Type System

bigdec

Coerce to BigDecimal

bigint

Coerce to BigInt

biginteger

Coerce to BigInteger

boolean

Coerce to boolean

byte

Coerce to byte

denominator

Returns the denominator part of a Ratio.

double

Coerce to double

float

Coerce to float

int

Coerce to int

long

Coerce to long

num

Coerce to Number

numerator

Returns the numerator part of a Ratio.

parse-timestamp

Parse a string containing an RFC3339-like like timestamp. The function new-instant is called with the following argumen...

rationalize

returns the rational value of num

read-instant-calendar

To read an instant as a java.util.Calendar, bind *data-readers* to a map with this var as the value for the 'inst key. ...

read-instant-date

To read an instant as a java.util.Date, bind *data-readers* to a map with this var as the value for the 'inst key. The t...

read-instant-timestamp

To read an instant as a java.sql.Timestamp, bind *data-readers* to a map with this var as the value for the 'inst key. T...

short

Coerce to short

unchecked-byte

Coerce to byte. Subject to rounding or truncation.

unchecked-char

Coerce to char. Subject to rounding or truncation.

unchecked-double

Coerce to double. Subject to rounding.

unchecked-float

Coerce to float. Subject to rounding.

unchecked-int

Coerce to int. Subject to rounding or truncation.

unchecked-long

Coerce to long. Subject to rounding or truncation.

unchecked-short

Coerce to short. Subject to rounding or truncation.

validated

Return a function which constructs an instant by calling constructor after first validating that those arguments are in ...

ancestors

Returns the immediate and indirect parents of tag, either via a Java type inheritance relationship or a relationship e...

definterface

Creates a new Java interface with the given name and method sigs. The method return types and parameter types may be s...

defmethod

Creates and installs a new method of multimethod associated with dispatch-value.

defmulti

Creates a new multimethod with the associated dispatch function. The docstring and attr-map are optional. Options a...

defprotocol

A protocol is a named set of named methods and their signatures: (defprotocol AProtocolName ;optional doc string ...

derive

Establishes a parent/child relationship between parent and tag. Parent must be a namespace-qualified symbol or keyword...

descendants

Returns the immediate and indirect children of tag, through a relationship established via derive. h must be a hierarc...

extend

Implementations of protocol methods can be provided using the extend construct: (extend AType AProtocol {:fo...

extend-protocol

Useful when you want to provide several implementations of the same protocol all at once. Takes a single protocol and ...

extend-type

A macro that expands into an extend call. Useful when you are supplying the definitions explicitly inline, extend-type...

get-method

Given a multimethod and a dispatch value, returns the dispatch fn that would apply to that value, or nil if none apply...

make-hierarchy

Creates a hierarchy object for use with derive, isa? etc.

methods

Given a multimethod, returns a map of dispatch values -> dispatch fns

parents

Returns the immediate parents of tag, either via a Java type inheritance relationship or a relationship established vi...

prefer-method

Causes the multimethod to prefer matches of dispatch-val-x over dispatch-val-y when there is a conflict

underive

Removes a parent/child relationship between parent and tag. h must be a hierarchy obtained from make-hierarchy, if not...

NaN?

Returns true if num is NaN, else false

any?

Returns true given any argument.

associative?

Returns true if coll implements Associative

bases

Returns the immediate superclass and direct interfaces of c, if any

boolean?

Return true if x is a Boolean

bound?

Returns true if all of the vars provided as arguments have any bound value, root or thread-local. Implies that deref'...

bytes?

Return true if x is a byte array

char?

Return true if x is a Character

chunked-seq?

class

Returns the Class of x

class?

Returns true if x is an instance of Class

counted?

Returns true if coll implements count in constant time

decimal?

Returns true if n is a BigDecimal

double?

Return true if x is a Double

even?

Returns true if n is even, throws an exception if n is not an integer

extends?

Returns true if atype extends protocol

false?

Returns true if x is the value false, false otherwise.

float?

Returns true if n is a floating point number

fn?

Returns true if x implements Fn, i.e. is an object created via fn.

ident?

Return true if x is a symbol or keyword

identical?

Tests if 2 arguments are the same object

ifn?

Returns true if x implements IFn. Note that many data structures (e.g. sets and maps) implement IFn

indexed?

Return true if coll implements Indexed, indicating efficient lookup by index

infinite?

Returns true if num is negative or positive infinity, else false

inst?

Return true if x satisfies Inst

instance?

Evaluates x and tests if it is an instance of the class c. Returns true or false

int?

Return true if x is a fixed precision integer

integer?

Returns true if n is an integer

isa?

Returns true if (= child parent), or child is directly or indirectly derived from parent, either via a Java type inher...

keyword?

Return true if x is a Keyword

list?

Returns true if x implements IPersistentList

map-entry?

Return true if x is a map entry

map?

Return true if x implements IPersistentMap

nat-int?

Return true if x is a non-negative fixed precision integer

neg-int?

Return true if x is a negative fixed precision integer

neg?

Returns true if num is less than zero, else false

nil?

Returns true if x is nil, false otherwise.

number?

Returns true if x is a Number

odd?

Returns true if n is odd, throws an exception if n is not an integer

pos-int?

Return true if x is a positive fixed precision integer

pos?

Returns true if num is greater than zero, else false

qualified-ident?

Return true if x is a symbol or keyword with a namespace

qualified-keyword?

Return true if x is a keyword with a namespace

qualified-symbol?

Return true if x is a symbol with a namespace

ratio?

Returns true if n is a Ratio

rational?

Returns true if n is a rational number

realized?

Returns true if a value has been produced for a promise, delay, future or lazy sequence.

record?

Returns true if x is a record

reversible?

Returns true if coll implements Reversible

satisfies?

Returns true if x satisfies the protocol

seq?

Return true if x implements ISeq

seqable?

Return true if the seq function is supported for x

sequential?

Returns true if coll implements Sequential

set?

Returns true if x implements IPersistentSet

simple-ident?

Return true if x is a symbol or keyword without a namespace

simple-keyword?

Return true if x is a keyword without a namespace

simple-symbol?

Return true if x is a symbol without a namespace

some?

Returns true if x is not nil, false otherwise.

sorted?

Returns true if coll implements Sorted

special-symbol?

Returns true if s names a special form

string?

Return true if x is a String

supers

Returns the immediate and indirect superclasses and interfaces of c, if any

symbol?

Return true if x is a Symbol

thread-bound?

Returns true if all of the vars provided as arguments have thread-local bindings. Implies that set!'ing the provided ...

true?

Returns true if x is the value true, false otherwise.

type

Returns the :type metadata of x, or its Class if none

uri?

Return true if x is a java.net.URI

uuid?

Return true if x is a java.util.UUID

var?

Returns true if v is of type clojure.lang.Var

vector?

Return true if x implements IPersistentVector

volatile?

Returns true if x is a volatile.

zero?

Returns true if num is zero, else false