Immutable data

What kind of idiot needs to have his data kept constant to keep himself from breaking something? If you can't keep your shit in order without stupid artificial constraints, then you don't know shit about programming.

>>62
You are confusing `data' and `variables'. Data is trivially immutable, yet the restriction 2+2≠5 imposes no restrictions on variables which might, during the lifetime of the program, happen to hold 2 or 5.