#3474: Add a strict variant of iterate to Data.List -------------------------------------+------------------------------------- Reporter: mux | Owner: (none) Type: proposal | Status: new Priority: normal | Milestone: 8.2.2 Component: libraries/base | Version: 6.10.4 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by winter): I suppose a modification from `fold'` 's document is OK: -- | The strict version of 'iterate'. -- It ensures that each step of the iterating is forced to weak head normal form before next step, avoiding the collection of thunks that would otherwise occur. This is often what you want to strictly step a function which produces a single, monolithic result (e.g. (+1)). -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/3474#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler