j

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Is it possible to do systems programming in J or something close to it?

just wondering if this is possible? if so id like to see some online texts about 开发者_如何学Goit b/c I googled and couldnt find any haha, thanksI\'m tempted to say no. While technically anything is[详细]

2023-01-31 01:53 分类：问答
What's a more concise way to count the number of times an element occurs in a list in J?

Here\'s the (probably naive) way I\'ve done it: count =:开发者_StackOverflow 4 : \'# (#~ =&x) y\'\"1 0 1[详细]

2023-01-17 10:45 分类：问答
Most concise J syntax for creating a numeric matrix

Imagine that I want to take the numbers from 1 to 3 and form a matrix such that each possible pairing is represented, e.g.,[详细]

2023-01-16 20:34 分类：问答
Fiddling with point-free code?

I have been learning the Factor and J lan开发者_Go百科guages to experiment with point-free programming. The basic mechanics of the languages seem clear, but getting a feeling for how to approach algor[详细]

2023-01-14 12:51 分类：问答
Have J style adverbs, forks etc been emulated via libraries in mainstream functional languages?

Has an emulation of J style of super condensed tacit programming via verbs, adverbs, forks, etc., ever been attempted via libraries for mainstream functional languages?[详细]

2023-01-09 21:17 分类：问答
Void Verbs in J

I\'m learning how to use J via online reading and doing some old Java assignments over again using this language, and would like to know how to make a verb that doesn\'t take any operands, or return a[详细]

2023-01-08 11:27 分类：问答
what are some of J's unique features?

I come from a background of C, Fortran, Python, R, Matlab, and some Lisp - and I\'ve read a few things on Haskell. What are some neat ideas/examples in J or other languages from the APL family 开发者_[详细]

2023-01-06 20:20 分类：问答
How do I do file io in J?

I want to be able to read and write files, etc. Ho开发者_JAVA技巧w can I do this?Check out Chapter 28: Data Files of Learning J.[详细]

2023-01-04 01:27 分类：问答
Why do I not get the correct answer for Euler 56 in J?

I\'ve solved 84 of the Project Euler problems, mostly in Haskell. I am now going back and trying to solve in J some of those I already solved in Haskell, as an exercise in learning J.[详细]

2023-01-03 06:45 分类：问答
Abstracting boxed array structures in J

I\'ve been working on a J function for a while, that\'s supposed to scan a list and put consecutive copies of an element into separate, concatenated boxes. My efforts have taken me as far as the funct[详细]

2023-01-02 06:07 分类：问答