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You're viewing version 1.2.0 of instance?. The latest stable version of Clojure Core is 1.3.0.

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1.2.0

1.2.0
1.3.0

instance?

clojure.core

(instance? c x)

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

3 Examples top

link | changes
```
user=> (instance? Long 1)
true
user=> (instance? Integer 1)
false
user=> (instance? Number 1)
true
user=> (instance? String 1)
false
user=> (instance? String "1")
true
```
user=> (instance? Long 1) true user=> (instance? Integer 1) false user=> (instance? Number 1) true user=> (instance? String 1) false user=> (instance? String "1") true
link | changes
```
user=> (def al (new java.util.ArrayList))
#'user/al
user=> (instance? java.util.Collection al)
true
user=> (instance? java.util.RandomAccess al)
true
user=> (instance? java.lang.String al)
false
```
user=> (def al (new java.util.ArrayList)) #'user/al user=> (instance? java.util.Collection al) true user=> (instance? java.util.RandomAccess al) true user=> (instance? java.lang.String al) false
link | changes
```
;; Some things are more than what they seem to be at first glance
user=> (instance? clojure.lang.IFn +)
true
user=> (instance? clojure.lang.Keyword :a)
true
user=> (instance? clojure.lang.IFn :a)
true
user=> (instance? clojure.lang.IFn {:a 1})
true
```
;; Some things are more than what they seem to be at first glance user=> (instance? clojure.lang.IFn +) true user=> (instance? clojure.lang.Keyword :a) true user=> (instance? clojure.lang.IFn :a) true user=> (instance? clojure.lang.IFn {:a 1}) true

Source clojure/core.clj:124 top

(def
 ^{:arglists '([^Class c x])
   :doc "Evaluates x and tests if it is an instance of the class
    c. Returns true or false"
   :added "1.0"}
 instance? (fn instance? [^Class c x] (. c (isInstance x))))

Vars in clojure.core/instance?: fn

Used in 72 other vars (expand)

read-line re-pattern keyword? chunked-seq? find-protocol-impl the-ns sequential? fn? empty string? sorted? ns-publics derive symbol? ns-interns number? integer? reversible? seq? char? ratio? vec future? vector? ns-refers counted? class? var? list? into associative? float? decimal? map? ns-imports ifn? defmulti bigdec bigint delay? set? coll? meta collection-tag repl-exception fresh-line replace replace-first error-el emit-element seqable? with-handler instance-case as-str open-url-in-swing maybe-atomize as-str jmx->clj component? wrap-file-info string-or-regex? match-fn parse maybe-ns inspectee-title emacs-inspect make-server-socket ssh-agent? add-identity create-ssh-agent sh dot-maker

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Clojure Core

Namespaces

instance?

clojure.core

3 Examples top

See Also top

Source clojure/core.clj:124 top

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