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  1. lookupMeta :: Text -> Meta -> Maybe MetaValue

    pandoc-types Text.Pandoc.Definition

    Retrieve the metadata value for a given key.

  2. lookupEnv :: String -> IO (Maybe String)

    basement Basement.Environment

    Lookup variable in the environment

  3. lookupSub :: forall nm b (v :: Type -> Type) n m . IsName nm => nm -> SubMap b v n m -> Maybe [Subdiagram b v n m]

    diagrams-core Diagrams.Core

    Look for the given name in a name map, returning a list of subdiagrams associated with that name. If no names match the given name exactly, return all the subdiagrams associated with names of which the given name is a suffix.

  4. lookupName :: forall nm (v :: Type -> Type) m n b . (IsName nm, Metric v, Semigroup m, OrderedField n) => nm -> QDiagram b v n m -> Maybe (Subdiagram b v n m)

    diagrams-core Diagrams.Core.Types

    Lookup the most recent diagram associated with (some qualification of) the given name.

  5. lookupSub :: forall nm b (v :: Type -> Type) n m . IsName nm => nm -> SubMap b v n m -> Maybe [Subdiagram b v n m]

    diagrams-core Diagrams.Core.Types

    Look for the given name in a name map, returning a list of subdiagrams associated with that name. If no names match the given name exactly, return all the subdiagrams associated with names of which the given name is a suffix.

  6. lookupWithDefault :: ByteString -> CI ByteString -> Headers -> ByteString

    snap-core Snap.Types.Headers

    Look up the value of a given HTTP header field or return the provided default value when that header field is not present. Example: 

    ghci> :set -XOverloadedStrings
ghci> let hdrs = H.fromList [("Host", "localhost")]
ghci> H.lookupWithDefault "host" "127.0.0.1" $ hdrs
"localhost"
ghci> H.lookupWithDefault "Accept" "text/plain" $ hdrs
"text/plain"

  7. lookupRawFieldInput :: MonadHandler m => Text -> m [Text]

    yesod-form Yesod.Form.Functions

    The raw parameter values the named field was run against in this request, whether from a direct submission or a Post/Redirect/Get replay (runFormPRG). Empty if no form containing the field has run with a submission in this request (e.g. generateFormPost, or an identifyForm-wrapped form that was not the one submitted). This lets the view of a field rendering several inputs under one name restore all of the user's raw input after a failed submission: the Either Text a argument a view receives can only carry the first submitted value. Only fields run through mreq/mopt (and the applicative/widget helpers built on them) record their values here.

  8. lookupMode :: AnyMode -> YiM AnyMode

    yi-core Yi.Mode.Common

    Check whether a mode of the same name is already in modeTable and returns the original mode, if it isn't the case.

  9. lookupTag :: Tag -> TagTable -> [(FilePath, Int)]

    yi-core Yi.Tag

    Find the location of a tag using the tag table. Returns a full path and line number

  10. lookupEnv :: PandocMonad m => Text -> m (Maybe Text)

    pandoc Text.Pandoc.Class

    Lookup an environment variable.

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