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And it's really bad practice (at least in Haskell) to truly break immutability. Uses of unsafePerformIO are strongly urged to be "observationally immutable, pur

by tel 13y ago

And it's really bad practice (at least in Haskell) to truly break immutability. Uses of unsafePerformIO are strongly urged to be "observationally immutable, pure, safe, transparent".