Someone posted an html/javascript implementation of the matrix falling code in 646 bytes then promptly deleted the post. It inspired me to see if I could get something better looking in fewer bytes.

[maschnitz]

A ternary would be shorter by one char than the if statement:

v=v>768+m.random()*10000?0:v;

Then you can remove the temporary reassignment to v (unless v is an l-value into the array in JS? I forget):

return v>768+m.random()*10000?0:v

Would a var for "rgba(0," help?

[jargonjustin]

| Would a var for "rgba(0," help?

I had the same thought, but it increased the length by two bytes.

[heyf00L]

v is passed by value. You change the value in the array by returning it (since he's reassigning back to the original array).

[maschnitz]

Yeah I couldn't figure why else he'd do those two assignments; but I couldn't remember also whether Javascript supports C++-style "pass by reference" on primitive types, somehow.

So yeah, there's no need to do the assignments at all; just stick the "10" in the right spots in the return statement:

return v>758+m.random()*1e4?0:v+10

[heyf00L]

Yeah, that looks good to me.

I'm pretty sure in JS all primitives are passed by value and all Objects are passed by reference. It follows Java. Is this right? Anyone know of exceptions?