id -package:haskell-lsp-types -package:mixed-types-num -package:blaze-html

id :: a -> a
base Prelude Data.Function GHC.Base, xmonad-contrib XMonad.Config.Prime
Identity function. 
id x = x
This function might seem useless at first glance, but it can be very useful in a higher order context.

Examples

>>> length $ filter id [True, True, False, True]
3

>>> Just (Just 3) >>= id
Just 3

>>> foldr id 0 [(^3), (*5), (+2)]
1000
id :: forall (a :: k) . Category cat => cat a a
base Control.Category, base-prelude BasePrelude, classy-prelude ClassyPrelude, basement Basement.Compat.Base Basement.Imports, foundation Foundation, dimensional Numeric.Units.Dimensional.Prelude, rebase Rebase.Prelude, quaalude Essentials
the identity morphism
id :: a -> a
amazonka-core Amazonka.Prelude, hedgehog Hedgehog.Internal.Prelude, base-compat Prelude.Compat, relude Relude.Function, rio RIO.Prelude, numeric-prelude NumericPrelude NumericPrelude.Base, Cabal-syntax Distribution.Compat.Prelude, universum Universum.Function, ihaskell IHaskellPrelude, github GitHub.Internal.Prelude, clash-prelude Clash.HaskellPrelude, ghc-lib-parser GHC.Prelude.Basic, copilot-language Copilot.Language.Prelude, incipit-base Incipit.Base, LambdaHack Game.LambdaHack.Core.Prelude, cabal-install-solver Distribution.Solver.Compat.Prelude, faktory Faktory.Prelude, loc Data.Loc.Internal.Prelude, yesod-paginator Yesod.Paginator.Prelude, distribution-opensuse OpenSuse.Prelude, hledger-web Hledger.Web.Import
Identity function. 
id x = x
id :: a -> a
ghc GHC.Prelude.Basic, stack Stack.Prelude
id :: Category k cat => forall (a :: k) . cat a a
basic-prelude CorePrelude
the identity morphism
id :: Refinement
clay Clay Clay.Attributes
id :: () => a -> a
prelude-compat Prelude2010
Identity function. 
id x = x
id :: T a a
synthesizer-core Synthesizer.Causal.Process
id :: a x -> a (Id x)
defun-core DeFun.Function
id :: WriteAttr Element String
threepenny-gui Graphics.UI.Threepenny.SVG Graphics.UI.Threepenny.SVG.Attributes
id :: ScalarType
graphql Language.GraphQL.Type
The ID scalar type represents a unique identifier, often used to refetch an object or as key for a cache. The ID type appears in a JSON response as a String; however, it is not intended to be human-readable. When expected as an input type, any string (such as "4") or integer (such as 4) input value will be accepted as an ID.
id :: a <-> a
invertible Data.Invertible.Function Data.Invertible.Prelude
Identity bijection.
id :: Num prob => T prob a
probability Numeric.Probability.Transition
id :: Category arrow => T arrow sample sample
synthesizer-dimensional Synthesizer.Dimensional.Arrow Synthesizer.Dimensional.Map
id :: T s sample sample
synthesizer-dimensional Synthesizer.Dimensional.Causal.Process
id :: Node -> !Integer
cayley-client Database.Cayley.Types
id :: CoinDetails -> String
cryptocompare CryptoCompare
id :: MMD0 -> ULONG
med-module Sound.MED.Raw.MMD0
id :: MMD1 -> ULONG
med-module Sound.MED.Raw.MMD1
id :: MMD2 -> ULONG
med-module Sound.MED.Raw.MMD2
id :: MMD3 -> ULONG
med-module Sound.MED.Raw.MMD3
id :: Attribute -> CompressedWord
rattletrap Rattletrap.Type.Attribute
id :: CustomDemolish -> I32
rattletrap Rattletrap.Type.Attribute.CustomDemolish
id :: Category cat => cat a a
free-categories Control.Category.Free
the identity morphism
id :: Element a -> ByteString
n2o-nitro Network.N2O.Nitro