4,494
edits
Richard Stallman: Difference between revisions
Jump to navigation
Jump to search
m
Text replacement - "<source" to "<syntaxhighlight"
m (Text replacement - "\[\[Category:People\|([^]]*)\]\]" to "{{DEFAULTSORT:$1}}Category:People") |
m (Text replacement - "<source" to "<syntaxhighlight") |
||
| Line 3: | Line 3: | ||
'''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: | ||
<blockquote>Rho, rho, rho of X<br>Always equals 1<br>Rho is dimension, rho rho rank.<br>APL is fun!<ref>Stallman, Richard M. [https://stallman.org/doggerel.html#APL "Doggerel"]</ref></blockquote> | <blockquote>Rho, rho, rho of X<br>Always equals 1<br>Rho is dimension, rho rho rank.<br>APL is fun!<ref>Stallman, Richard M. [https://stallman.org/doggerel.html#APL "Doggerel"]</ref></blockquote> | ||
This plays on the fact that < | This plays on the fact that <syntaxhighlight lang=apl inline>⍴X</source> gives the [[shape]] (length of each [[axis]]; "dimension") of <syntaxhighlight lang=apl inline>X</source> while <syntaxhighlight lang=apl inline>⍴⍴X</source> 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 <syntaxhighlight lang=apl inline>1</source> if a [[vector]], and <syntaxhighlight lang=apl inline>⍴</source> always returns a vector: | ||
< | <syntaxhighlight lang=apl> | ||
⎕←X←3 1 4∘.+2 7 1 8 | ⎕←X←3 1 4∘.+2 7 1 8 | ||
5 10 4 11 | 5 10 4 11 | ||