Can you alter a Javascript function after declaring it?

Question

Let\'s say I have var a = function() { return 1; }. Is it possible to alter a so that a() returns 2? Perhaps by editing a

Answer 1

var a = function() { return 1; }
alert(a()) // 1
a = function() { return 2; }
alert(a()) // 2

technically, you're losing one function definition and replacing it with another.