Javascript Closures

gistfile1.txt

// Closures are sometimes unintuitive!

console.log('the smart way');

funs = []
for (var a = 0; a < 3; a++){
    funs.push(function(){
        var newa = a;
        return function(){console.log(newa);}
    }())
}

for (var i = 0; i < 3; i++){
    funs[i]();
}


console.log('the naive way');
funs = [];
(function(){  // the function block for scope doesn't help at all here, it's just to 
              // say that this doesn't help
    for (var a = 0; a < 3; a++){
        funs.push(function(){console.log(a);});
    }
})();

for (var i = 0; i < 3; i++){
    funs[i]();
}