not package:rebase

Boolean "not"

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 *

Cn: Other, Not Assigned

blocked on some other resource. Without -threaded, I/O and threadDelay show up as BlockedOnOther, with -threaded they show up as BlockedOnMVar.

Adds a location description and maybe a file path and file handle to an IOException. If any of the file handle or file path is not given the corresponding value in the IOException remains unaltered.

I/O error where the operation failed because one of its arguments does not exist.

An error indicating that an IO operation failed because one of its arguments does not exist.

I/O error where the operation failed because one of its arguments does not exist.

The isNothing function returns True iff its argument is Nothing.

Examples

Basic usage:

>>> isNothing (Just 3)
False

>>> isNothing (Just ())
False

>>> isNothing Nothing
True

Only the outer constructor is taken into consideration:

>>> isNothing (Just Nothing)
False