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Function IDENTITY

Syntax

  • identity objectobject

Arguments and Values

Description

Returns its argument object.

Examples

(identity 101)

101

(mapcan #'identity (list (list 1 2 3) '(4 5 6)))

(1 2 3 4 5 6)

Side Effects

None.

Affected By

None.

Exceptional Situations

None.

See Also

None.

Notes

identity is intended for use with functions that require a function as an argument.

(eql x (identity x)) returns true for all possible values of x, but (eq x (identity x)) might return false when x is a number or character.

identity could be defined by:

(defun identity (x) x)