JawnV6 posted:

eugh, im missing so much mockables today

wtf arent you smart? get hired and paid for the things you do

Gazpacho posted:

i suppose if you wants to write actual programs in 100% continuation passing style by hand that's the language to do it in

tef posted:

node.js

rotor posted:

ok so quick summary for those of you just joining us: tbc is always wrong, internaut doesn't know wtf, janin, well, janin is janin, spiders is mostly right and jawn and tef are always right. now, back to the thread, already in progress.

Gazpacho posted:

I thought i'd put in a little and write up what I mean. I've had this in the back of my mind for a few weeks but I've never seen it discussed online because Forth is a kind of ghetto language to academics. Take your naive Fibonacci in Javascript.

code:

function fib(n) {
  if(n < 2)
    return 1;
  else {
    return fib(n - 1) + fib(n - 2);
}

Next transform just the fib function to continuation style. Note that it's starting to look like postfix because you have the two recursive fibs first then the addition.

code:

function fib(n, cont) {
  if(n < 2)
    cont(1);
  else {
    fib(n - 1, function(x) {
      fib(n - 2, function(y) {
        cont(x + y);
      });
    });
  }
}

Now go all out and transform the operators and control statements as well.

code:

function fib(n, cont) {
  op<(n, 2, function(x0) {
    ifelse(x0,
      function() { cont(1); },
      function() {
        op-(n, 1, function(x1) {
          fib(x1, function(x2) {
            op-(n, 2, function(x3) {
              fib(x3, function(x4) {
                op+(x2, x4, cont);
              });
            });
          });
        });
      });
    });
}

From this you can read off the corresponding Forth code line by line.

code:

// ": fib" (define fib)
function fib(n, cont) {
  // "dup" (preserve n for later use) "2 <"
  op<(n, 2, function(x0) {
    // "if"
    ifelse(x0,
      // "drop" (n not used on this branch) "1"
      function() { cont(1); },
      // "else"
      function() {
        // "dup" (preserve n) "1 -"
        op-(n, 1, function(x1) {
          // "fib"
          fib(x1, function(x2) {
            // "swap" (reach up the stack past x2 to get n for last use) "2 -"
            op-(n, 2, function(x3) {
              // "fib"
              fib(x3, function(x4) {
                // "+ then" (end of false branch) ";" (call cont)
                op+(x2, x4, cont);
...

Result:

code:

: fib dup 2 < if drop 1 else dup 1 - fib swap 2 - fib + then ;

There's a quirk here that the second cont call translates to ; but the first doesn't. colorForth actually handles this consistently so "else" becomes ";".

tef posted:

why not learn postscript instead of forth rotor

Deuterieux posted:

what, no, don't pound that screw into your dick. use this nail instead!

tinselt0wn posted:

im "learning" j again

quicksort=: (($:@(<#[) , (=#[) , $:@(>#[)) ({~ ?@#)) ^: (1<#)

suck it legibility havers

JawnV6 posted:

Shaggar posted:

i was thinking about getting an arduino but i couldnt think of any problems 2 solve.

Inverse Icarus posted:

i made a wireless hygrometer to keep track of the humidity/temp in my humidors for my cigars, but it turns out the arduino will just suck a battery dry for no loving reason

then i got really lazy and some computer game came out and i stopped playing with it

i should really pick it back up

Shaggar posted:

i was thinking about getting an arduino but i couldnt think of any problems 2 solve.

Sweevo posted:

have you thought about using it to make an LED flash?

Sweevo posted:

i dont think you understand how stupid the arduino community is

ahhh spiders posted:

did you implement any kind of sleep mode or anything

Inverse Icarus posted:

yes, but the sleep is lovely

it still dies after like 11 hours on a 9v battery

i looked into using other types of batteries but a bunch of people online have found the same thing using a bunch of AAs or li-poly whatever

simply running through the arduino's circuit drains the battery, even when it's not doing anything

what i really need to do is make a small circuit on a timer that supplies power to the arduino itself, like rotor told me to months ago, but again, lazy

ppp posted:

use a msp430