New Elm user here. I’m a very experienced front-end engineer with a preference for functional languages. (I’ve studied Haskell and Clojure in my free time for the fun of it.) I also do generative art, normally in JS. I was excited to try out Elm as an alternative for my art projects, but ran into a problem sending large arrays through ports.
Here’s the background:
I’ve got a library that loads images into arrays of integers in JS. In this particular case, I was trying to load an image of a 500x500 heightmap. The image contains 500 x 500 = 250,000 pixels, and each pixel has four channels (red, green, blue, and alpha). So the whole array contained a million elements.
I’ve worked with arrays this size in JS with no problem, but when I tried to pass it through a port to my Elm code, I got a “maximum call stack size exceeded” error. When I tried passing a shorter array through, it worked fine.
Interacting with the image data is a key part of the code for this art project, so I don’t want to just handle that part of the app in JS. There’d be too much back and forth through ports.
Do you all have any thoughts or ideas for getting around this? Maybe I could send smaller pieces of the array through one at a time, and gradually concatenate the full array on the Elm side? I also tried passing the data through as a flag, and ran into the same problem.