js is dumb

#microposts

TIL if you do this:

const arrs = new Array(3).fill([]);
arrs[0].push("some val");
arrs[1]; // ["some val"]

They’re all references to the same array… like, why would you ever want that? JS is dumb

So you have to do smth like this instead:

new Array(3).fill(null).map(() => []);
// or this
Array.from({ length: 3 }, () => []);