IndexOf

Back to a variable. Also this time there is a lot of text:

let a = 0;

a = a - "Strings can help to increment our variable with this number:".indexOf('1') // a = 1

Baseball bat

This is first time when variable name isn’t a:

let baseball_bat = 0;

baseball_bat += 0==[[[[[[]]]]]] // BONK! baseball_bat = 1

unDEfined

This one is more complex:

let a = 0;

a = a + (""+a[a])[3].charCodeAt() - (""+a[a])[2].charCodeAt(); // a = 1

Simple math

Okay, here we go!

First example is really tiny. Well, it’s still weird.

let a = 0;

a -=- 1; // a = 1