizes. ## Day Nine -Tcl with hash table +The [ninth task][p09] was about sparse matrix transformation. +Naturally I used hash table in Tcl for this purpose +and the [solution][s09] was straightforward enough. +I am planning on extending a video game's level configuration +to be programmable and the top contenders are now Lua/Fennel, +Janet and Tcl. No idea when I'll get to it, but I'mma keep ya posted. ## Day Ten -AWK w/o loop +On [day 10][p10], I needed to build a less-than-basic[^egg] calculator. +I thought using AWK would spice things up a bit, but it actually simplified +the [solution][s10]. Instead of having to read and parse each operation, +the script is executed for each input line, even allowing interleaving +matching. Therefore, the behavior specification could be followed closely +without any significant effort on adapting the logic for the language. + +I used to think of AWK as just a more verbose sed(1). +I was wrong and am glad that I was. I guess AWK can come in +pretty handy for similar real-world usages, such as log processing +or moderately complex transformation of textual data. ## May Day -[Oops!… I did it again.][^2021] If you think because I published this +[Oops!… I did it again.][^2021] If you thought because I published this right after Christmas it must be a complete advent journal, I have played you for absolute fools! The later problems were increasingly parsing heavy, and while I still had languages I wanted to try, none left was designed for text processing. I was also busy in meatspace at the time thus I couldn't find the time to write byte-level parsers in languages I didn't know. +I didn't try really hard nor got really far, but [in the end] +maybe the [real treasure] was the experiences I had along the way. +I suppose the [contact hypothesis] *might* be true, at least +in this context[;] my prejudice against many languages had been +cleared away even after surface-level interactions. You should probably +also give it a try, who knows, it could be much [gay]er than you'd expect! + [^master]: No, I have not been given any slave. [^2021]: I know, last year I already quit citing how janky later problems were. [^obj]: camelCase was popularized by mainstream object oriented languages. [^re]: Not really, reading byte-by-byte would also work, just less cool. +[^cmp]: I feel underachieved now. +[^egg]: No eggs were harmed in the making of the solution. [UNIST]: https://unist.ac.kr [Advent of Code]: https://adventofcode.com @@ -174,18 +215,32 @@ find the time to write byte-level parsers in languages I didn't know. [weeaboo]: https://en.wikipedia.org/wiki/Japanophilia#21st_century [p06]: https://adventofcode.com/2022/day/6 -[s06]: https://git.sr.ht/~cnx/cp/commit/ +[s06]: https://git.sr.ht/~cnx/cp/commit/f82f0b1a08f1 +[Better C]: https://dlang.org/spec/betterc.html +[D]: https://dlang.org +[basic data type]: https://dlang.org/spec/type.html#basic-data-types +[core.int128]: https://dlang.org/phobos/core_int128.html +[Wednesday]: https://vine.co/v/iM0HnpBebd0 [p07]: https://adventofcode.com/2022/day/7 -[s07]: https://git.sr.ht/~cnx/cp/commit/ +[Janet]: https://janet-lang.org +[PEG module]: https://janet-lang.org/docs/peg.html +[s07]: https://git.sr.ht/~cnx/cp/commit/38d8920c7d7c +[grammar]: https://docs.raku.org/language/grammars +[Fennel]: https://fennel-lang.org [p08]: https://adventofcode.com/2022/day/8 -[s08]: https://git.sr.ht/~cnx/cp/commit/ +[s08]: https://git.sr.ht/~cnx/cp/commit/f8b0528d933f [p09]: https://adventofcode.com/2022/day/9 -[s09]: https://git.sr.ht/~cnx/cp/commit/ +[s09]: https://git.sr.ht/~cnx/cp/commit/cde44cdda55d [p10]: https://adventofcode.com/2022/day/10 -[s10]: https://git.sr.ht/~cnx/cp/commit/ +[s10]: https://git.sr.ht/~cnx/cp/commit/5e4395eab495 [Oops!… I did it again.]: https://en.wikipedia.org/wiki/Oops!..._I_Did_It_Again_(album) +[in the end]: https://www.youtube.com/watch?v=eVTXPUF4Oz4 +[real treasure]: https://www.youtube.com/watch?v=l7r-R61W1DQ +[contact hypothesis]: https://en.wikipedia.org/wiki/Contact_hypothesis +[;]: https://www.youtube.com/watch?v=M94ii6MVilw +[gay]: https://en.wiktionary.org/wiki/gay#Middle_English |