Category Archives: Programming

An Emacs Lisp Based Common Lisp

Lars Brinkhoff has a really interesting project up at GitHub. It’s emacs-cl, a Common Lisp implemented in Emacs Lisp. This probably isn’t all that useful but it sure is awesome. As far as I can tell, it’s a pretty complete. … Continue reading

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Latency

Every programmer understands, at least in a general way, the relative latency of various computer operations. For example, we all know that accessing a value from a CPU register is faster than accessing that value from an L1 cache is … Continue reading

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Working Through SICP

As I’ve said many times before, I’m a huge fan of The Structure and Interpretation of Computer Programs (SICP), Hal Abelson’s and Jerry Sussman’s seminal work on computer science. It’s a tremendous resource and one that’s available on the Web … Continue reading

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Narrowing to Multiple Regions

One of the joys of writing this blog is the things I learn from the comments. The other day, I wrote about fancy-narrow and that provoked an interesting discussion between Wilfred and Phil. Wilfred compared fancy-narrow to narrow-to-region-indirect. I assumed … Continue reading

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Getting Started With the Common Lisp Hyperspec

Jean-Philippe Paradis over at HexstreamSoft has a nice page about getting started with the Common Lisp Hyperspec. If you’re already familiar with the Hyperspec, you’re probably with most of the material. If you’re not, it’s a nice introduction. One thing … Continue reading

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SBCL 1.1.17

SBCL 1.1.17 is out. As usual, it built and passed the tests without problems. This months release has a bunch of bug fixes and a couple of enhancements/optimizations. See the NEWS page for details. And no, despite Rainer Joswig’s April … Continue reading

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Generating Graphs from an Org Mode File

I came across this tweet from Sacha Chua Mwahaha! Learned a lot about Org Babel + Graphviz on the way to making http://t.co/vB7qusi7RR . Used fill-region to wrap labels. #emacs =D — Sacha Chua (@sachac) March 20, 2014 and decided … Continue reading

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CSS By Example

Via Jean-Philippe Paradis, I came across this CSS tutorial by Xah Lee. It’s nice because the page shows several examples of CSS effects. When you click on an effect, it takes you to a short tutorial that discusses the effect … Continue reading

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Variadic Comparisons in Emacs Lisp

One of the ways that Emacs Lisp differs from other Lisps is that it doesn’t support multiple arguments for comparisons. That is, you can’t write things like (if (= a b c) do-this else-do-that) or (when (< a b c) … Continue reading

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Git Flow

Recently I’ve seen a lot of articles about git-flow but it was sort of hard to understand exactly how to integrate into your work flow. Happily Kevin Basarab has come to the rescue with a video that shows you how … Continue reading

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