clj-toolbox.functools — org.clojars.tanelso2/clj-toolbox 2.1.1

Functions for manipulating functions and producing other functions

apply-n-times clj

(apply-n-times n f x)

Applies function {f} {n} times with a starting value of {x} For example: (apply-n-times 2 inc 0) is equivalent to (inc (inc 0)) (apply-n-times 3 inc 5) is equivalent to (inc (inc (inc 5)))

cache-most-recent-ret clj

(cache-most-recent-ret a f)

Returns a fn that when called, passes the args to f and caches the return value in the atom a

defnmem clj macro

(defnmem name & fndef)

Defines a memoized function Examples: (defnmem fibonacci [x] (if (or (= 0 x) (= 1 x)) 1 (+ (fibonacci (- x 1)) (fibonacci (- x 2)))))

ignore-args clj

(ignore-args f)

Takes a zero-arity function and wraps it to take any args and ignore them

inverse clj

(inverse f)

Returns a function that returns the additive inverse (negative) of what the input function would return

Example: ((inverse (constantly 2))) => -2

loop-in-background-thread! clj

(loop-in-background-thread! f sleep-seconds)

(loop-in-background-thread! f sleep-seconds sleep-millis)

map-paginated clj

(map-paginated f
               &
               {:keys [get-token get-vals]
                :or {get-token identity get-vals identity}})

Maps a function of one argument continuously

This is intended to be used with api calls that are paginated to get the full list of results.

Args: f - function of one argument, either nil or a value to be used as a continuation token :get-token - extract the next continuation token from the return value of (f token) :get-vals - extract the values to be returned from the return value of (f token)

mul-inverse clj

(mul-inverse f)

Returns a function that returns the multiplicative inverse (1.0/x) of what the input function would return