Peter's Dance Party

Old CS Notes

2010-07-11T00:00:00-07:00

Carry Look-ahead Adder

Binary Integer Division

Next time I need to do binary integer division by hand I'm sure this will be useful. It could also serve as a hilarious interview question.

Lambda Calculus

Emacs variable eval-expression-print-length

2009-04-12T00:00:00-07:00

Often I'll use (pp) or (message) to inspect a data structure in elisp. For example lets say I have a list l:


(setq l '(1 2 3 4 5 6 7 8 9 10 11 12 13 14 15))
(message  l)
 => (1 2 3 4 5 6 7 8 9 10 11 12 ...)

Often times I want to see the entire list instead of the truncated version. That's where eval-expression-print-length comes in. Setting this variable to nil results in the entire list being printed.


(message "%s" eval-expression-print-length)
 => 12
(setq eval-expression-print-length nil)
(message "%s" l)
 => (1 2 3 4 5 6 7 8 9 10 11 12 13 14 15)

Interesting Links for 01-19-2009

2009-01-20T00:00:00-08:00

emacs-oauth
Finally got oauth.el released.

Interesting Links for 01-18-2009

2009-01-19T00:00:00-08:00

My Brightest Diamond, Clare & the Reasons - "Moon River & Ice Ice Baby"
My Brightest Diamond...Amazing

Interesting Links for 01-16-2009

2009-01-17T00:00:00-08:00

Aruba Networks Introduces PCI Compliance Reporting in New AirWave Wireless Management Suite 6.2

Emacs function of the day: (make-indirect-buffer)

2009-01-17T00:00:00-08:00

(make-indirect-buffer base-buffer name &optional clone)


Create and return an indirect buffer for buffer base-buffer, named name.
base-buffer should be a live buffer, or the name of an existing buffer.
name should be a string which is not the name of an existing buffer.
Optional argument clone non-nil means preserve base-buffer's state,
such as major and minor modes, in the indirect buffer.
clone nil means the indirect buffer's state is reset to default values.

Ran across this function today. Occasionally I want to have the same file open to different locations in different frames. You can do this, but when you change buffers in one of those frames, you lose the location of your point. (make-indirect-buffer) solves this problem quite nicely.

Its always fun to learn a new useful emacs function.

Interesting Links for 01-08-2009

2009-01-09T00:00:00-08:00

Richard John Neuhaus, 1936-2009

Interesting Links for 01-07-2009

2009-01-08T00:00:00-08:00

Richard John Neuhaus, 1936-2009
Airwave's New Office Space
Video of our new space before we moved in. Nothing was magnetted to the ceiling when the video was taken.

Interesting Links for 2009-01-01

2009-01-02T00:00:00-08:00

Source code containing the Z2K9 zune bug
The offending function is ConvertDays() at 249.
Slideshow: Facial Expressions of Keanu Reeves

Interesting Links for 2008-31-12

2009-01-01T00:00:00-08:00

Catching disk latency in the act
Wow. This makes me long for dtrace. Maybe its time to try nexenta?
Intelligentsia on Broadway banishes urn coffee