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Within LTS Haskell 24.2 (ghc-9.10.2)

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1. singleton :: a -> [a]

   base	Data.List

   Construct a list from a single element.

   Examples

   >>> singleton True
   [True]
   

   >>> singleton [1, 2, 3]
   [[1,2,3]]
   

   >>> singleton 'c'
   "c"
   

2. singleton :: a -> NonEmpty a

   base	Data.List.NonEmpty

   Construct a NonEmpty list from a single element.

3. singleton :: Word8 -> ByteString

   bytestring	Data.ByteString

   O(1) Convert a Word8 into a ByteString

4. singleton :: Char -> ByteString

   bytestring	Data.ByteString.Char8

   O(1) Convert a Char into a ByteString

5. singleton :: Word8 -> ByteString

   bytestring	Data.ByteString.Lazy

   O(1) Convert a Word8 into a ByteString

6. singleton :: Char -> ByteString

   bytestring	Data.ByteString.Lazy.Char8

   O(1) Convert a Char into a ByteString

7. singleton :: Word8 -> ShortByteString

   bytestring	Data.ByteString.Short

   O(1) Convert a Word8 into a ShortByteString

8. singleton :: Word8 -> ShortByteString

   bytestring	Data.ByteString.Short.Internal

   O(1) Convert a Word8 into a ShortByteString

9. singleton :: Char -> Text

   text	Data.Text

   O(1) Convert a character into a Text. Performs replacement on invalid scalar values.

10. singleton :: Char -> Builder

    text	Data.Text.Internal.Builder

    O(1). A Builder taking a single character, satisfying

    • toLazyText (singleton c) = singleton
      c

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