Clojure Programming/Examples/API Examples

This page gives example usage for Clojure API function calls. For a more general introduction to Clojure by example please see http://en.wikibooks.org/wiki/Clojure_Programming/By_Example

Contents

DocumentationEdit

This page provides examples for the following functions.

• doc
• find-doc
• source

Data StructuresEdit

NumbersEdit

Computation	+	-	*	/	inc	dec	min	max	rem	rationalize
Comparison	==	<	>	<=	>=
Predicates	zero?	pos?	neg?

StringsEdit

• str

CharactersEdit

Advanced Data StructuresEdit

ListsEdit

VectorsEdit

MapsEdit

• get
• assoc-in
• merge

Struct MapsEdit

• accessor
• assoc
• defstruct
• struct
• struct-map

Array MapsEdit

SetsEdit

• union

ZippersEdit

• zipper
• zipmap

SequencesEdit

• interpose
• interleave
• reverse
• butlast
• replace

Sequence BuildingEdit

• conj
• concat
• merge

Mapping OperatorsEdit

This page provides examples for the following functions.

• map
• reduce
• apply

MacrosEdit

• ->
• cond
• condp

do MacrosEdit

This page provides examples for the following functions.

• doseq
• doall
• dorun
• doto

Variable DefinitionEdit

This page provides examples for the following functions.

• def
• binding

MultiMethodEdit

This page defines the following functions

• defmulti
• defmethod

Reference ToolsEdit

This page defines the following functions.

• ref
• ref-set
• deref
• @
• delay
• force
• commute

Predicate functionsEdit

This page provides examples for the following functions.

• drop-while
• filter
• not-any
• remove
• every?
• some

Recursion ToolsEdit

This page defines the following functions.

• loop
• recur
• lazy-cons

Function ToolsEdit

This page provides examples for the following functions.

• fn
• #()
• "lambda"
• %
• complement

Java InteractionEdit

This page provides examples for the following functions.

• memfn
• proxy
• into-array
• double-array
• genclass

NamespacesEdit

nsEdit

(ns test.test 
  (:refer-clojure :exclude [+ -])) 
(defn + 
  [a b] 
  33) 
(+ 1 2) ;= 33 

requireEdit

(require '[clojure.zip :as zip]) 
(require ['clojure.contrib.sql :as 'sql])

Misc.Edit

testEdit

user=> (defn
  #^{:test (fn []
    (assert (= 4 (myadd 2 2))))}
  myadd [a b]
  (+ a b))
#'user/myadd
user=> (test #'myadd)
:ok