Pure functions in Functional Programming provide the same result
when provided the same arguments.
They are not allowed to read or write to system resources such as
file system, console, clock, network, etc. In addition, they may
not read/write to module level variables.
In D, they are allowed to mutate parameters which seems to
violate purity. Why did D make this choice and when to best
exploit this architectural decision.
Also, would you agree that not mutating parameters to have "true"
purity would be preferred?
- When should pure function modify ... Brother Bill via Digitalmars-d-learn
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