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1. notElem :: (Foldable t, Eq a) => a -> t a -> Bool

   calligraphy	Calligraphy.Prelude

   notElem is the negation of elem.

   Examples

   Basic usage:

   >>> 3 `notElem` []
   True
   

   >>> 3 `notElem` [1,2]
   True
   

   >>> 3 `notElem` [1,2,3,4,5]
   False
   

   For infinite structures, notElem terminates if the value exists at a finite distance from the left side of the structure:

   >>> 3 `notElem` [1..]
   False
   

   >>> 3 `notElem` ([4..] ++ [3])
   * Hangs forever *
   

2. elem :: (Foldable t, Eq a) => a -> t a -> Bool

   clash-prelude	Clash.HaskellPrelude

   Does the element occur in the structure? Note: elem is often used in infix form.

   Examples

   Basic usage:

   >>> 3 `elem` []
   False
   

   >>> 3 `elem` [1,2]
   False
   

   >>> 3 `elem` [1,2,3,4,5]
   True
   

   For infinite structures, the default implementation of elem terminates if the sought-after value exists at a finite distance from the left side of the structure:

   >>> 3 `elem` [1..]
   True
   

   >>> 3 `elem` ([4..] ++ [3])
   * Hangs forever *
   

3. notElem :: (Foldable t, Eq a) => a -> t a -> Bool

   clash-prelude	Clash.HaskellPrelude

   notElem is the negation of elem.

   Examples

   Basic usage:

   >>> 3 `notElem` []
   True
   

   >>> 3 `notElem` [1,2]
   True
   

   >>> 3 `notElem` [1,2,3,4,5]
   False
   

   For infinite structures, notElem terminates if the value exists at a finite distance from the left side of the structure:

   >>> 3 `notElem` [1..]
   False
   

   >>> 3 `notElem` ([4..] ++ [3])
   * Hangs forever *
   

4. elem :: (Foldable t, Eq a) => a -> t a -> Bool

   dimensional	Numeric.Units.Dimensional.Prelude

   Does the element occur in the structure? Note: elem is often used in infix form.

   Examples

   Basic usage:

   >>> 3 `elem` []
   False
   

   >>> 3 `elem` [1,2]
   False
   

   >>> 3 `elem` [1,2,3,4,5]
   True
   

   For infinite structures, the default implementation of elem terminates if the sought-after value exists at a finite distance from the left side of the structure:

   >>> 3 `elem` [1..]
   True
   

   >>> 3 `elem` ([4..] ++ [3])
   * Hangs forever *
   

5. notElem :: (Foldable t, Eq a) => a -> t a -> Bool

   dimensional	Numeric.Units.Dimensional.Prelude

   notElem is the negation of elem.

   Examples

   Basic usage:

   >>> 3 `notElem` []
   True
   

   >>> 3 `notElem` [1,2]
   True
   

   >>> 3 `notElem` [1,2,3,4,5]
   False
   

   For infinite structures, notElem terminates if the value exists at a finite distance from the left side of the structure:

   >>> 3 `notElem` [1..]
   False
   

   >>> 3 `notElem` ([4..] ++ [3])
   * Hangs forever *
   

6. elem :: (Foldable t, Eq a) => a -> t a -> Bool

   distribution-opensuse	OpenSuse.Prelude

   Does the element occur in the structure? Note: elem is often used in infix form.

   Examples

   Basic usage:

   >>> 3 `elem` []
   False
   

   >>> 3 `elem` [1,2]
   False
   

   >>> 3 `elem` [1,2,3,4,5]
   True
   

   For infinite structures, the default implementation of elem terminates if the sought-after value exists at a finite distance from the left side of the structure:

   >>> 3 `elem` [1..]
   True
   

   >>> 3 `elem` ([4..] ++ [3])
   * Hangs forever *
   

7. notElem :: (Foldable t, Eq a) => a -> t a -> Bool

   distribution-opensuse	OpenSuse.Prelude

   notElem is the negation of elem.

   Examples

   Basic usage:

   >>> 3 `notElem` []
   True
   

   >>> 3 `notElem` [1,2]
   True
   

   >>> 3 `notElem` [1,2,3,4,5]
   False
   

   For infinite structures, notElem terminates if the value exists at a finite distance from the left side of the structure:

   >>> 3 `notElem` [1..]
   False
   

   >>> 3 `notElem` ([4..] ++ [3])
   * Hangs forever *
   

8. elem :: (Foldable t, Eq a) => a -> t a -> Bool

   constrained-categories	Control.Category.Constrained.Prelude

   Does the element occur in the structure? Note: elem is often used in infix form.

   Examples

   Basic usage:

   >>> 3 `elem` []
   False
   

   >>> 3 `elem` [1,2]
   False
   

   >>> 3 `elem` [1,2,3,4,5]
   True
   

   For infinite structures, the default implementation of elem terminates if the sought-after value exists at a finite distance from the left side of the structure:

   >>> 3 `elem` [1..]
   True
   

   >>> 3 `elem` ([4..] ++ [3])
   * Hangs forever *
   

9. notElem :: (Foldable t, Eq a) => a -> t a -> Bool

   constrained-categories	Control.Category.Constrained.Prelude

   notElem is the negation of elem.

   Examples

   Basic usage:

   >>> 3 `notElem` []
   True
   

   >>> 3 `notElem` [1,2]
   True
   

   >>> 3 `notElem` [1,2,3,4,5]
   False
   

   For infinite structures, notElem terminates if the value exists at a finite distance from the left side of the structure:

   >>> 3 `notElem` [1..]
   False
   

   >>> 3 `notElem` ([4..] ++ [3])
   * Hangs forever *
   

10. elem :: (Foldable t, Eq a) => a -> t a -> Bool

    constrained-categories	Control.Category.Hask

    Does the element occur in the structure? Note: elem is often used in infix form.

    Examples

    Basic usage:

    >>> 3 `elem` []
    False
    

    >>> 3 `elem` [1,2]
    False
    

    >>> 3 `elem` [1,2,3,4,5]
    True
    

    For infinite structures, the default implementation of elem terminates if the sought-after value exists at a finite distance from the left side of the structure:

    >>> 3 `elem` [1..]
    True
    

    >>> 3 `elem` ([4..] ++ [3])
    * Hangs forever *
    

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