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I always start Matt Might articles thinking "Okay, THIS is the one I'm going to understand all the way to the very end without unlearning what I just read, else

I always start Matt Might articles thinking "Okay, THIS is the one I'm going to understand all the way to the very end without unlearning what I just read, else I die," and alas, I have again died.

vincnetas 6y ago
Me to. Level failed, but then i found this cheat code from apache and at lest i now understand basics. http://commons.apache.org/sandbox/commons-javaflow/ http://commons.apache.org/sandbox/commons-javaflow/
- offbynull 6y ago
  AFAIK Javaflow's been inactive for over a decade. Newer implementations for the same concept include https://github.com/offbynull/coroutines https://github.com/offbynull/coroutines and https://github.com/vsilaev/tascalate-javaflow/ https://github.com/vsilaev/tascalate-javaflow/. Full disclosure: I'm the one who built / owns the first project.
  - dlo 6y ago
    Love it. Lmk if you never need a hand. I was on the core analysis team at Fortify.
  - sjtindell 6y ago
    Thanks for sharing this background and cool project.
  - joel_dice 6y ago
    On the topic of inactive continuation implementations for Java: I implemented native support for both delimited (shift/reset) and non-delimited (call/cc) continuations in the Avian JVM. See https://github.com/ReadyTalk/avian/blob/master/test/extra/ComposableContinuations.java https://github.com/ReadyTalk/avian/blob/master/test/extra/Co... for some mind-bending examples.
azeirah 6y ago
I'm having an ADHD night and I had the same thought, except I haven't died yet. Felt like giving up three times already, but I did have a click moment after playing around with a scheme repl for a couple of minutes. I understand the first example of call/cc now! (display (call/cc (lambda (cc) (display "I got here.\n") (cc "This string was passed to the continuation.\n") (display "But not here.\n")))) Edit: Tried playing around with mit-scheme, but it doesn't work with the ctrl-v'ing the examples. Chezscheme does work.
- hencq 6y ago
  It seems that MIT-Scheme needs the cc function to be a function of 1 argument (the return value for the continuation)[0] Changing it to the following should work: (let ((start #f)) (if (not start) (call/cc (lambda (cc) (set! start cc)))) (display "Going to invoke (start)\n") (start #f)) [0] https://www.gnu.org/software/mit-scheme/documentation/stable/mit-scheme-ref/Continuations.html#Continuations https://www.gnu.org/software/mit-scheme/documentation/stable...
- DonaldPShimoda 6y ago
  For what it's worth, almost any time Matt writes about Scheme he's likely using Racket so it'd be worth trying that for his posts!

I always start Matt Might articles thinking "Okay, THIS is the one I'm going to understand all the way to the very end without unlearning what I just read, else I die," and alas, I have again died.

vincnetas 6y ago

Me to. Level failed, but then i found this cheat code from apache and at lest i now understand basics. http://commons.apache.org/sandbox/commons-javaflow/ http://commons.apache.org/sandbox/commons-javaflow/

offbynull 6y ago
AFAIK Javaflow's been inactive for over a decade. Newer implementations for the same concept include https://github.com/offbynull/coroutines https://github.com/offbynull/coroutines and https://github.com/vsilaev/tascalate-javaflow/ https://github.com/vsilaev/tascalate-javaflow/. Full disclosure: I'm the one who built / owns the first project.
- dlo 6y ago
  Love it. Lmk if you never need a hand. I was on the core analysis team at Fortify.
- sjtindell 6y ago
  Thanks for sharing this background and cool project.
- joel_dice 6y ago
  On the topic of inactive continuation implementations for Java: I implemented native support for both delimited (shift/reset) and non-delimited (call/cc) continuations in the Avian JVM. See https://github.com/ReadyTalk/avian/blob/master/test/extra/ComposableContinuations.java https://github.com/ReadyTalk/avian/blob/master/test/extra/Co... for some mind-bending examples.

azeirah 6y ago

I'm having an ADHD night and I had the same thought, except I haven't died yet. Felt like giving up three times already, but I did have a click moment after playing around with a scheme repl for a couple of minutes. I understand the first example of call/cc now! (display (call/cc (lambda (cc) (display "I got here.\n") (cc "This string was passed to the continuation.\n") (display "But not here.\n")))) Edit: Tried playing around with mit-scheme, but it doesn't work with the ctrl-v'ing the examples. Chezscheme does work.

hencq 6y ago
It seems that MIT-Scheme needs the cc function to be a function of 1 argument (the return value for the continuation)[0] Changing it to the following should work: (let ((start #f)) (if (not start) (call/cc (lambda (cc) (set! start cc)))) (display "Going to invoke (start)\n") (start #f)) [0] https://www.gnu.org/software/mit-scheme/documentation/stable/mit-scheme-ref/Continuations.html#Continuations https://www.gnu.org/software/mit-scheme/documentation/stable...
DonaldPShimoda 6y ago
For what it's worth, almost any time Matt writes about Scheme he's likely using Racket so it'd be worth trying that for his posts!