handle closure affect by iife step 2

iife_handle_closure_affect_step_2.js

var result = [];
for(var year = 0; year < 5; year++) {
    (function() {
        var y = year;
        result.push(function() { return y; });
    })();
}
console.log(result[1]()); // 1
console.log(result[3]()); // 3