| layout | page |
|---|---|
| title | 401.19 Reading Notes |
| permalink | /401-R19/ |
- Within functional programming, purity is the goal of mathematical evaluation that is independent of state. Exact definitions vary but tend to focus on the consistent evaluation of a function given the same arguments. Impure functional programming may use data structures or input and output which might evaluate differently given a change in data outside of the function or structure itself.
-
As the order of evaluation will not impact the returns, evaluation of expressions can be delayed until a later reference (lazy evaluation).
-
Lack of interaction between two functions means that the functions may be executed in parallel.