Note: this is fixed in ES6. Using `let` instead of `var` will treat each iteration's variable as distinct: a = [] for (let i = 0; i <3; i++) a.

Note: this is fixed in ES6. Using `let` instead of `var` will treat each iteration's variable as distinct: a = [] for (let i = 0; i <3; i++) a.push(() => console.log('hi ' + i)) for (let e of a) e() Logs: hi 0 hi 1 hi 2 Actually, it's almost surprising in the opposite direction now.