clj-toolbox.prelude — org.clojars.tanelso2/clj-toolbox 0.8.1

any-in? clj

(any-in? pred coll)

Returns true if (pred x) is logical true for any x in coll, else false.

average clj

(average coll)

Gets the average of every element in coll

average-by clj

(average-by f coll)

Gets the average of (f x) for every x in coll

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)))))

derefable? clj

(derefable? x)

Returns true if x is an instance of clojure.langIDeref

find-first clj

(find-first pred coll)

Returns the first x in coll for which (pred x) returns true. returns nil if none is found

into-map clj

(into-map coll)

(into-map kf coll)

(into-map kf vf coll)

Transforms coll into a hash-map by using (kf x) as the key and (vf x) as the value for each x in coll vf defaults to identity if not provided if only coll is provided, will assume coll is a list of pairs

now clj

(now)

Gets the time in milliseconds since unix epoch as a Long

parse-int clj

(parse-int s)

Shortcut for Integer/parseInt to make it easier to pass around as an argument

strict-partition clj

(strict-partition n coll)

Like parition, but throws an exception if the number of elements in coll are not evenly divisible by n, instead of partition's behavior of having the last group be too small.

sum clj

(sum coll)

Gets the sum of every element in coll

sum-by clj

(sum-by f coll)

Gets the sum of (f x) for every x in coll

take-range clj

(take-range start end coll)

Returns the part of the coll from index start (inclusive) to end (exclusive).

update! clj

(update! m k f)

Like update, but for transients