Tag Archives: Emacs-lisp

The challenge was to convert the output from dstat so that all the bytes values (some of which are given as kilobytes or megabytes) to just bytes. Thus, 2k would become 2048 and 3M would become 3145728. Similarly, dstat outputs … Continue reading →

Over at What keramida said…, Giorgos Keramidas poses an interesting problem. Given the following output from dstat, get rid of the B, k, and M suffixes by converting them into bytes. —-system—- —-total-cpu-usage—- –net/eth0- -dsk/total- sda- time |usr sys idl … Continue reading →

If you’ve got a Lisp background—especially a Scheme background—you may have internalized recursion as a looping mechanism and general programming strategy. That doesn’t work with Elisp, of course, because each recursive invocation allocates a stack frame. Not to worry, though, … Continue reading →

One of the most useful data structures in Computer Science is the hash table. I’ve been using them for my entire career and have implemented close to a hundred instances in several languages. That’s not as necessary these days as … Continue reading →

As I mentioned in the post, my An Elisp Challenge post was suggested by this Programming Praxis post. The next Programming Praxis post was a followup that discussed Booth’s Algorithm, which calculates how many left rotations a string must undergo … Continue reading →

Here’s my solution to the recent Elisp challenge. It’s easy to be seduced by the notion of rotating one sequence to see if it’s equal to the other. That would work but the rotation is pretty expensive and the solution … Continue reading →

Here’s a simple Elisp challenge suggested by a problem from by ProgrammingPraxis. We call one string a cycle of another if one string can be transformed into the other by a rotation of the characters. Note that this means They … Continue reading →

Almost all of my tube time is spent in 4 programs: Emacs; Safari; Reeder; and Mail, roughly in that order. Naturally, I try to stay in Emacs as much as I can. In particular, I’ve long bound 【Ctrl+c s】 to … Continue reading →