Browser hacking: Let's implement JavaScript arrays!

[Swirlstudios]

Setting the array length property in JS is actually an interesting thing. If you set it to a value above the actual length, in some implementations it will do nothing, and in others it will create "non-iterable" empty slots. If you set it to a value lower than the actual length, then it will truncate the array and allow the elements in indices above the new length to be garbage collected.

[MrHarry]

As someone who's trying to write a transpiler, this is super helpful. Thank you

[SlyEcho]

6:50 You also have to consume the optional last comma like [ 1, 2, 3, ] is still valid.

[JustSomeAussie]

That's a cool wallpaper. Where'd you get it?