3 ms·

From a PL standpoint: 1) APL clearly made good use of an extensive symbol set. Now that many languages support unicode, this is totally do-able. 2) APL is in

From a PL standpoint: 1) APL clearly made good use of an extensive symbol set. Now that many languages support unicode, this is totally do-able. 2) APL is in love with overloading. It's not totally my cup of tea, but you could definitely fit this into many modern languages. 3) I see a whole lot of MATLAB in there. 4) Did... this article actually define any functions at all? Perhaps I missed this. 5) It looks you could easily implement APL as a DSL within an existing language with an extensible parser. Racket, for instance.

jacquesm 12y ago
re. 4) Yes it did, about 1/3 in: ∇ R ← Average V [1] R ← (+/V)÷(⍴V) ∇
avmich 12y ago
3) More correctly would be to say that MATLAB has a whole lot of APL. APL is one of the oldest languages, being developed in 50's. 5) You'll perhaps lose some power. Notation is important - check Ken Iverson's Turing lecture.
deleted 12y ago
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kd0amg 12y ago
5) It looks you could easily implement APL as a DSL within an existing language with an extensible parser. Racket, for instance. I'm working on something along these lines, but not planning on keeping the APL/J-like syntax (the many meanings of juxtaposition makes parsing a line depend on the run time values attached to names). You can get more of the core idea of APL out of prop:procedure than out of extensible parsing.
- michaelfeathers 12y ago
  I've been doing something similar as a gem to add J commands to Ruby: https://github.com/michaelfeathers/jop https://github.com/michaelfeathers/jop The fluent interface is likely to win because I don't want to implement hook and fork.
  - kd0amg 12y ago
    Are dyads only done by putting the other operand in the string of J code? Or is there a nice way to apply a dyad to two Ruby arrays? (I wasn't sure from the Readme if this is already there or your second point in "future directions," and I'm pretty new to Ruby)
    - michaelfeathers 12y ago
      No real nice way. I'm not sure where I am going to go with this, I could use a string interpolation but I'm hesitating.

jacquesm 12y ago

re. 4) Yes it did, about 1/3 in: ∇ R ← Average V [1] R ← (+/V)÷(⍴V) ∇

avmich 12y ago

3) More correctly would be to say that MATLAB has a whole lot of APL. APL is one of the oldest languages, being developed in 50's. 5) You'll perhaps lose some power. Notation is important - check Ken Iverson's Turing lecture.

deleted 12y ago

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kd0amg 12y ago

5) It looks you could easily implement APL as a DSL within an existing language with an extensible parser. Racket, for instance. I'm working on something along these lines, but not planning on keeping the APL/J-like syntax (the many meanings of juxtaposition makes parsing a line depend on the run time values attached to names). You can get more of the core idea of APL out of prop:procedure than out of extensible parsing.

michaelfeathers 12y ago
I've been doing something similar as a gem to add J commands to Ruby: https://github.com/michaelfeathers/jop https://github.com/michaelfeathers/jop The fluent interface is likely to win because I don't want to implement hook and fork.
- kd0amg 12y ago
  Are dyads only done by putting the other operand in the string of J code? Or is there a nice way to apply a dyad to two Ruby arrays? (I wasn't sure from the Readme if this is already there or your second point in "future directions," and I'm pretty new to Ruby)
  - michaelfeathers 12y ago
    No real nice way. I'm not sure where I am going to go with this, I could use a string interpolation but I'm hesitating.