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Clojure Core

Float TOC

Quick Ref for Clojure Core

Adapted from Johannes Friestad's excellent quick ref.

Simple Values

Numbers

Simple Values

Arithmetic

+ - * / quot rem mod inc dec max min with-precision

Compare

= == not= < > <= >=

Bitwise Operations

bit-and bit-or bit-xor bit-flip bit-not bit-clear bit-set bit-shift-left bit-shift-right bit-test

Cast	byte short int long float double bigint bigdec num rationalize

Test	nil? identical? zero? pos? neg? even? odd?

Symbols / Keywords

Simple Values

Create

keyword symbol

Use	name intern namespace

Test	keyword? symbol?

Strings / Characters

Simple Values

Create

str print-str println-str pr-str prn-str with-out-str

Use	count get subs format

Cast / Test

char char? string?

Regular Expressions

Simple Values

Create

re-pattern re-matcher

Use	re-find re-matches re-seq re-groups

Operations

Flow Control

Operations

Normal

if if-not if-let when when-not when-let when-first cond condp case do eval loop recur trampoline while

Exceptional

try catch finally throw assert

Delay

delay delay? deref force

Function Based

repeatedly iterate

Sequence Based

dotimes doseq for

Laziness

lazy-seq lazy-cat doall dorun

Type Inspection

Operations

Clojure Types

type extends? satisfies?

Java Types

class bases supers class? instance? isa? cast

Concurrency

Operations

General

deref get-validator set-validator!

Atoms

atom swap! reset! compare-and-set!

Refs	ref sync dosync ref-set alter commute ensure io! ref-history-count ref-max-history ref-min-history

Agents

agent send send-off await await-for agent-error restart-agent shutdown-agents *agent* error-handler set-error-handler! error-mode set-error-mode! release-pending-sends

Futures

future future-call future-done? future-cancel future-cancelled? future?

Thread Local Values

bound-fn bound-fn* get-thread-bindings push-thread-bindings pop-thread-bindings thread-bound?

Misc	locking pcalls pvalues pmap seque promise deliver add-watch remove-watch

Functions

General

Functions

Create

fn defn defn- definline identity constantly memfn comp complement partial juxt memoize

Call	-> ->> apply

Test

fn? ifn?

Multifunctions

Functions

Create

defmulti defmethod

Inspect and Modify

get-method methods prefer-method prefers remove-method remove-all-methods

Macros

Functions

Create

defmacro macroexpand macroexpand-1 gensym

Java Interop

Functions

Use	doto .. set!

Arrays

make-array object-array boolean-array byte-array char-array short-array int-array long-array float-array double-array aclone to-array to-array-2d into-array

Use	aget aset aset-boolean aset-char aset-byte aset-int aset-long aset-short aset-float aset-double alength amap areduce

Cast	booleans bytes chars ints shorts longs floats doubles

Proxies

Functions

Create

proxy get-proxy-class construct-proxy init-proxy

Misc	proxy-mappings proxy-super update-proxy

Collections / Sequences

Collections

Collections / Sequences

Generic Operations

count empty not-empty into conj

Content Tests

contains? distinct? empty? every? not-every? some not-any?

Capabilities

sequential? associative? sorted? counted? reversible?

Type Tests

coll? seq? vector? list? map? set?

Vectors

Collections / Sequences

Create

vec vector vector-of

Use	conj peek pop get assoc subvec rseq

Lists

Collections / Sequences

Create

list list*

Use	cons conj peek pop first rest

Maps

Collections / Sequences

Create

hash-map array-map zipmap sorted-map sorted-map-by bean frequencies

Use	assoc assoc-in dissoc find key val keys vals get get-in update-in select-keys merge merge-with

Use (Sorted Maps)

rseq subseq subseq rsubseq rsubseq

Sets

Collections / Sequences

Create

hash-set set sorted-set sorted-set-by

Use	conj disj get

Structs

Collections / Sequences

Create

defstruct create-struct struct struct-map accessor

Use

get assoc

Sequences

Collections / Sequences

Create

seq sequence repeat replicate range repeatedly iterate lazy-seq lazy-cat cycle interleave interpose tree-seq xml-seq enumeration-seq iterator-seq file-seq line-seq resultset-seq

Use (General)

first second last rest next ffirst nfirst fnext nnext nth nthnext rand-nth butlast take take-last take-nth take-while drop drop-last drop-while keep keep-indexed

Use ('Modification')

conj concat distinct group-by partition partition-all partition-by split-at split-with filter remove replace shuffle

Use (Iteration)

for doseq map map-indexed mapcat reduce reductions max-key min-key doall dorun

Transients

Collections / Sequences

Create

transient persistent!

Use (General)

conj! pop! assoc! dissoc! disj!

Use ('Modification')

conj concat distinct group-by partition partition-all partition-by split-at split-with filter remove replace shuffle

Use (Iteration)

for doseq map map-indexed mapcat reduce reductions max-key min-key doall dorun

Code Structure

Varibles

Code Structure

Create

def defonce intern declare

Use	set! alter-var-root binding with-bindings with-bindings* with-local-vars letfn gensym

Inspect

var find-var var-get var? bound? resolve ns-resolve special-symbol?

Namespaces

Code Structure

Create & Delete

ns create-ns remove-ns

Inspect

*ns* ns-name all-ns the-ns find-ns ns-publics ns-interns ns-refers ns-aliases ns-imports ns-map

Use	in-ns ns-resolve ns-unalias ns-unmap alias

Misc	namespace-munge print-namespace-doc

Hierarchies

Code Structure

General

make-hierarchy derive underive parents ancestors descendants isa?

User Defined Types

Code Structure

General

defprotocol defrecord deftype reify extend extend-protocol extend-type extenders

Metadata

Code Structure

General

meta with-meta vary-meta reset-meta! alter-meta!

Environment

Require / Import

Environment

General

use require import refer-clojure refer

Code

Environment

General

*compile-files* *compile-path* *file* *warn-on-reflection* compile load load-file load-reader load-string read read-string gen-class gen-interface loaded-libs test

IO

Environment

General

*in* *out* *err* print printf println pr prn print-str println-str pr-str prn-str newline flush read-line slurp spit with-in-str with-out-str with-open

REPL

Environment

General

*1 *2 *3 *e *print-dup* *print-length* *print-level* *print-meta* *print-readably*

Misc

Environment

General

*clojure-version* clojure-version *command-line-args* time

Namespaces

clojure
- core
  - protocols
- inspector
- java
  - browse
  - io
  - javadoc
  - shell
- main
- pprint
- repl
- set
- stacktrace
- string
- template
- test
  - junit
  - tap
- walk
- xml
- zip

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