Utilities | Quickutil

Given a function fun, return a variadic function which results in fun being called on the passed argument list. (Note: fun will not be applied to the passed argument list.)

The resulting function is able to be applied to lists as a result (hence "appliable").

Provides: applyable

functional

Source Code

applying v1.0

Given a function fun, return a unary function whose result is applying fun to the single argument.

Provides: applying

functional

Source Code

compose-apply v1.0

Create a variadic function whose result is applying the function fun to results obtained by applying each of funs to the argument list.

Example:

` (defvar average-values (compose-apply '/ '+ (applyable 'length))) (defvar average-list (compose-apply '/ (applying '+) 'length))

(funcall average-values 1 2 3) => 2  
(funcall average-list '(1 2 3) => 2  
```

Provides: compose-apply

functional

Source Code

ensure-function v1.0

Returns the function designated by function-designator: if function-designator is a function, it is returned, otherwise it must be a function name and its fdefinition is returned.

Provides: ensure-function

alexandria functional

Source Code

ensure-functionf v1.0

Multiple-place modify macro for ensure-function: ensures that each of places contains a function.

Provides: ensure-functionf
Requires: ensure-function

alexandria functional

Source Code

disjoin v1.0

Returns a function that applies each of predicate and more-predicate functions in turn to its arguments, returning the primary value of the first predicate that returns true, without calling the remaining predicates. If none of the predicates returns true, nil is returned.

Provides: disjoin
Requires: ensure-function

alexandria functional orthogonality

Source Code

conjoin v1.0

Returns a function that applies each of predicate and more-predicate functions in turn to its arguments, returning nil if any of the predicates returns false, without calling the remaining predicates. If none of the predicates returns false, returns the primary value of the last predicate.

Provides: conjoin

alexandria functional orthogonality

Source Code

compose v1.0

Returns a function composed of function and more-functions that applies its ; arguments to to each in turn, starting from the rightmost of more-functions, and then calling the next one with the primary value of the last.

Provides: compose
Requires: make-gensym-list, ensure-function

alexandria functional orthogonality

Source Code

multiple-value-compose v1.0

Returns a function composed of function and more-functions that applies its arguments to each in turn, starting from the rightmost of more-functions, and then calling the next one with all the return values of the last.

Provides: multiple-value-compose
Requires: make-gensym-list, ensure-function

alexandria functional orthogonality

Source Code

curry v1.0

Returns a function that applies arguments and the arguments it is called with to function.