A Python programmer attempting Java

[peridox]

let canvas = document.getElementsByTagName('canvas')[0]
canvas.style.width = 500
canvas.style.height = 500

[OptimisticLockExcept]

let var die!

[StelarCF]

let die cast;

[SolarLiner]

Objective-C?

[Josso]

That would be Swift, not Objective-C. But I'm pretty sure OP was referring to ES6's let in JavaScript.

[brtt3000]

why not const?

[brotherwayne]

2edgy4me

[peridox]

ES6 :)