Richard Stallman: Difference between revisions
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{{Biography also on Wikipedia}} | {{Biography also on Wikipedia|Stallman|Richard Stallman}} | ||
'''Richard Matthew Stallman''', founder of the GNU Project, was an early adopter of APL, and used it to write a text editor as a high school student in the summer of 1969<ref>Stallman, Richard M. [http://www.lysator.liu.se/history/garb/txt/87-2-rms.txt "RMS Berättar"].</ref>. The same year, he also wrote a now famous rhyme: | '''Richard Matthew Stallman''', founder of the GNU Project, was an early adopter of APL, and used it to write a text editor as a high school student in the summer of 1969<ref>Stallman, Richard M. [http://www.lysator.liu.se/history/garb/txt/87-2-rms.txt "RMS Berättar"].</ref>. The same year, he also wrote a now famous rhyme: | ||
Revision as of 13:33, 6 January 2020
Template:Biography also on Wikipedia
Richard Matthew Stallman, founder of the GNU Project, was an early adopter of APL, and used it to write a text editor as a high school student in the summer of 1969[1]. The same year, he also wrote a now famous rhyme:
Rho, rho, rho of X
Always equals 1
Rho is dimension, rho rho rank.
APL is fun![2]
This plays on the fact that ⍴X gives the shape (length of each axis; "dimension") of X while ⍴⍴X gives the rank (number of axes/dimensions) and since the number of axes is always a count, it is a single number, which has the shape 1 if a vector, and ⍴ always returns a vector:
⎕←X←3 1 4∘.+2 7 1 8
5 10 4 11
3 8 2 9
6 11 5 12
⍴X
3 4
⍴⍴X
2
⍴⍴⍴X
1
References
- ↑ Stallman, Richard M. "RMS Berättar".
- ↑ Stallman, Richard M. "Doggerel"