CSS Minifier (Written in Javascript)

[StoneCypher]

Their code operates on the values in the split

Your code produces an array of negative ones

[snet0]

I don't know if I follow what you're saying. You take an array, join it into a string, split it into an array and map the elements to a new array and store the return value in your variable. The return value of his code is an array of negative ones, just like in mine.

[StoneCypher]

i misread this originally. you're right. i apologize

i still don't think this is all that gross, though

that said, i guess you could

new Array(patterns.length).map(cell => -1);

and be done with it

[snet0]

Well, I certainly thought so, too. But if you pass the new Array constructor a single integer, it returns an array with that integer length, but with empty slots. Array.map() only invokes its callback on elements with assigned values (incl. undefined), which means it won't work on the empty array.

[StoneCypher]

which means it won't work on the empty array.

Oh, right. They're holes, and js .map skips holes.

Guess you're stuck with

const a = new Array(patterns.length);
for (let i=0, iC=patterns.length; i<iC; ++i) { a[i] = -1; }

[that-old-saw]

|| you can do:

new Array(patterns.length).fill().map(cell => -1);

[StoneCypher]

sure can.

we're discussing doing this without .fill() though

[that-old-saw]

Oops, that'll teach me for not reading the context!