GitHub - kelas/ooj: the origins of J
"One summer weekend in 1989, Arthur Whitney visited Ken Iverson at Kiln Farm and produced — on one page and in one afternoon — an interpreter fragment on the AT&T 3B1 computer. I studied this interpreter for about a week for its organization and programming style; and on Sunday, August 27, 1989, at about four o'clock in the afternoon, wrote the first line of code that became the implementation des
J Notation as a Tool of Thought
Kenneth Iverson’s 1964 language, APL, won him the Turing Award. His award lecture, Notation as a Tool of Thought, argued that better notations would lead people to deeper insights about mathematics. He provided a number of examples ranging across linear algebra, arithmetic, probability, and logic. Unfortunately, most of the mathematics he covers isn’t relevant to programming. However, his core ide
J can look like APL or English
J can look like APL or English Redisplaying the ASCII notation of J as APL characters. J1 is a concise, interpreted array programming language which looks infamously like line noise. It is the successor to APL, which is a concise, interpreted array programming language which looks infamously like hieroglyphics. Because J uses only ASCII characters, it has to condense a lot of meaning into a constr
Handwriting Programs in J • Hillel Wayne
I think by hand. It’s easier for me to write my first drafts on a tablet and type them up afterwards. I can’t do this with code, though. Here’s me scrawling out a python function as fast as possible: That took three times longer to write than type. Something about code being optimized for legibility and IDE usage and lame stuff like that. I still like the idea of writing code, though, so I looked
Haskell - J for Haskell Programmers
The J programming language is like Forth. Both are old-school and obscure. Both have quirky syntax thanks to a dead simple parser and unorthodox choices. Both encourage point-free style. Both insist on terminology that evokes comparisons with natural languages, e.g. Forth calls functions words, while J calls them verbs. However, several features make a J interpreter more challenging to write than
J Can be Readable
You must be kidding me! It’s like programming using regular expressions… You’ll never make me do that again! I’m looking at the code and feel like an idiot. Isn’t it really an esoteric language like brain fuck? Does anyone really use it? And such programs can be read afterwards? quicksort=: (($:@(<#[), (=#[), $:@(>#[)) ({~ ?@#)) ^: (1<#) Perl is a trifle against it. About J language J — is a Korea
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Random walk in 2 lines of J
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