> Var is broken in js because it does not obey sensible semantics Scoping is broken in pretty much all modern dynamic languages. Take Ruby for example: i

> Var is broken in js because it does not obey sensible semantics Scoping is broken in pretty much all modern dynamic languages. Take Ruby for example: i = 10 [1, 2, 3].map{|i| i * 3} [1, 2, 3].map{|j| j * 3} puts i # prints 3 puts j # raises undefined local variable Or let's look at Python: def maybe_append(b=[], n = None): if not n is None: b.append(n) return b print maybe_append(n=20) # prints [20] print maybe_append(n=30) # prints [20, 30] So there's only a single instance of [], so that the default argument "grows" over time.