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Published on 2009-09-08T15:46:22Z
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For example, given 1 8 4 9 0 2 , return 3. Thanks.
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It's not a practically important issue, but could you please provide me with an example of tacit programming in F# where my `pointless' functions can have multiple arguments (not in form of list or tuple);
And secondly, where those functions can manipulate a complex data structure. I'm trying to…
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Hi!
I have a question about what exact role do higher-order compinators (or function producers) hold in concatenative/tacit programming.
Additionally I would like to ask if there is another way to implement concatenative programming language rather than directly manipulating the stack.
This might…
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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 function
(<;. 2) ((2&(~:/\)),1:)
which tests successive list entries for inequality, returns a…
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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.
Currently, I am trying to solve Problem 56. Let me stress that I already know what the right answer is, since I've…
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If you're not familiar with the Rowland prime sequence, you can find out about it here. I've created an ugly, procedural monadic verb in J to generate the first n terms in this sequence, as follows:
rowland =: monad define
result =. 0 $ 0
t =. 1 $ 7
while. (# result) < y do.
…
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When I was at University 30 years ago, I used a programming language called APL. I believe the acronym stood for "A Programming Language",
This language was interpretive and was especially useful for array and matrix operations with powerful operators and library functions to help with that.
Did…
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I'm writing code in C++, but I really like K/APL's array-oriented style.
Does anyone know of a good set of operator overloading tricks / macros / ... to allow some K/APL -style programming in C++?
Thanks!
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I am aware of J & K; but neither are open source.
I'm also aware of A+, but that seems outdated.
Is there any decent open source implementation of APL?
If so, where; is not, why?
Thanks!
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I came across J/K/APL a few months ago while working my way through some project euler problems, and was intrigued, to say the least. For every elegant-looking 20 line python solution I produced, there'd be a gobsmacking 20 character J solution that ran in a tenth of the time. I've been keen to learn…
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we had a discussion about this language at work... Who works with that today?
Don't we normally favor readability over smallest number of lines?
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