Starting a blog!
Published:
I figured it would be fun to keep a record of all the projects I’m working on in a blog format, so I’ve set up the blog page on my website! You’ll be able to access this page at any time by going to ahl27.com/blog!
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Forth for R
3 minute read
Published:
I’ve always enjoyed learning about different programming languages. Different languages come with different specialties, paradigms, and constraints. As said in a recent talk at Strange Loop, the languages we know affect how we think about and approach problems.
dendrapply and How To Contribute to R
5 minute read
Published:
If you’ve been following my blog posts, you know that I previously refactored R’s dendrapply function. After some initial feedback from R-devel, I was encouraged to apply for the R Project Sprint at the University of Warwick in the UK.
Refactoring R’s dendrapply
15 minute read
Published:
As someone who specializes in comparative phylogenomics, I work a lot with phylogenetic trees. Trees are represented in R as dendrogram objects, which are essentially a series of nested lists. Each “node” of the tree is a list with multiple members (two if a binary tree, but dendrogram objects are not constrained to be binary), each of which is another dendrogram object. The leaves are special cases in that they have length 1 and an additional property leaf, which is set to TRUE.
Finishing the 6502 Emulator
1 minute read
Published:
This will be a short blog post–I’ve officially finished v1.0.0 of my 65c02 emulator. Since last time, I’ve fixed a bunch of bugs, finished implementing the 65C02 extended opcode set (including the Rockwell/WDC bit set/clear instructions and test-and-branch instructions), and wrote assembly scripts to test the implementation of (nearly) all the opcodes. The only ones I haven’t thoroughly checked are the Rockwell/WDC extended instructions (e.g. RMB0, SMB0, BBR0, BBS0). I’ve also updated the GUI to graphically iterate through instructions when (r)un is input, meaning you can set up an infinite loop and watch it iterate through. The iteration executes at the same speed the computer normally would (determined by the clock speed), so you can watch it step through programs at slow speeds if you’d like.