Comments for Mathematical Pamphlet

Comment on Debugging with Open Recursion Mixins by Kenn

Kenn — Mon, 12 May 2008 21:35:32 +0000

Thanks for the great links, ccshan. I enjoyed both papers very much. I found especially interesting how all three developments, when you include the paper I linked, make subtly different choices about the division of functionality between combinators.

Comment on Debugging with Open Recursion Mixins by ccshan

ccshan — Mon, 12 May 2008 20:44:07 +0000

You'd probably enjoy McAdam's "That About Wraps it Up" and Swadi, Taha, Kiselyov, and Pašalić's "A Monadic Approach for Avoiding Code Duplication When Staging Memoized Functions". The latter authors cite DeMeuter and McAdam.

Comment on CTL Model Checking in Haskell: A Classic Algorithm Explained as Memoization by Mathematical Pamphlet » Debugging with Open Recursion Mixins

Mathematical Pamphlet » Debugging with Open Recursion Mixins — Sat, 10 May 2008 21:19:29 +0000

[…] having just finished a post using open recursion, it immediately cried out to me that open-recursive functions already have some debugging hooks for […]

Comment on Drawing fractals in Haskell with a cursor graphics DSEL and a cute list representation by List convolutions « blog :: Brent -> [String]

List convolutions « blog :: Brent -> [String] — Tue, 22 Apr 2008 20:23:55 +0000

[…] Then list concatenation is just function composition — O(1) instead of O(n). Kenn Knowles wrote about this representation recently, and Don Stewart has written the dlist package implementing it. We don’t require a whole […]

Comment on Using HaXml to make a PDF slideshow from an Inkscape SVG by Kenn

Kenn — Mon, 21 Apr 2008 15:48:40 +0000

I got this Wacom Bamboo mostly because it was so cheap. (Student budget)

Comment on Using HaXml to make a PDF slideshow from an Inkscape SVG by Björn Buckwalter

Björn Buckwalter — Mon, 21 Apr 2008 13:04:05 +0000

Nice. What tablet model did you get? I'd like to be able to embed images (in particular free-form drawings from a tablet) in my literate haskell code, perhaps as XML or some mime-encoded binary format(?). Would of course need a decent editor to go with it…

Comment on Using HaXml to make a PDF slideshow from an Inkscape SVG by Kenn

Kenn — Mon, 21 Apr 2008 05:52:51 +0000

Comment on Using HaXml to make a PDF slideshow from an Inkscape SVG by ingolia

ingolia — Sun, 20 Apr 2008 20:15:04 +0000

I was just today thinking about making animated slides from an Inkscape SVG file by generating a set of PDF files with only a subset of layers. This seems like a pretty good place to start.

For this project, when you don't need to examine or update the top-level element itself, I found it useful to use

myFilterElem cfilt (Elem _ _ contents) = concatMap cfilt contents layerNames = map verbatim . myFilterElem getLayerNames . xmlElem

and similarly

filterLayers layerPred doc = myOnContent (visible o onlyLayer) doc where onlyLayer = iffind "inkscape:label" layerOrBG keep layerOrBG l = if layerPred l then keep else none

myOnContent cfilt (Document p s (Elem en ea contents) m) = Document p s (Elem en ea (concatMap cfilt contents)) m

Comment on Drawing fractals in Haskell with a cursor graphics DSEL and a cute list representation by max630

max630 — Fri, 18 Apr 2008 05:37:58 +0000

now it works for mee too

Comment on Drawing fractals in Haskell with a cursor graphics DSEL and a cute list representation by Kenn

Kenn — Fri, 18 Apr 2008 03:56:04 +0000

max360,

Thanks for the bug. I think I have done as you suggest. It does not crash for me so I am not sure.