JavaScript "Сlosures" Craziness

script.js

// task to fix this: should output 4, 3, 2, 1, 0

this.index = 5;

while(index--){
    code = window.setTimeout(function(){
        console.log(this.index);
     }.bind(this),500);
}

// 1

this.index = 5;

while(index--){
    code = window.setTimeout(console.log.bind(console, this.index),500);
}

// 2

this.index = 5;

while(index--){
        setTimeout(function(index){
            console.log(index);
         }.bind(this, index),500);
    
}

// 3

this.index = 5;

while(index--){
    code = window.setTimeout((function(idx){
        return function() {
            console.log(idx);
        }
     })(this.index),500);
}

// 4

this.index = 5;

while(index--) with({ index: index }) {
    code = window.setTimeout(function(){
        console.log(index);
     }.bind(this),500);
}

// 5

this.index = 5;

while(index--) with({ index: index }) {
    code = window.setTimeout("console.log("+index+");",500);
}

// 6

this.index = 5;

while(index--) with({ index: index }) {
    code = eval('setTimeout("console.log("+index+");",500)');
}

// 7

this.a = 5;

while(a--) with({ b: a }) {
    code = eval('setTimeout("console.log("+b+");",500)');
}

// 8

try{
    while(a = (++this.a ? (--this.a - 1) : "5")) with({ b: a }) {
        code = eval('setTimeout("console.log("+b+");",500)');
        !~(b) && new Error;
    }
} catch(e){}